/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.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:26:17,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:26:17,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:26:17,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:26:17,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:26:17,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:26:17,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:26:17,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:26:17,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:26:17,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:26:17,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:26:17,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:26:17,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:26:17,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:26:17,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:26:17,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:26:17,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:26:17,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:26:17,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:26:18,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:26:18,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:26:18,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:26:18,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:26:18,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:26:18,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:26:18,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:26:18,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:26:18,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:26:18,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:26:18,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:26:18,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:26:18,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:26:18,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:26:18,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:26:18,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:26:18,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:26:18,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:26:18,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:26:18,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:26:18,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:26:18,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:26:18,073 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 00:26:18,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:26:18,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:26:18,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:26:18,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:26:18,135 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:26:18,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:26:18,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:26:18,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:26:18,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:26:18,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:26:18,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:26:18,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:26:18,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:26:18,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:26:18,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:26:18,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:26:18,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:26:18,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:26:18,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:26:18,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:26:18,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:26:18,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:26:18,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:26:18,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:26:18,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:26:18,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:26:18,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:26:18,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:26:18,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:26:18,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:26:18,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:26:18,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:26:18,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:26:18,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:26:18,604 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:26:18,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:26:18,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b10fa957a/9055b00cc67246538d0d80d65a071223/FLAG9bf5518a9 [2020-10-28 00:26:19,309 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:26:19,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:26:19,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b10fa957a/9055b00cc67246538d0d80d65a071223/FLAG9bf5518a9 [2020-10-28 00:26:19,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b10fa957a/9055b00cc67246538d0d80d65a071223 [2020-10-28 00:26:19,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:26:19,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:26:19,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:19,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:26:19,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:26:19,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:19" (1/1) ... [2020-10-28 00:26:19,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a977fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:19, skipping insertion in model container [2020-10-28 00:26:19,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:19" (1/1) ... [2020-10-28 00:26:19,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:26:19,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:26:20,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:20,087 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:26:20,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:20,299 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:26:20,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20 WrapperNode [2020-10-28 00:26:20,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:20,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:26:20,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:26:20,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:26:20,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (1/1) ... [2020-10-28 00:26:20,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:26:20,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:26:20,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:26:20,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:26:20,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (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 00:26:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:26:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:26:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:26:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:26:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:26:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:26:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:26:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:26:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:26:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:26:20,500 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:26:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:26:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:26:22,074 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:26:22,074 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:26:22,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:22 BoogieIcfgContainer [2020-10-28 00:26:22,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:26:22,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:26:22,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:26:22,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:26:22,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:26:19" (1/3) ... [2020-10-28 00:26:22,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c7a3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:22, skipping insertion in model container [2020-10-28 00:26:22,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:20" (2/3) ... [2020-10-28 00:26:22,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c7a3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:22, skipping insertion in model container [2020-10-28 00:26:22,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:22" (3/3) ... [2020-10-28 00:26:22,087 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:26:22,097 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:26:22,103 