/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:29:51,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:29:51,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:29:51,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:29:51,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:29:51,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:29:51,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:29:51,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:29:51,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:29:51,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:29:51,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:29:51,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:29:51,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:29:51,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:29:51,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:29:51,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:29:51,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:29:51,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:29:51,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:29:51,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:29:51,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:29:51,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:29:51,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:29:51,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:29:51,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:29:51,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:29:51,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:29:51,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:29:51,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:29:51,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:29:51,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:29:51,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:29:51,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:29:51,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:29:51,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:29:51,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:29:51,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:29:51,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:29:51,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:29:51,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:29:51,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:29:51,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:29:51,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:29:51,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:29:51,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:29:51,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:29:51,208 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:29:51,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:29:51,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:29:51,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:29:51,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:29:51,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:29:51,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:29:51,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:29:51,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:29:51,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:29:51,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:29:51,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:29:51,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:29:51,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:29:51,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:29:51,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:29:51,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:29:51,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:29:51,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:29:51,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:29:51,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:29:51,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:29:51,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:29:51,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:29:51,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:29:51,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:29:51,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:29:51,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:29:51,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:29:51,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:29:51,735 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:29:51,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 00:29:51,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc995ccd/5ea04c3eb8954a639009919cbb5257c6/FLAG3b92566f0 [2020-10-28 00:29:52,724 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:29:52,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 00:29:52,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc995ccd/5ea04c3eb8954a639009919cbb5257c6/FLAG3b92566f0 [2020-10-28 00:29:52,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cc995ccd/5ea04c3eb8954a639009919cbb5257c6 [2020-10-28 00:29:52,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:29:52,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:29:52,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:29:52,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:29:52,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:29:52,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a1e375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:52, skipping insertion in model container [2020-10-28 00:29:52,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:29:52" (1/1) ... [2020-10-28 00:29:52,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:29:53,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:29:53,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:29:53,978 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:29:54,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:29:54,246 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:29:54,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54 WrapperNode [2020-10-28 00:29:54,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:29:54,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:29:54,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:29:54,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:29:54,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... [2020-10-28 00:29:54,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:29:54,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:29:54,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:29:54,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:29:54,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:29:54,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:29:54,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:29:54,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:29:54,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:29:54,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:29:54,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:29:54,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:29:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:29:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:29:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:29:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:29:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:29:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:29:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:29:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:29:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:29:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:29:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:29:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:29:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:29:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:29:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:29:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:29:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:29:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:29:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:29:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:29:56,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:29:56,580 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:29:56,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:29:56 BoogieIcfgContainer [2020-10-28 00:29:56,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:29:56,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:29:56,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:29:56,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:29:56,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:29:52" (1/3) ... [2020-10-28 00:29:56,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aee096e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:29:56, skipping insertion in model container [2020-10-28 00:29:56,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:29:54" (2/3) ... [2020-10-28 