/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:40:05,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:40:05,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:40:05,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:40:05,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:40:05,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:40:05,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:40:05,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:40:05,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:40:05,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:40:05,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:40:05,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:40:05,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:40:05,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:40:05,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:40:05,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:40:05,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:40:05,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:40:05,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:40:05,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:40:05,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:40:05,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:40:06,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:40:06,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:40:06,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:40:06,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:40:06,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:40:06,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:40:06,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:40:06,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:40:06,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:40:06,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:40:06,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:40:06,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:40:06,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:40:06,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:40:06,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:40:06,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:40:06,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:40:06,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:40:06,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:40:06,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:40:06,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:40:06,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:40:06,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:40:06,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:40:06,106 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:40:06,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:40:06,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:40:06,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:40:06,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:40:06,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:40:06,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:40:06,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:40:06,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:40:06,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:40:06,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:40:06,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:40:06,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:40:06,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:40:06,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:40:06,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:40:06,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:40:06,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:40:06,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:40:06,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:40:06,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:40:06,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:40:06,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:40:06,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:40:06,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:40:06,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:40:06,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:40:06,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:40:06,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:40:06,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:40:06,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:40:06,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 23:40:06,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a7a9c7f7/9d6ee53038a248d08d30240d6ea7a10f/FLAGf1202ce76 [2020-10-27 23:40:07,306 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:40:07,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 23:40:07,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a7a9c7f7/9d6ee53038a248d08d30240d6ea7a10f/FLAGf1202ce76 [2020-10-27 23:40:07,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a7a9c7f7/9d6ee53038a248d08d30240d6ea7a10f [2020-10-27 23:40:07,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:40:07,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:40:07,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:07,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:40:07,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:40:07,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:07" (1/1) ... [2020-10-27 23:40:07,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a72b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:07, skipping insertion in model container [2020-10-27 23:40:07,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:07" (1/1) ... [2020-10-27 23:40:07,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:40:07,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:40:08,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:08,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:40:08,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:08,309 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:40:08,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08 WrapperNode [2020-10-27 23:40:08,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:08,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:40:08,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:40:08,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:40:08,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... [2020-10-27 23:40:08,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:40:08,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:40:08,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:40:08,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:40:08,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:40:08,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:40:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:40:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:40:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:40:08,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:40:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:40:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:40:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:40:08,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:40:08,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:40:08,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:40:08,578 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:40:08,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:40:08,578 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:40:08,579 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:40:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:40:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:40:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:40:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:40:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:40:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:40:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:40:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:40:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:40:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:40:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:40:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:40:09,920 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:40:09,921 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:40:09,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:09 BoogieIcfgContainer [2020-10-27 23:40:09,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:40:09,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:40:09,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:40:09,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:40:09,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:40:07" (1/3) ... [2020-10-27 23:40:09,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97c9d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:09, skipping insertion in model container [2020-10-27 23:40:09,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:08" (2/3) ... [2020-10-27 23:40:09,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97c9d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:09, skipping insertion in model container [2020-10-27 23:40:09,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:09" (3/3) ... [2020-10-27 