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:26:22,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:26:22,151 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:26:22,151 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:26:22,151 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:26:22,152 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:26:22,152 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:26:22,152 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:26:22,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:26:22,152 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:26:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states. [2020-10-28 00:26:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:26:22,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:22,193 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] [2020-10-28 00:26:22,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1206189751, now seen corresponding path program 1 times [2020-10-28 00:26:22,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:22,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403053252] [2020-10-28 00:26:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:24,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:27,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:26:27,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:26:27,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:26:27,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:26:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:26:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:26:28,290 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:28,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:28,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:28,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:28,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:26:28,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:28,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:28,391 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 00:26:28,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403053252] [2020-10-28 00:26:28,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:28,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:28,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434910038] [2020-10-28 00:26:28,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:28,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:28,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:28,420 INFO L87 Difference]: Start difference. First operand 256 states. Second operand 5 states. [2020-10-28 00:26:30,715 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:26:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:32,048 INFO L93 Difference]: Finished difference Result 711 states and 1235 transitions. [2020-10-28 00:26:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:32,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-28 00:26:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:32,085 INFO L225 Difference]: With dead ends: 711 [2020-10-28 00:26:32,085 INFO L226 Difference]: Without dead ends: 476 [2020-10-28 00:26:32,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:26:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-28 00:26:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 473. [2020-10-28 00:26:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-28 00:26:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 695 transitions. [2020-10-28 00:26:32,255 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 695 transitions. Word has length 106 [2020-10-28 00:26:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:32,258 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 695 transitions. [2020-10-28 00:26:32,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 695 transitions. [2020-10-28 00:26:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:26:32,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:32,268 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] [2020-10-28 00:26:32,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:26:32,268 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash -259899678, now seen corresponding path program 1 times [2020-10-28 00:26:32,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:32,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289198913] [2020-10-28 00:26:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:32,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:37,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:26:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:26:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:26:37,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:26:37,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:26:37,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:26:37,810 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:37,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:37,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:37,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:37,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:26:37,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:37,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:37,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:37,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289198913] [2020-10-28 00:26:37,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:37,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017114123] [2020-10-28 00:26:37,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:37,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:37,886 INFO L87 Difference]: Start difference. First operand 473 states and 695 transitions. Second operand 4 states. [2020-10-28 00:26:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:40,509 INFO L93 Difference]: Finished difference Result 1371 states and 2012 transitions. [2020-10-28 00:26:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:26:40,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:26:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:40,518 INFO L225 Difference]: With dead ends: 1371 [2020-10-28 00:26:40,519 INFO L226 Difference]: Without dead ends: 930 [2020-10-28 00:26:40,523 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 00:26:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-10-28 00:26:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 475. [2020-10-28 00:26:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-10-28 00:26:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 697 transitions. [2020-10-28 00:26:40,579 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 697 transitions. Word has length 107 [2020-10-28 00:26:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:40,579 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 697 transitions. [2020-10-28 00:26:40,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 697 transitions. [2020-10-28 00:26:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:26:40,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:40,589 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] [2020-10-28 00:26:40,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:26:40,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash 885138356, now seen corresponding path program 1 times [2020-10-28 00:26:40,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:40,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833010560] [2020-10-28 00:26:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:40,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:45,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:45,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:45,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:26:45,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:26:45,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:46,069 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:46,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:46,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:46,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:46,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:26:46,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:46,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:46,153 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 00:26:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833010560] [2020-10-28 00:26:46,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:46,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:46,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008101185] [2020-10-28 00:26:46,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:46,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:46,157 INFO L87 Difference]: Start difference. First operand 475 states and 697 transitions. Second operand 4 states. [2020-10-28 00:26:47,936 