00:29:56,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aee096e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:29:56, skipping insertion in model container [2020-10-28 00:29:56,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:29:56" (3/3) ... [2020-10-28 00:29:56,592 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 00:29:56,605 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:29:56,611 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:29:56,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:29:56,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:29:56,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:29:56,657 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:29:56,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:29:56,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:29:56,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:29:56,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:29:56,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:29:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states. [2020-10-28 00:29:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 00:29:56,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:56,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:29:56,706 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash 406768194, now seen corresponding path program 1 times [2020-10-28 00:29:56,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:56,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011716371] [2020-10-28 00:29:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:59,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:59,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:02,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:02,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 00:30:02,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:30:02,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:30:02,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:30:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 00:30:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:30:02,994 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:03,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:03,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:03,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:03,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 00:30:03,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:03,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:03,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:03,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011716371] [2020-10-28 00:30:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:03,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:03,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692883480] [2020-10-28 00:30:03,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:03,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:03,200 INFO L87 Difference]: Start difference. First operand 422 states. Second operand 4 states. [2020-10-28 00:30:03,759 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-28 00:30:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:07,066 INFO L93 Difference]: Finished difference Result 765 states and 1344 transitions. [2020-10-28 00:30:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:07,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-28 00:30:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:07,088 INFO L225 Difference]: With dead ends: 765 [2020-10-28 00:30:07,088 INFO L226 Difference]: Without dead ends: 597 [2020-10-28 00:30:07,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-28 00:30:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 594. [2020-10-28 00:30:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-28 00:30:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 877 transitions. [2020-10-28 00:30:07,224 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 877 transitions. Word has length 153 [2020-10-28 00:30:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:07,227 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 877 transitions. [2020-10-28 00:30:07,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 877 transitions. [2020-10-28 00:30:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 00:30:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:07,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:07,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:30:07,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -674126172, now seen corresponding path program 1 times [2020-10-28 00:30:07,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:07,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547687219] [2020-10-28 00:30:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:07,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:07,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:08,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:09,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:12,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 00:30:12,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:30:12,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 00:30:12,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:12,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:12,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 00:30:12,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 00:30:12,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:12,895 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:12,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547687219] [2020-10-28 00:30:12,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:12,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:13,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879264631] [2020-10-28 00:30:13,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:13,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:13,005 INFO L87 Difference]: Start difference. First operand 594 states and 877 transitions. Second operand 4 states. [2020-10-28 00:30:13,516 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-28 00:30:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:16,240 INFO L93 Difference]: Finished difference Result 1196 states and 1818 transitions. [2020-10-28 00:30:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:16,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-28 00:30:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:16,256 INFO L225 Difference]: With dead ends: 1196 [2020-10-28 00:30:16,256 INFO L226 Difference]: Without dead ends: 983 [2020-10-28 00:30:16,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-10-28 00:30:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 980. [2020-10-28 00:30:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2020-10-28 00:30:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1469 transitions. [2020-10-28 00:30:16,360 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1469 transitions. Word has length 153 [2020-10-28 00:30:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:16,362 INFO L481 AbstractCegarLoop]: Abstraction has 980 states and 1469 transitions. [2020-10-28 00:30:16,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1469 transitions. [2020-10-28 00:30:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 00:30:16,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:16,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:16,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:30:16,369 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -684623237, now seen corresponding path program 1 times [2020-10-28 00:30:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:16,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403911994] [2020-10-28 00:30:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:16,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:21,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:21,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 00:30:21,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:30:21,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:30:21,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:30:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 00:30:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:22,233 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:22,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:22,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:22,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 00:30:22,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:30:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:22,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403911994] [2020-10-28 00:30:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:22,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887505096] [2020-10-28 00:30:22,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:22,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:22,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:22,376 INFO L87 Difference]: Start difference. First operand 980 states and 1469 transitions. Second operand 5 