23:40:09,934 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-27 23:40:09,947 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:40:09,953 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:40:09,968 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:40:09,999 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:40:09,999 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:40:09,999 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:40:09,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:40:09,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:40:10,000 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:40:10,000 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:40:10,000 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:40:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states. [2020-10-27 23:40:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:10,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:10,041 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] [2020-10-27 23:40:10,042 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -439108496, now seen corresponding path program 1 times [2020-10-27 23:40:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:10,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466097684] [2020-10-27 23:40:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:10,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:13,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:13,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:14,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:14,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:15,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:15,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:15,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:40:15,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:40:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:40:15,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:40:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:40:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:40:15,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:40:16,097 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:40:16,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:16,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:16,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:16,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:16,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:40:16,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:16,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466097684] [2020-10-27 23:40:16,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:16,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:40:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661315374] [2020-10-27 23:40:16,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:40:16,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:40:16,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:40:16,226 INFO L87 Difference]: Start difference. First operand 288 states. Second operand 10 states. [2020-10-27 23:40:16,648 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:19,393 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:40:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:19,913 INFO L93 Difference]: Finished difference Result 467 states and 765 transitions. [2020-10-27 23:40:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:40:19,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:40:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:19,945 INFO L225 Difference]: With dead ends: 467 [2020-10-27 23:40:19,947 INFO L226 Difference]: Without dead ends: 377 [2020-10-27 23:40:19,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:40:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-27 23:40:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2020-10-27 23:40:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-27 23:40:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 349 transitions. [2020-10-27 23:40:20,076 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 349 transitions. Word has length 53 [2020-10-27 23:40:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:20,078 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 349 transitions. [2020-10-27 23:40:20,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:40:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 349 transitions. [2020-10-27 23:40:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:20,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:20,089 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] [2020-10-27 23:40:20,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:40:20,090 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1473566256, now seen corresponding path program 1 times [2020-10-27 23:40:20,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:20,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810236816] [2020-10-27 23:40:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:21,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:22,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:25,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:25,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:40:25,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:40:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:40:25,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:40:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:40:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:40:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:25,663 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:40:25,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:25,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:25,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:25,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:25,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 23:40:25,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:25,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:25,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:25,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810236816] [2020-10-27 23:40:25,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:25,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:40:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962713945] [2020-10-27 23:40:25,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:40:25,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:40:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:40:25,767 INFO L87 Difference]: Start difference. First operand 280 states and 349 transitions. Second operand 6 states. [2020-10-27 23:40:26,168 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:27,722 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:40:28,302 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:29,120 INFO L93 Difference]: Finished difference Result 740 states and 1007 transitions. [2020-10-27 23:40:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:40:29,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:40:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:29,127 INFO L225 Difference]: With dead ends: 740 [2020-10-27 23:40:29,127 INFO L226 Difference]: Without dead ends: 691 [2020-10-27 23:40:29,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:40:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-10-27 23:40:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 454. [2020-10-27 23:40:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-27 23:40:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 601 transitions. [2020-10-27 23:40:29,166 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 601 transitions. Word has length 53 [2020-10-27 23:40:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:29,166 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 601 transitions. [2020-10-27 23:40:29,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:40:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 601 transitions. [2020-10-27 23:40:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:29,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:29,169 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] [2020-10-27 23:40:29,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:40:29,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -125995283, now seen corresponding path program 1 times [2020-10-27 23:40:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366178748] [2020-10-27 23:40:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:29,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:29,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:31,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:34,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:34,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:40:34,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:40:34,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:40:34,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:34,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:40:34,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:40:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:40:34,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:34,627 