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:26:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:48,952 INFO L93 Difference]: Finished difference Result 1190 states and 1760 transitions. [2020-10-28 00:26:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:48,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:26:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:48,960 INFO L225 Difference]: With dead ends: 1190 [2020-10-28 00:26:48,960 INFO L226 Difference]: Without dead ends: 912 [2020-10-28 00:26:48,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2020-10-28 00:26:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 909. [2020-10-28 00:26:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2020-10-28 00:26:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1325 transitions. [2020-10-28 00:26:49,043 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1325 transitions. Word has length 108 [2020-10-28 00:26:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:49,043 INFO L481 AbstractCegarLoop]: Abstraction has 909 states and 1325 transitions. [2020-10-28 00:26:49,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1325 transitions. [2020-10-28 00:26:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:26:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:49,047 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] [2020-10-28 00:26:49,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:26:49,047 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:49,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1583899857, now seen corresponding path program 1 times [2020-10-28 00:26:49,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:49,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900396117] [2020-10-28 00:26:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:52,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:52,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:54,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:26:54,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:26:54,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 00:26:54,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:54,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:54,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 00:26:54,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:26:54,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:54,613 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:54,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:54,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:54,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:54,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:54,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:54,671 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 00:26:54,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900396117] [2020-10-28 00:26:54,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:54,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006064959] [2020-10-28 00:26:54,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:54,673 INFO L87 Difference]: Start difference. First operand 909 states and 1325 transitions. Second operand 5 states. [2020-10-28 00:26:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:56,050 INFO L93 Difference]: Finished difference Result 1419 states and 2084 transitions. [2020-10-28 00:26:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:56,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-28 00:26:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:56,056 INFO L225 Difference]: With dead ends: 1419 [2020-10-28 00:26:56,056 INFO L226 Difference]: Without dead ends: 695 [2020-10-28 00:26:56,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-28 00:26:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2020-10-28 00:26:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 00:26:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1009 transitions. [2020-10-28 00:26:56,107 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1009 transitions. Word has length 108 [2020-10-28 00:26:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:56,108 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1009 transitions. [2020-10-28 00:26:56,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1009 transitions. [2020-10-28 00:26:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:26:56,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:56,110 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] [2020-10-28 00:26:56,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:26:56,111 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:56,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1320719686, now seen corresponding path program 1 times [2020-10-28 00:26:56,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:56,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861697235] [2020-10-28 00:26:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:01,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:27:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 00:27:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:01,565 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:01,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:27:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:01,631 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 00:27:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861697235] [2020-10-28 00:27:01,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:01,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:01,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844482319] [2020-10-28 00:27:01,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:01,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:01,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:01,634 INFO L87 Difference]: Start difference. First operand 695 states and 1009 transitions. Second operand 4 states. [2020-10-28 00:27:03,648 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:03,788 INFO L93 Difference]: Finished difference Result 1445 states and 2180 transitions. [2020-10-28 00:27:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:03,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:27:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:03,795 INFO L225 Difference]: With dead ends: 1445 [2020-10-28 00:27:03,795 INFO L226 Difference]: Without dead ends: 936 [2020-10-28 00:27:03,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2020-10-28 00:27:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 912. [2020-10-28 00:27:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 912 states. [2020-10-28 00:27:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1361 transitions. [2020-10-28 00:27:03,884 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1361 transitions. Word has length 108 [2020-10-28 00:27:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:03,885 INFO L481 AbstractCegarLoop]: Abstraction has 912 states and 1361 transitions. [2020-10-28 00:27:03,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1361 transitions. [2020-10-28 00:27:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 00:27:03,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:03,888 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] [2020-10-28 00:27:03,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:27:03,888 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1298441772, now seen corresponding path program 1 times [2020-10-28 00:27:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:03,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365857923] [2020-10-28 00:27:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:03,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:08,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 00:27:08,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:27:08,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:27:08,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:08,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:08,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:27:08,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:27:08,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:09,320 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:09,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:09,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:09,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:09,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:27:09,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:09,388 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 00:27:09,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365857923] [2020-10-28 00:27:09,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:09,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:09,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027367208] [2020-10-28 