states. [2020-10-28 00:30:25,182 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-28 00:30:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:26,124 INFO L93 Difference]: Finished difference Result 2845 states and 4252 transitions. [2020-10-28 00:30:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:30:26,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-28 00:30:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:26,137 INFO L225 Difference]: With dead ends: 2845 [2020-10-28 00:30:26,138 INFO L226 Difference]: Without dead ends: 1886 [2020-10-28 00:30:26,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:30:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-10-28 00:30:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1849. [2020-10-28 00:30:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2020-10-28 00:30:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2751 transitions. [2020-10-28 00:30:26,244 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2751 transitions. Word has length 153 [2020-10-28 00:30:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:26,244 INFO L481 AbstractCegarLoop]: Abstraction has 1849 states and 2751 transitions. [2020-10-28 00:30:26,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2751 transitions. [2020-10-28 00:30:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 00:30:26,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:26,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:26,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:30:26,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash -830322902, now seen corresponding path program 1 times [2020-10-28 00:30:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:26,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196430609] [2020-10-28 00:30:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:27,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:31,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 00:30:31,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:30:31,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:30:31,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:30:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:30:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:31,738 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:31,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:31,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:31,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:31,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196430609] [2020-10-28 00:30:31,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:31,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:31,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834480090] [2020-10-28 00:30:31,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:31,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:31,803 INFO L87 Difference]: Start difference. First operand 1849 states and 2751 transitions. Second operand 4 states. [2020-10-28 00:30:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:34,936 INFO L93 Difference]: Finished difference Result 5495 states and 8175 transitions. [2020-10-28 00:30:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:30:34,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-10-28 00:30:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:34,957 INFO L225 Difference]: With dead ends: 5495 [2020-10-28 00:30:34,958 INFO L226 Difference]: Without dead ends: 3674 [2020-10-28 00:30:34,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2020-10-28 00:30:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 1851. [2020-10-28 00:30:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-10-28 00:30:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2753 transitions. [2020-10-28 00:30:35,088 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2753 transitions. Word has length 154 [2020-10-28 00:30:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:35,088 INFO L481 AbstractCegarLoop]: Abstraction has 1851 states and 2753 transitions. [2020-10-28 00:30:35,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:30:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2753 transitions. [2020-10-28 00:30:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 00:30:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:35,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:35,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:30:35,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1321299514, now seen corresponding path program 1 times [2020-10-28 00:30:35,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:35,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987527031] [2020-10-28 00:30:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:35,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:40,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 00:30:40,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:30:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:30:40,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:30:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:30:40,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:40,798 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:40,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:40,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:40,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:40,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:40,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:40,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:30:40,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:40,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:40,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:40,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:40,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:40,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987527031] [2020-10-28 00:30:40,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:40,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643997527] [2020-10-28 00:30:40,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:40,887 INFO L87 Difference]: Start difference. First operand 1851 states and 2753 transitions. Second operand 5 states. [2020-10-28 00:30:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:42,945 INFO L93 Difference]: Finished difference Result 3676 states and 5467 transitions. [2020-10-28 00:30:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:42,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-28 00:30:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:42,956 INFO L225 Difference]: With dead ends: 3676 [2020-10-28 00:30:42,956 INFO L226 Difference]: Without dead ends: 1851 [2020-10-28 00:30:42,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:30:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-10-28 00:30:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1850. [2020-10-28 00:30:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1850 states. [2020-10-28 00:30:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2750 transitions. [2020-10-28 00:30:43,052 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2750 transitions. Word has length 155 [2020-10-28 00:30:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:43,052 INFO L481 AbstractCegarLoop]: Abstraction has 1850 states and 2750 transitions. [2020-10-28 00:30:43,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2750 transitions. [2020-10-28 00:30:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 00:30:43,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:43,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:43,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:30:43,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1459327150, now seen corresponding path program 1 times [2020-10-28 00:30:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771068133] [2020-10-28 00:30:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:43,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:44,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:48,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:30:48,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 00:30:48,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:30:48,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:48,673 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:48,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:48,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:48,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:48,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:48,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771068133] [2020-10-28 00:30:48,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:48,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:30:48,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072475839] [2020-10-28 00:30:48,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:30:48,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:30:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:30:48,743 INFO L87 Difference]: Start difference. First operand 1850 states and 2750 