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:40:34,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:34,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:34,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:34,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:40:34,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:34,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366178748] [2020-10-27 23:40:34,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:34,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:40:34,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955305294] [2020-10-27 23:40:34,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:40:34,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:40:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:40:34,681 INFO L87 Difference]: Start difference. First operand 454 states and 601 transitions. Second operand 7 states. [2020-10-27 23:40:35,153 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:36,654 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:40:37,093 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:37,607 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:40:38,046 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:39,038 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:40:39,451 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:39,997 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 23:40:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:40,035 INFO L93 Difference]: Finished difference Result 2009 states and 2912 transitions. [2020-10-27 23:40:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:40:40,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 23:40:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:40,051 INFO L225 Difference]: With dead ends: 2009 [2020-10-27 23:40:40,051 INFO L226 Difference]: Without dead ends: 1785 [2020-10-27 23:40:40,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:40:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-10-27 23:40:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 824. [2020-10-27 23:40:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-10-27 23:40:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1154 transitions. [2020-10-27 23:40:40,137 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1154 transitions. Word has length 53 [2020-10-27 23:40:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:40,141 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1154 transitions. [2020-10-27 23:40:40,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:40:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1154 transitions. [2020-10-27 23:40:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:40,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:40,146 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] [2020-10-27 23:40:40,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:40:40,147 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash -199361388, now seen corresponding path program 1 times [2020-10-27 23:40:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:40,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142592685] [2020-10-27 23:40:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:44,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:45,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:45,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:40:45,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:40:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:40:45,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:40:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:40:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:40:45,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:45,637 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:40:45,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:45,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:45,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:45,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:45,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:45,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142592685] [2020-10-27 23:40:45,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:45,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:40:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140912382] [2020-10-27 23:40:45,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:40:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:40:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:40:45,677 INFO L87 Difference]: Start difference. First operand 824 states and 1154 transitions. Second operand 6 states. [2020-10-27 23:40:46,105 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:47,525 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:40:48,047 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:48,395 INFO L93 Difference]: Finished difference Result 896 states and 1225 transitions. [2020-10-27 23:40:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:40:48,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:40:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:48,401 INFO L225 Difference]: With dead ends: 896 [2020-10-27 23:40:48,402 INFO L226 Difference]: Without dead ends: 891 [2020-10-27 23:40:48,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:40:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-27 23:40:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 828. [2020-10-27 23:40:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-10-27 23:40:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1160 transitions. [2020-10-27 23:40:48,458 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1160 transitions. Word has length 53 [2020-10-27 23:40:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:48,459 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1160 transitions. [2020-10-27 23:40:48,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:40:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1160 transitions. [2020-10-27 23:40:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:48,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:48,463 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] [2020-10-27 23:40:48,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:40:48,464 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1898743687, now seen corresponding path program 1 times [2020-10-27 23:40:48,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:48,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144720793] [2020-10-27 23:40:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:48,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:49,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:49,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:53,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:40:53,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:40:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:54,051 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:40:54,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:54,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:54,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:54,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:54,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:40:54,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:54,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:54,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144720793] [2020-10-27 23:40:54,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:54,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:40:54,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506328689] [2020-10-27 23:40:54,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:40:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:40:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:40:54,121 INFO L87 Difference]: Start difference. First operand 828 states and 1160 transitions. Second operand 7 states. [2020-10-27 23:40:54,579 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:56,123 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:40:56,597 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:57,053 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:40:57,469 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:40:58,500 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:40:58,914 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:40:59,502 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 23:40:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:59,545 INFO L93 Difference]: Finished difference Result 2162 states and 3183 transitions. [2020-10-27 23:40:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:40:59,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 23:40:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:59,556 INFO L225 Difference]: With dead ends: 2162 [2020-10-27 23:40:59,556 INFO L226 Difference]: Without dead ends: 1756 [2020-10-27 23:40:59,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:40:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2020-10-27 23:40:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 792. [2020-10-27 23:40:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-10-27 23:40:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1112 transitions. [2020-10-27 23:40:59,618 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1112 transitions. Word has length 53 [2020-10-27 23:40:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:59,619 INFO L481 AbstractCegarLoop]: Abstraction has 792 states and 