00:27:09,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:09,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:09,392 INFO L87 Difference]: Start difference. First operand 912 states and 1361 transitions. Second operand 4 states. [2020-10-28 00:27:10,998 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:11,447 INFO L93 Difference]: Finished difference Result 1983 states and 3073 transitions. [2020-10-28 00:27:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:11,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-28 00:27:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:11,455 INFO L225 Difference]: With dead ends: 1983 [2020-10-28 00:27:11,456 INFO L226 Difference]: Without dead ends: 1341 [2020-10-28 00:27:11,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-10-28 00:27:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1296. [2020-10-28 00:27:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-10-28 00:27:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1984 transitions. [2020-10-28 00:27:11,557 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1984 transitions. Word has length 110 [2020-10-28 00:27:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:11,557 INFO L481 AbstractCegarLoop]: Abstraction has 1296 states and 1984 transitions. [2020-10-28 00:27:11,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1984 transitions. [2020-10-28 00:27:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:27:11,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:11,560 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] [2020-10-28 00:27:11,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:27:11,560 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash 527422770, now seen corresponding path program 1 times [2020-10-28 00:27:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:11,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084683806] [2020-10-28 00:27:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:12,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:16,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:27:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:17,060 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:17,124 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 00:27:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084683806] [2020-10-28 00:27:17,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:17,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:17,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756614959] [2020-10-28 00:27:17,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:17,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:17,127 INFO L87 Difference]: Start difference. First operand 1296 states and 1984 transitions. Second operand 5 states. [2020-10-28 00:27:18,635 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:27:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:19,789 INFO L93 Difference]: Finished difference Result 3401 states and 5245 transitions. [2020-10-28 00:27:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:27:19,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-28 00:27:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:19,802 INFO L225 Difference]: With dead ends: 3401 [2020-10-28 00:27:19,802 INFO L226 Difference]: Without dead ends: 2375 [2020-10-28 00:27:19,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:27:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2020-10-28 00:27:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2372. [2020-10-28 00:27:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2020-10-28 00:27:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3593 transitions. [2020-10-28 00:27:20,013 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3593 transitions. Word has length 111 [2020-10-28 00:27:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:20,014 INFO L481 AbstractCegarLoop]: Abstraction has 2372 states and 3593 transitions. [2020-10-28 00:27:20,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3593 transitions. [2020-10-28 00:27:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:27:20,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:20,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:20,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:27:20,018 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:20,019 INFO L82 PathProgramCache]: Analyzing trace with hash 708692533, now seen corresponding path program 1 times [2020-10-28 00:27:20,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:20,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287404489] [2020-10-28 00:27:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:20,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:20,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:22,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:22,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:25,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:25,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:27:25,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:27:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:25,477 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:25,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:25,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:25,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:25,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:25,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:25,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:27:25,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:25,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:25,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:25,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:25,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:25,526 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 00:27:25,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287404489] [2020-10-28 00:27:25,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:25,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936378791] [2020-10-28 00:27:25,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:25,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:25,529 INFO L87 Difference]: Start difference. First operand 2372 states and 3593 transitions. Second operand 5 states. [2020-10-28 00:27:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:26,913 INFO L93 Difference]: Finished difference Result 4667 states and 7057 transitions. [2020-10-28 00:27:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:26,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-28 00:27:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:26,926 INFO L225 Difference]: With dead ends: 4667 [2020-10-28 00:27:26,926 INFO L226 Difference]: Without dead ends: 2372 [2020-10-28 00:27:26,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2020-10-28 00:27:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2372. [2020-10-28 00:27:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2020-10-28 00:27:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3581 transitions. [2020-10-28 00:27:27,125 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3581 transitions. Word has length 112 [2020-10-28 00:27:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:27,126 INFO L481 AbstractCegarLoop]: Abstraction has 2372 states and 3581 transitions. [2020-10-28 00:27:27,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3581 transitions. [2020-10-28 00:27:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 00:27:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:27,129 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] [2020-10-28 00:27:27,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:27:27,129 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1673308895, now seen corresponding path program 1 times [2020-10-28 00:27:27,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:27,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112376495] [2020-10-28 00:27:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:27,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:32,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 00:27:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:32,522 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:32,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:32,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:32,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:32,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:32,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:32,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:32,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:32,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:32,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:32,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:32,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:32,570 