transitions. Second operand 5 states. [2020-10-28 00:30:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:30:50,836 INFO L93 Difference]: Finished difference Result 3679 states and 5469 transitions. [2020-10-28 00:30:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:30:50,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-28 00:30:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:30:50,847 INFO L225 Difference]: With dead ends: 3679 [2020-10-28 00:30:50,847 INFO L226 Difference]: Without dead ends: 1848 [2020-10-28 00:30:50,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:30:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2020-10-28 00:30:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1848. [2020-10-28 00:30:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1848 states. [2020-10-28 00:30:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2746 transitions. [2020-10-28 00:30:50,948 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2746 transitions. Word has length 155 [2020-10-28 00:30:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:30:50,948 INFO L481 AbstractCegarLoop]: Abstraction has 1848 states and 2746 transitions. [2020-10-28 00:30:50,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:30:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2746 transitions. [2020-10-28 00:30:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 00:30:50,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:30:50,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:30:50,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:30:50,953 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:30:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:30:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash 48324751, now seen corresponding path program 1 times [2020-10-28 00:30:50,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:30:50,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943126628] [2020-10-28 00:30:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:30:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:54,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:56,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 00:30:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:56,505 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:30:56,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:56,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:56,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:56,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:56,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943126628] [2020-10-28 00:30:56,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:56,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791909758] [2020-10-28 00:30:56,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:56,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:56,578 INFO L87 Difference]: Start difference. First operand 1848 states and 2746 transitions. Second operand 4 states. [2020-10-28 00:30:59,601 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-28 00:31:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:00,897 INFO L93 Difference]: Finished difference Result 4426 states and 6587 transitions. [2020-10-28 00:31:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:00,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-10-28 00:31:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:00,912 INFO L225 Difference]: With dead ends: 4426 [2020-10-28 00:31:00,913 INFO L226 Difference]: Without dead ends: 2754 [2020-10-28 00:31:00,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2020-10-28 00:31:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 2717. [2020-10-28 00:31:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2717 states. [2020-10-28 00:31:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 3991 transitions. [2020-10-28 00:31:01,050 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 3991 transitions. Word has length 155 [2020-10-28 00:31:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:01,051 INFO L481 AbstractCegarLoop]: Abstraction has 2717 states and 3991 transitions. [2020-10-28 00:31:01,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 3991 transitions. [2020-10-28 00:31:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 00:31:01,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:01,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:01,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:31:01,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1814231917, now seen corresponding path program 1 times [2020-10-28 00:31:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:01,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545107688] [2020-10-28 00:31:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:01,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:01,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:06,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:06,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 00:31:06,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:31:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:31:06,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:06,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 00:31:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 00:31:06,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:06,573 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:31:06,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:06,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:06,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:06,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:06,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:06,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:06,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545107688] [2020-10-28 00:31:06,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:06,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:06,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98044634] [2020-10-28 00:31:06,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:06,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:06,640 INFO L87 Difference]: Start difference. First operand 2717 states and 3991 transitions. Second operand 4 states. [2020-10-28 00:31:09,761 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-28 00:31:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:10,061 INFO L93 Difference]: Finished difference Result 6603 states and 9852 transitions. [2020-10-28 00:31:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:10,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-10-28 00:31:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:10,081 INFO L225 Difference]: With dead ends: 6603 [2020-10-28 00:31:10,082 INFO L226 Difference]: Without dead ends: 4104 [2020-10-28 00:31:10,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2020-10-28 00:31:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3565. [2020-10-28 00:31:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3565 states. [2020-10-28 00:31:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5366 transitions. [2020-10-28 00:31:10,287 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5366 transitions. Word has length 157 [2020-10-28 00:31:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:10,288 INFO L481 AbstractCegarLoop]: Abstraction has 3565 states and 5366 transitions. [2020-10-28 00:31:10,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5366 transitions. [2020-10-28 00:31:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 00:31:10,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:10,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:10,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:31:10,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1288379585, now seen corresponding path program 1 times [2020-10-28 00:31:10,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401852944] [2020-10-28 00:31:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:10,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:15,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:31:15,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:31:15,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 00:31:15,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:15,919 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:31:15,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:15,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:15,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:15,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401852944] [2020-10-28 00:31:15,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:15,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:31:15,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047519649] [2020-10-28 00:31:15,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:31:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:31:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:31:15,976 INFO L87 Difference]: Start difference. First operand 3565 states and 5366 transitions. Second operand 10 states. [2020-10-28 00:31:16,542 