1112 transitions. [2020-10-27 23:40:59,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:40:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1112 transitions. [2020-10-27 23:40:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:59,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:59,620 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] [2020-10-27 23:40:59,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:40:59,621 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash -381441494, now seen corresponding path program 1 times [2020-10-27 23:40:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:59,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669996031] [2020-10-27 23:40:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:00,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:41:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:05,170 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:05,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:05,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:05,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:05,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:41:05,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:05,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669996031] [2020-10-27 23:41:05,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:05,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980331518] [2020-10-27 23:41:05,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:05,230 INFO L87 Difference]: Start difference. First operand 792 states and 1112 transitions. Second operand 6 states. [2020-10-27 23:41:05,677 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:07,129 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:41:07,586 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:08,151 INFO L93 Difference]: Finished difference Result 1542 states and 2229 transitions. [2020-10-27 23:41:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:41:08,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:41:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:08,160 INFO L225 Difference]: With dead ends: 1542 [2020-10-27 23:41:08,160 INFO L226 Difference]: Without dead ends: 1371 [2020-10-27 23:41:08,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-10-27 23:41:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1115. [2020-10-27 23:41:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2020-10-27 23:41:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1602 transitions. [2020-10-27 23:41:08,233 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1602 transitions. Word has length 53 [2020-10-27 23:41:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:08,233 INFO L481 AbstractCegarLoop]: Abstraction has 1115 states and 1602 transitions. [2020-10-27 23:41:08,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1602 transitions. [2020-10-27 23:41:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:08,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:08,235 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] [2020-10-27 23:41:08,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:08,235 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:08,236 INFO L82 PathProgramCache]: Analyzing trace with hash 258867246, now seen corresponding path program 1 times [2020-10-27 23:41:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436300105] [2020-10-27 23:41:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:41:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:13,747 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:13,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:13,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:13,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436300105] [2020-10-27 23:41:13,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:13,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005751374] [2020-10-27 23:41:13,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:13,808 INFO L87 Difference]: Start difference. First operand 1115 states and 1602 transitions. Second operand 6 states. [2020-10-27 23:41:14,226 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:15,581 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:41:16,041 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:16,977 INFO L93 Difference]: Finished difference Result 4263 states and 6392 transitions. [2020-10-27 23:41:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:41:16,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:41:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:16,995 INFO L225 Difference]: With dead ends: 4263 [2020-10-27 23:41:16,996 INFO L226 Difference]: Without dead ends: 3542 [2020-10-27 23:41:16,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2020-10-27 23:41:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3183. [2020-10-27 23:41:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-27 23:41:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4732 transitions. [2020-10-27 23:41:17,194 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4732 transitions. Word has length 55 [2020-10-27 23:41:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 3183 states and 4732 transitions. [2020-10-27 23:41:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4732 transitions. [2020-10-27 23:41:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:17,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:17,196 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] [2020-10-27 23:41:17,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:41:17,197 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1870976687, now seen corresponding path program 1 times [2020-10-27 23:41:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:17,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406826601] [2020-10-27 23:41:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:19,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:22,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:22,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:41:22,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:41:22,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:22,784 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:22,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:22,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:22,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:22,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406826601] [2020-10-27 23:41:22,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:22,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:22,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622430381] [2020-10-27 23:41:22,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:22,872 INFO L87 Difference]: Start difference. First operand 3183 states and 4732 transitions. Second operand 10 states. [2020-10-27 23:41:23,371 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:41:25,390 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:27,068 INFO L93 Difference]: Finished difference Result 8325 states and 12438 transitions. [2020-10-27 23:41:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 23:41:27,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:41:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:27,104 INFO L225 Difference]: With dead ends: 8325 [2020-10-27 23:41:27,105 INFO L226 Difference]: Without dead ends: 8318 [2020-10-27 23:41:27,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 23:41:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2020-10-27 23:41:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 3183. [2020-10-27 23:41:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-27 23:41:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4731 transitions. [2020-10-27 23:41:27,382 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4731 transitions. Word has length 55 [2020-10-27 23:41:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:27,383 INFO L481 AbstractCegarLoop]: Abstraction has 3183 states and 4731 transitions. [2020-10-27 23:41:27,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4731 transitions. [2020-10-27 23:41:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:27,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:27,385 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] [2020-10-27 23:41:27,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:41:27,385 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 746632852, now seen corresponding path program 1 times [2020-10-27 23:41:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427294150] [2020-10-27 23:41:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:32,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:32,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:41:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:41:32,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:41:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:32,982 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:32,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:33,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427294150] [2020-10-27 23:41:33,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:33,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:41:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423694900] [2020-10-27 23:41:33,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:41:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:41:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:41:33,014 