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 00:27:32,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112376495] [2020-10-28 00:27:32,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:32,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80180375] [2020-10-28 00:27:32,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:32,572 INFO L87 Difference]: Start difference. First operand 2372 states and 3581 transitions. Second operand 4 states. [2020-10-28 00:27:33,912 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:34,642 INFO L93 Difference]: Finished difference Result 5485 states and 8374 transitions. [2020-10-28 00:27:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:34,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-28 00:27:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:34,657 INFO L225 Difference]: With dead ends: 5485 [2020-10-28 00:27:34,658 INFO L226 Difference]: Without dead ends: 3531 [2020-10-28 00:27:34,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2020-10-28 00:27:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3528. [2020-10-28 00:27:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3528 states. [2020-10-28 00:27:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 5269 transitions. [2020-10-28 00:27:34,964 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 5269 transitions. Word has length 113 [2020-10-28 00:27:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:34,965 INFO L481 AbstractCegarLoop]: Abstraction has 3528 states and 5269 transitions. [2020-10-28 00:27:34,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 5269 transitions. [2020-10-28 00:27:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 00:27:34,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:34,969 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] [2020-10-28 00:27:34,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:27:34,969 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:34,970 INFO L82 PathProgramCache]: Analyzing trace with hash -740455803, now seen corresponding path program 1 times [2020-10-28 00:27:34,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264776387] [2020-10-28 00:27:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:39,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 00:27:39,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:27:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4943 [2020-10-28 00:27:39,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 00:27:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:27:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:40,336 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:40,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:40,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:40,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:40,372 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 00:27:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264776387] [2020-10-28 00:27:40,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:40,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:40,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898022513] [2020-10-28 00:27:40,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:40,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:40,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:40,374 INFO L87 Difference]: Start difference. First operand 3528 states and 5269 transitions. Second operand 4 states. [2020-10-28 00:27:42,235 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:42,674 INFO L93 Difference]: Finished difference Result 8511 states and 13140 transitions. [2020-10-28 00:27:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:42,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 00:27:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:42,701 INFO L225 Difference]: With dead ends: 8511 [2020-10-28 00:27:42,701 INFO L226 Difference]: Without dead ends: 5576 [2020-10-28 00:27:42,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2020-10-28 00:27:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5357. [2020-10-28 00:27:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5357 states. [2020-10-28 00:27:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 8208 transitions. [2020-10-28 00:27:43,199 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 8208 transitions. Word has length 115 [2020-10-28 00:27:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:43,199 INFO L481 AbstractCegarLoop]: Abstraction has 5357 states and 8208 transitions. [2020-10-28 00:27:43,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 8208 transitions. [2020-10-28 00:27:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 00:27:43,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:43,204 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] [2020-10-28 00:27:43,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:27:43,205 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:43,205 INFO L82 PathProgramCache]: Analyzing trace with hash -270634993, now seen corresponding path program 1 times [2020-10-28 00:27:43,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:43,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408415212] [2020-10-28 00:27:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:44,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:44,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:45,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:45,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:48,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:48,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 00:27:48,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:27:48,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:27:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:27:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 00:27:48,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:48,644 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:48,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:48,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:48,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:48,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:48,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:27:48,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:48,692 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 00:27:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408415212] [2020-10-28 00:27:48,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:27:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701077768] [2020-10-28 00:27:48,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:27:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:27:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:48,695 INFO L87 Difference]: Start difference. First operand 5357 states and 8208 transitions. Second operand 5 states. [2020-10-28 00:27:49,024 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:27:50,237 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:27:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:52,005 INFO L93 Difference]: Finished difference Result 18485 states and 29241 transitions. [2020-10-28 00:27:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:27:52,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-28 00:27:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:52,057 INFO L225 Difference]: With dead ends: 18485 [2020-10-28 00:27:52,057 INFO L226 Difference]: Without dead ends: 14045 [2020-10-28 00:27:52,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:27:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2020-10-28 00:27:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14039. [2020-10-28 00:27:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14039 states. [2020-10-28 00:27:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14039 states to 14039 states and 22061 transitions. [2020-10-28 00:27:53,079 INFO L78 Accepts]: Start accepts. Automaton has 14039 states and 22061 transitions. Word has length 116 [2020-10-28 00:27:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:53,079 INFO L481 AbstractCegarLoop]: Abstraction has 14039 states and 22061 transitions. [2020-10-28 00:27:53,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14039 states and 22061 transitions. [2020-10-28 00:27:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 00:27:53,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:53,084 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] [2020-10-28 00:27:53,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:27:53,085 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1909580870, now seen corresponding path program 1 times [2020-10-28 00:27:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:53,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763173480] [2020-10-28 