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-28 00:31:20,333 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 236 [2020-10-28 00:31:20,855 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-28 00:31:21,888 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 236 [2020-10-28 00:31:23,822 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 235 [2020-10-28 00:31:24,309 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-28 00:31:25,212 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2020-10-28 00:31:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:25,626 INFO L93 Difference]: Finished difference Result 16310 states and 24991 transitions. [2020-10-28 00:31:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 00:31:25,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 159 [2020-10-28 00:31:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:25,693 INFO L225 Difference]: With dead ends: 16310 [2020-10-28 00:31:25,694 INFO L226 Difference]: Without dead ends: 14058 [2020-10-28 00:31:25,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 00:31:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14058 states. [2020-10-28 00:31:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14058 to 8020. [2020-10-28 00:31:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8020 states. [2020-10-28 00:31:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 12167 transitions. [2020-10-28 00:31:26,293 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 12167 transitions. Word has length 159 [2020-10-28 00:31:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:26,293 INFO L481 AbstractCegarLoop]: Abstraction has 8020 states and 12167 transitions. [2020-10-28 00:31:26,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:31:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 12167 transitions. [2020-10-28 00:31:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 00:31:26,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:26,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:26,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:31:26,304 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1381713753, now seen corresponding path program 1 times [2020-10-28 00:31:26,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:26,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408064350] [2020-10-28 00:31:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:26,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:28,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:31,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 00:31:31,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:31:31,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:31:31,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:31,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:31,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:31:31,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:31:31,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:31,828 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:31:31,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:31,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:31,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:31,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:31,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:31:31,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:31,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:31,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408064350] [2020-10-28 00:31:31,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:31,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065959292] [2020-10-28 00:31:31,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:31,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:31,878 INFO L87 Difference]: Start difference. First operand 8020 states and 12167 transitions. Second operand 4 states. [2020-10-28 00:31:34,706 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-28 00:31:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:35,282 INFO L93 Difference]: Finished difference Result 19480 states and 29920 transitions. [2020-10-28 00:31:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:31:35,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-28 00:31:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:35,318 INFO L225 Difference]: With dead ends: 19480 [2020-10-28 00:31:35,319 INFO L226 Difference]: Without dead ends: 11822 [2020-10-28 00:31:35,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11822 states. [2020-10-28 00:31:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11822 to 10837. [2020-10-28 00:31:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10837 states. [2020-10-28 00:31:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10837 states to 10837 states and 16716 transitions. [2020-10-28 00:31:35,931 INFO L78 Accepts]: Start accepts. Automaton has 10837 states and 16716 transitions. Word has length 159 [2020-10-28 00:31:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:35,932 INFO L481 AbstractCegarLoop]: Abstraction has 10837 states and 16716 transitions. [2020-10-28 00:31:35,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10837 states and 16716 transitions. [2020-10-28 00:31:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 00:31:35,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:35,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:35,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:31:35,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -651584389, now seen corresponding path program 1 times [2020-10-28 00:31:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:35,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154329908] [2020-10-28 00:31:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:40,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 00:31:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:41,512 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:31:41,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:41,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:41,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:41,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:41,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:31:41,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:41,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:41,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:41,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154329908] [2020-10-28 00:31:41,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:41,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:31:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251814743] [2020-10-28 00:31:41,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:31:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:31:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:31:41,613 INFO L87 Difference]: Start difference. First operand 10837 states and 16716 transitions. Second operand 5 states. [2020-10-28 00:31:44,440 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-28 00:31:46,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:46,258 INFO L93 Difference]: Finished difference Result 31733 states and 48859 transitions. [2020-10-28 00:31:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:31:46,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-28 00:31:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:46,306 INFO L225 Difference]: With dead ends: 31733 [2020-10-28 00:31:46,306 INFO L226 Difference]: Without dead ends: 20907 [2020-10-28 00:31:46,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:31:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2020-10-28 00:31:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 20872. [2020-10-28 00:31:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20872 states. [2020-10-28 00:31:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 31894 transitions. [2020-10-28 00:31:47,481 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 31894 transitions. Word has length 160 [2020-10-28 00:31:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:47,482 INFO L481 AbstractCegarLoop]: Abstraction has 20872 states and 31894 transitions. [2020-10-28 00:31:47,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:31:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 31894 transitions. [2020-10-28 00:31:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 00:31:47,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:47,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:47,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:31:47,496 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:47,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1228226581, now seen corresponding path program 1 times [2020-10-28 00:31:47,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:47,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946573374] [2020-10-28 00:31:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:47,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:52,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:52,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:52,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 