00:27:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:53,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:53,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:53,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:53,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:58,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:58,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:27:58,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:27:58,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:58,500 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:58,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:58,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:58,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:58,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:58,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:58,548 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 00:27:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763173480] [2020-10-28 00:27:58,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:58,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161558377] [2020-10-28 00:27:58,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:58,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:58,550 INFO L87 Difference]: Start difference. First operand 14039 states and 22061 transitions. Second operand 4 states. [2020-10-28 00:27:58,930 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:02,262 INFO L93 Difference]: Finished difference Result 39263 states and 62675 transitions. [2020-10-28 00:28:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:02,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 00:28:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:02,337 INFO L225 Difference]: With dead ends: 39263 [2020-10-28 00:28:02,337 INFO L226 Difference]: Without dead ends: 26651 [2020-10-28 00:28:02,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2020-10-28 00:28:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 26614. [2020-10-28 00:28:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26614 states. [2020-10-28 00:28:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26614 states to 26614 states and 41711 transitions. [2020-10-28 00:28:04,219 INFO L78 Accepts]: Start accepts. Automaton has 26614 states and 41711 transitions. Word has length 116 [2020-10-28 00:28:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 26614 states and 41711 transitions. [2020-10-28 00:28:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 26614 states and 41711 transitions. [2020-10-28 00:28:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 00:28:04,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:04,223 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] [2020-10-28 00:28:04,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:28:04,223 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1884851697, now seen corresponding path program 1 times [2020-10-28 00:28:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:04,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639516135] [2020-10-28 00:28:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:05,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:06,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:09,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:09,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 00:28:09,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:28:09,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:28:09,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:09,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:28:09,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 00:28:09,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:09,708 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:09,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:09,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:09,767 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 00:28:09,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639516135] [2020-10-28 00:28:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:09,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715481312] [2020-10-28 00:28:09,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:09,770 INFO L87 Difference]: Start difference. First operand 26614 states and 41711 transitions. Second operand 5 states. [2020-10-28 00:28:11,287 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:13,802 INFO L93 Difference]: Finished difference Result 51531 states and 80716 transitions. [2020-10-28 00:28:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:28:13,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-28 00:28:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:13,871 INFO L225 Difference]: With dead ends: 51531 [2020-10-28 00:28:13,872 INFO L226 Difference]: Without dead ends: 25080 [2020-10-28 00:28:13,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:28:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25080 states. [2020-10-28 00:28:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25080 to 24866. [2020-10-28 00:28:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24866 states. [2020-10-28 00:28:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24866 states to 24866 states and 38972 transitions. [2020-10-28 00:28:15,825 INFO L78 Accepts]: Start accepts. Automaton has 24866 states and 38972 transitions. Word has length 116 [2020-10-28 00:28:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:15,825 INFO L481 AbstractCegarLoop]: Abstraction has 24866 states and 38972 transitions. [2020-10-28 00:28:15,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24866 states and 38972 transitions. [2020-10-28 00:28:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:28:15,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:15,828 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] [2020-10-28 00:28:15,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:28:15,830 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:15,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1526866387, now seen corresponding path program 1 times [2020-10-28 00:28:15,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:15,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071483807] [2020-10-28 00:28:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:15,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:15,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:20,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:20,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:28:20,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:20,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 00:28:20,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:20,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:20,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:28:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:28:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:21,270 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:21,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:21,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:21,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:21,388 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 00:28:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071483807] [2020-10-28 00:28:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:21,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937654729] [2020-10-28 00:28:21,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:21,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:21,391 INFO L87 Difference]: Start difference. First operand 24866 states and 38972 transitions. Second operand 5 states. [2020-10-28 00:28:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:24,047 INFO L93 Difference]: Finished difference Result 37270 states and 58407 transitions. [2020-10-28 00:28:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:24,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 00:28:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:24,096 INFO L225 Difference]: With dead ends: 37270 [2020-10-28 00:28:24,096 INFO L226 Difference]: Without dead ends: 24866 [2020-10-28 00:28:24,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24866 states. [2020-10-28 00:28:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24866 to 24866. [2020-10-28 00:28:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24866 states. [2020-10-28 00:28:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24866 states to 24866 states and 38971 transitions. [2020-10-28 00:28:26,013 INFO L78 Accepts]: Start accepts. Automaton has 24866 states and 38971 transitions. Word has length 117 [2020-10-28 00:28:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:26,013 INFO L481 AbstractCegarLoop]: Abstraction has 24866 states and 38971 transitions. [2020-10-28 00:28:26,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24866 states and 38971 transitions. [2020-10-28 00:28:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 00:28:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:26,016 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] [2020-10-28 00:28:26,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:28:26,017 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1603480123, now seen corresponding path program 1 times [2020-10-28 00:28:26,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:26,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7436156] [2020-10-28 00:28:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:28,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:28,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 00:28:28,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:28:28,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2833 [2020-10-28 00:28:28,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:28:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 00:28:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:29,306 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:29,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:29,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:29,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:29,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:29,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:29,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:29,359 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 00:28:29,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7436156] [2020-10-28 00:28:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:29,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274283788] [2020-10-28 00:28:29,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:29,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:29,361 INFO L87 Difference]: Start difference. First operand 24866 states and 38971 transitions. Second operand 5 states. [2020-10-28 00:28:30,868 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:28:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:34,424 INFO L93 Difference]: Finished difference Result 64530 states and 101046 transitions. [2020-10-28 00:28:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:28:34,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-28 00:28:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:34,500 INFO L225 Difference]: With dead ends: 64530 [2020-10-28 00:28:34,500 INFO L226 Difference]: Without dead ends: 39691 [2020-10-28 00:28:34,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:28:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39691 states. [2020-10-28 00:28:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39691 to 39688. [2020-10-28 00:28:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39688 states. [2020-10-28 00:28:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39688 states to 39688 states and 61510 transitions. [2020-10-28 00:28:38,010 INFO L78 Accepts]: Start accepts. Automaton has 39688 states and 61510 transitions. Word has length 118 [2020-10-28 00:28:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:38,010 INFO L481 AbstractCegarLoop]: Abstraction has 39688 states and 61510 transitions. [2020-10-28 00:28:38,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 39688 states and 61510 transitions. [2020-10-28 00:28:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 00:28:38,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:38,013 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] [2020-10-28 00:28:38,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:28:38,014 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1448695154, now seen corresponding path program 1 times [2020-10-28 00:28:38,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:38,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198566809] [2020-10-28 00:28:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:38,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:43,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:28:43,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:28:43,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:43,497 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:43,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:43,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:43,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:43,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:43,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:43,543 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 00:28:43,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198566809] [2020-10-28 00:28:43,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:43,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:43,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802002021] [2020-10-28 00:28:43,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:43,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:43,545 INFO L87 Difference]: Start difference. First operand 39688 states and 61510 transitions. Second operand 5 states. [2020-10-28 00:28:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:47,497 INFO L93 Difference]: Finished difference Result 70233 states and 108837 transitions. [2020-10-28 00:28:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:47,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 00:28:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:47,558 INFO L225 Difference]: With dead ends: 70233 [2020-10-28 00:28:47,558 INFO L226 Difference]: Without dead ends: 39688 [2020-10-28 00:28:47,588 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 00:28:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39688 states. [2020-10-28 00:28:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39688 to 39688. [2020-10-28 00:28:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39688 states. [2020-10-28 00:28:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39688 states to 39688 states and 61508 transitions. [2020-10-28 00:28:50,614 INFO L78 Accepts]: Start accepts. Automaton has 39688 states and 61508 transitions. Word has length 119 [2020-10-28 00:28:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:50,615 INFO L481 AbstractCegarLoop]: Abstraction has 39688 states and 61508 transitions. [2020-10-28 00:28:50,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 39688 states and 61508 transitions. [2020-10-28 00:28:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 00:28:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:50,619 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] [2020-10-28 00:28:50,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:28:50,619 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:50,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1993449007, now seen corresponding path program 1 times [2020-10-28 00:28:50,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:50,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803551645] [2020-10-28 00:28:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:52,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1863 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:28:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:52,892 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:52,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:52,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:52,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:52,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:52,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:28:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:52,932 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 00:28:52,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803551645] [2020-10-28 00:28:52,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:52,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:52,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647177607] [2020-10-28 00:28:52,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:52,934 INFO L87 Difference]: Start difference. First operand 39688 states and 61508 transitions. Second operand 4 states. [2020-10-28 00:28:54,743 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:28:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:59,726 INFO L93 Difference]: Finished difference Result 97953 states and 151916 transitions. [2020-10-28 00:28:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:59,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-10-28 00:28:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:59,812 INFO L225 Difference]: With dead ends: 97953 [2020-10-28 00:28:59,812 INFO L226 Difference]: Without dead ends: 59195 [2020-10-28 00:28:59,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59195 states. [2020-10-28 00:29:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59195 to 59192. [2020-10-28 00:29:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59192 states. [2020-10-28 