00:31:52,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 00:31:52,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:52,990 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:31:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:31:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:53,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:31:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:31:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:31:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:31:53,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946573374] [2020-10-28 00:31:53,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:31:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:31:53,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804940612] [2020-10-28 00:31:53,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:31:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:31:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:31:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:53,046 INFO L87 Difference]: Start difference. First operand 20872 states and 31894 transitions. Second operand 4 states. [2020-10-28 00:31:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:31:58,033 INFO L93 Difference]: Finished difference Result 62526 states and 95570 transitions. [2020-10-28 00:31:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:31:58,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-28 00:31:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:31:58,129 INFO L225 Difference]: With dead ends: 62526 [2020-10-28 00:31:58,129 INFO L226 Difference]: Without dead ends: 41730 [2020-10-28 00:31:58,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:31:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41730 states. [2020-10-28 00:31:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41730 to 20875. [2020-10-28 00:31:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20875 states. [2020-10-28 00:31:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20875 states to 20875 states and 31898 transitions. [2020-10-28 00:31:59,614 INFO L78 Accepts]: Start accepts. Automaton has 20875 states and 31898 transitions. Word has length 161 [2020-10-28 00:31:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:31:59,614 INFO L481 AbstractCegarLoop]: Abstraction has 20875 states and 31898 transitions. [2020-10-28 00:31:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:31:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20875 states and 31898 transitions. [2020-10-28 00:31:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 00:31:59,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:31:59,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:31:59,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:31:59,627 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:31:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:31:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1221157660, now seen corresponding path program 1 times [2020-10-28 00:31:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:31:59,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725953580] [2020-10-28 00:31:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:31:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:31:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:31:59,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:00,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:00,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:00,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:01,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:32:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:05,193 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:32:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:05,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:05,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:05,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:05,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725953580] [2020-10-28 00:32:05,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:05,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:32:05,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301686542] [2020-10-28 00:32:05,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:32:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:32:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:05,242 INFO L87 Difference]: Start difference. First operand 20875 states and 31898 transitions. Second operand 5 states. [2020-10-28 00:32:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:08,317 INFO L93 Difference]: Finished difference Result 41671 states and 63697 transitions. [2020-10-28 00:32:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:08,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-28 00:32:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:08,355 INFO L225 Difference]: With dead ends: 41671 [2020-10-28 00:32:08,356 INFO L226 Difference]: Without dead ends: 20875 [2020-10-28 00:32:08,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:32:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20875 states. [2020-10-28 00:32:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20875 to 20872. [2020-10-28 00:32:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20872 states. [2020-10-28 00:32:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 31892 transitions. [2020-10-28 00:32:09,583 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 31892 transitions. Word has length 162 [2020-10-28 00:32:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:09,583 INFO L481 AbstractCegarLoop]: Abstraction has 20872 states and 31892 transitions. [2020-10-28 00:32:09,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:32:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 31892 transitions. [2020-10-28 00:32:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 00:32:09,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:09,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:09,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:32:09,593 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash 948595381, now seen corresponding path program 1 times [2020-10-28 00:32:09,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:09,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203025733] [2020-10-28 00:32:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:14,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 00:32:14,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:15,102 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:32:15,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:15,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203025733] [2020-10-28 00:32:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:15,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:32:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736849282] [2020-10-28 00:32:15,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:32:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:32:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:32:15,169 INFO L87 Difference]: Start difference. First operand 20872 states and 31892 transitions. Second operand 4 states. [2020-10-28 00:32:18,601 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-28 00:32:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:20,962 INFO L93 Difference]: Finished difference Result 50256 states and 76740 transitions. [2020-10-28 00:32:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:20,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-10-28 00:32:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:21,009 INFO L225 Difference]: With dead ends: 50256 [2020-10-28 00:32:21,010 INFO L226 Difference]: Without dead ends: 29923 [2020-10-28 00:32:21,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29923 states. [2020-10-28 00:32:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29923 to 29896. [2020-10-28 00:32:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29896 states. [2020-10-28 00:32:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29896 states to 29896 states and 45014 transitions. [2020-10-28 00:32:22,879 INFO L78 Accepts]: Start accepts. Automaton has 29896 states and 45014 transitions. Word has length 162 [2020-10-28 00:32:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:22,879 INFO L481 AbstractCegarLoop]: Abstraction has 29896 states and 45014 transitions. [2020-10-28 00:32:22,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 29896 states and 45014 transitions. [2020-10-28 00:32:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 00:32:22,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:22,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:22,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:32:22,892 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1571405037, now seen corresponding path program 1 times [2020-10-28 00:32:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816566957] [2020-10-28 00:32:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:23,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:25,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:32:27,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:32:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 00:32:27,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:28,395 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:32:28,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:28,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:28,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:28,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:28,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816566957] [2020-10-28 00:32:28,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:28,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:32:28,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121881237] [2020-10-28 00:32:28,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:32:28,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:28,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:32:28,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:32:28,436 INFO L87 Difference]: Start difference. First operand 29896 states and 45014 transitions. Second operand 4 states. [2020-10-28 00:32:32,561 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-28 00:32:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:32:34,290 INFO L93 Difference]: Finished difference Result 80575 states and 122682 transitions. [2020-10-28 00:32:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:32:34,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-10-28 00:32:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:32:34,352 INFO L225 Difference]: With dead ends: 80575 [2020-10-28 00:32:34,353 INFO L226 Difference]: Without dead ends: 51495 [2020-10-28 00:32:34,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:32:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51495 states. [2020-10-28 00:32:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51495 to 46384. [2020-10-28 00:32:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46384 states. [2020-10-28 00:32:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46384 states to 46384 states and 71478 transitions. [2020-10-28 00:32:37,452 INFO L78 Accepts]: Start accepts. Automaton has 46384 states and 71478 transitions. Word has length 164 [2020-10-28 00:32:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:32:37,453 INFO L481 AbstractCegarLoop]: Abstraction has 46384 states and 71478 transitions. [2020-10-28 00:32:37,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:32:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 46384 states and 71478 transitions. [2020-10-28 00:32:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 00:32:37,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:32:37,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:32:37,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:32:37,465 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:32:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:32:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 268165092, now seen corresponding path program 1 times [2020-10-28 00:32:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:32:37,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323705462] [2020-10-28 00:32:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:32:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:37,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:38,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:32:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:32:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:32:42,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:43,018 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:32:43,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:32:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:32:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:32:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:32:43,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:32:43,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:32:43,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:32:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:32:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323705462] [2020-10-28 00:32:43,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:32:43,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:32:43,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961623835] [2020-10-28 00:32:43,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:32:43,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:32:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:32:43,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:32:43,065 INFO L87 Difference]: Start difference. First operand 46384 states and 71478 transitions. Second operand 7 states. [2020-10-28 00:32:43,563 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-28 00:32:47,218 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-28 00:32:47,690 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-28 00:32:48,191 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-28 00:32:48,660 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-28 00:32:49,109 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-28 00:32:49,572 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-28 00:32:50,451 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-28 00:33:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:33:01,372 INFO L93 Difference]: Finished difference Result 219154 states and 341688 transitions. [2020-10-28 00:33:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:33:01,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-10-28 00:33:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:33:01,791 INFO L225 Difference]: With dead ends: 219154 [2020-10-28 00:33:01,791 INFO L226 Difference]: Without dead ends: 177592 [2020-10-28 00:33:01,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:33:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177592 states. [2020-10-28 00:33:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177592 to 149001. [2020-10-28 00:33:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149001 states. [2020-10-28 00:33:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149001 states to 149001 states and 231311 transitions. [2020-10-28 00:33:13,220 INFO L78 Accepts]: Start accepts. Automaton has 149001 states and 231311 transitions. Word has length 167 [2020-10-28 00:33:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:33:13,220 INFO L481 AbstractCegarLoop]: Abstraction has 149001 states and 231311 transitions. [2020-10-28 00:33:13,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:33:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 149001 states and 231311 transitions. [2020-10-28 00:33:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 00:33:13,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:33:13,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:33:13,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:33:13,247 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:33:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:33:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash 777521993, now seen corresponding path program 1 times [2020-10-28 00:33:13,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:33:13,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579501373] [2020-10-28 00:33:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:33:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:14,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:14,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:15,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:16,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:16,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:33:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:18,824 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 00:33:18,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:33:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:33:18,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:33:18,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:33:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:33:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:33:18,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:33:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:33:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579501373] [2020-10-28 00:33:18,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:33:18,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:33:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402316134] [2020-10-28 00:33:18,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:33:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:33:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:33:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:33:18,881 INFO L87 Difference]: Start difference. First operand 149001 states and 231311 transitions. Second operand 5 states. [2020-10-28 00:33:23,653 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 238