00:29:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59192 states to 59192 states and 90544 transitions. [2020-10-28 00:29:04,511 INFO L78 Accepts]: Start accepts. Automaton has 59192 states and 90544 transitions. Word has length 120 [2020-10-28 00:29:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:04,511 INFO L481 AbstractCegarLoop]: Abstraction has 59192 states and 90544 transitions. [2020-10-28 00:29:04,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 59192 states and 90544 transitions. [2020-10-28 00:29:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 00:29:04,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:04,515 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] [2020-10-28 00:29:04,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:29:04,515 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:04,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1778225818, now seen corresponding path program 1 times [2020-10-28 00:29:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:04,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103222986] [2020-10-28 00:29:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:04,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:06,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1831 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 00:29:06,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:06,820 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:29:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:06,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:06,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:06,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:06,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:06,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:06,860 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 00:29:06,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103222986] [2020-10-28 00:29:06,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:06,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:06,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530028011] [2020-10-28 00:29:06,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:06,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:06,862 INFO L87 Difference]: Start difference. First operand 59192 states and 90544 transitions. Second operand 5 states. [2020-10-28 00:29:08,757 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:29:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:14,565 INFO L93 Difference]: Finished difference Result 102613 states and 157193 transitions. [2020-10-28 00:29:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:29:14,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-10-28 00:29:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:14,650 INFO L225 Difference]: With dead ends: 102613 [2020-10-28 00:29:14,651 INFO L226 Difference]: Without dead ends: 59494 [2020-10-28 00:29:14,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:29:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59494 states. [2020-10-28 00:29:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59494 to 59255. [2020-10-28 00:29:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59255 states. [2020-10-28 00:29:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59255 states to 59255 states and 90618 transitions. [2020-10-28 00:29:20,147 INFO L78 Accepts]: Start accepts. Automaton has 59255 states and 90618 transitions. Word has length 123 [2020-10-28 00:29:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:20,147 INFO L481 AbstractCegarLoop]: Abstraction has 59255 states and 90618 transitions. [2020-10-28 00:29:20,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:29:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 59255 states and 90618 transitions. [2020-10-28 00:29:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 00:29:20,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:20,151 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] [2020-10-28 00:29:20,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:29:20,152 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:20,152 INFO L82 PathProgramCache]: Analyzing trace with hash -984181644, now seen corresponding path program 1 times [2020-10-28 00:29:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:20,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215730596] [2020-10-28 00:29:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:29:21,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,949 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:29:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:21,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:21,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:21,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:29:21,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:21,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:21,991 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 00:29:21,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215730596] [2020-10-28 00:29:21,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:21,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:21,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625964847] [2020-10-28 00:29:21,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:21,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:21,994 INFO L87 Difference]: Start difference. First operand 59255 states and 90618 transitions. Second operand 5 states. [2020-10-28 00:29:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:28,117 INFO L93 Difference]: Finished difference Result 118451 states and 181148 transitions. [2020-10-28 00:29:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:29:28,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-28 00:29:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:28,204 INFO L225 Difference]: With dead ends: 118451 [2020-10-28 00:29:28,204 INFO L226 Difference]: Without dead ends: 59255 [2020-10-28 00:29:28,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59255 states. [2020-10-28 00:29:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59255 to 59251. [2020-10-28 00:29:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59251 states. [2020-10-28 00:29:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59251 states to 59251 states and 90604 transitions. [2020-10-28 00:29:33,904 INFO L78 Accepts]: Start accepts. Automaton has 59251 states and 90604 transitions. Word has length 124 [2020-10-28 00:29:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:33,904 INFO L481 AbstractCegarLoop]: Abstraction has 59251 states and 90604 transitions. [2020-10-28 00:29:33,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:29:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59251 states and 90604 transitions. [2020-10-28 00:29:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 00:29:33,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:33,909 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] [2020-10-28 00:29:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:29:33,909 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1345981831, now seen corresponding path program 1 times [2020-10-28 00:29:33,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:33,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328198644] [2020-10-28 00:29:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:33,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:34,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:29:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 00:29:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:35,141 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:29:35,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:35,197 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 00:29:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328198644] [2020-10-28 00:29:35,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:35,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52230625] [2020-10-28 00:29:35,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:35,200 INFO L87 Difference]: Start difference. First operand 59251 states and 90604 transitions. Second operand 5 states. [2020-10-28 00:29:36,880 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:29:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:42,653 INFO L93 Difference]: Finished difference Result 98310 states and 150408 transitions. [2020-10-28 00:29:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:29:42,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-28 00:29:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:42,746 INFO L225 Difference]: With dead ends: 98310 [2020-10-28 00:29:42,747 INFO L226 Difference]: Without dead ends: 54851 [2020-10-28 00:29:42,782 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 00:29:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54851 states.