INFO L87 Difference]: Start difference. First operand 3183 states and 4731 transitions. Second operand 11 states. [2020-10-27 23:41:34,169 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 237 [2020-10-27 23:41:36,176 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:41:36,608 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:37,111 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 23:41:38,632 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:41:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:39,216 INFO L93 Difference]: Finished difference Result 7528 states and 11165 transitions. [2020-10-27 23:41:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:41:39,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:41:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:39,247 INFO L225 Difference]: With dead ends: 7528 [2020-10-27 23:41:39,247 INFO L226 Difference]: Without dead ends: 7519 [2020-10-27 23:41:39,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:41:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2020-10-27 23:41:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 3183. [2020-10-27 23:41:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-27 23:41:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4729 transitions. [2020-10-27 23:41:39,586 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4729 transitions. Word has length 55 [2020-10-27 23:41:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:39,586 INFO L481 AbstractCegarLoop]: Abstraction has 3183 states and 4729 transitions. [2020-10-27 23:41:39,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:41:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4729 transitions. [2020-10-27 23:41:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:39,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:39,588 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] [2020-10-27 23:41:39,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:41:39,588 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1224223678, now seen corresponding path program 1 times [2020-10-27 23:41:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329359701] [2020-10-27 23:41:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:44,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:44,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:41:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:41:44,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:44,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:45,141 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:45,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:45,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:45,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:45,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:45,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329359701] [2020-10-27 23:41:45,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:45,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967179296] [2020-10-27 23:41:45,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:45,169 INFO L87 Difference]: Start difference. First operand 3183 states and 4729 transitions. Second operand 10 states. [2020-10-27 23:41:46,083 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 224 [2020-10-27 23:41:47,622 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:41:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:48,269 INFO L93 Difference]: Finished difference Result 4729 states and 7041 transitions. [2020-10-27 23:41:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:41:48,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:41:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:48,282 INFO L225 Difference]: With dead ends: 4729 [2020-10-27 23:41:48,282 INFO L226 Difference]: Without dead ends: 4724 [2020-10-27 23:41:48,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:41:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2020-10-27 23:41:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3183. [2020-10-27 23:41:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-27 23:41:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4729 transitions. [2020-10-27 23:41:48,565 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4729 transitions. Word has length 55 [2020-10-27 23:41:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:48,565 INFO L481 AbstractCegarLoop]: Abstraction has 3183 states and 4729 transitions. [2020-10-27 23:41:48,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4729 transitions. [2020-10-27 23:41:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:48,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:48,567 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] [2020-10-27 23:41:48,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:41:48,567 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1890648806, now seen corresponding path program 1 times [2020-10-27 23:41:48,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:48,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882506132] [2020-10-27 23:41:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:53,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:53,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:41:53,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,122 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:41:54,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:54,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:54,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:54,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:54,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:54,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882506132] [2020-10-27 23:41:54,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:54,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:41:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995020961] [2020-10-27 23:41:54,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:41:54,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:54,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:41:54,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:41:54,160 INFO L87 Difference]: Start difference. First operand 3183 states and 4729 transitions. Second operand 11 states. [2020-10-27 23:41:55,244 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2020-10-27 23:41:57,162 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 23:41:57,665 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:41:59,763 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 23:42:00,232 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-27 23:42:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:01,003 INFO L93 Difference]: Finished difference Result 12002 states and 17826 transitions. [2020-10-27 23:42:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 23:42:01,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:42:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:01,031 INFO L225 Difference]: With dead ends: 12002 [2020-10-27 23:42:01,031 INFO L226 Difference]: Without dead ends: 11995 [2020-10-27 23:42:01,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 23:42:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2020-10-27 23:42:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 3183. [2020-10-27 23:42:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2020-10-27 23:42:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4728 transitions. [2020-10-27 23:42:01,423 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4728 transitions. Word has length 55 [2020-10-27 23:42:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:01,424 INFO L481 AbstractCegarLoop]: Abstraction has 3183 states and 4728 transitions. [2020-10-27 23:42:01,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4728 transitions. [2020-10-27 23:42:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:01,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:01,426 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] [2020-10-27 23:42:01,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:01,426 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1919882281, now seen corresponding path program 1 times [2020-10-27 23:42:01,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:01,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342272249] [2020-10-27 23:42:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:06,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:42:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:06,962 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:06,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:06,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342272249] [2020-10-27 23:42:06,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:06,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:06,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122681156] [2020-10-27 23:42:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:06,990 INFO L87 Difference]: Start difference. First operand 3183 states and 4728 transitions. Second operand 10 states. [2020-10-27 23:42:07,393 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:42:08,793 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:42:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:09,486 INFO L93 Difference]: Finished difference Result 5343 states and 7996 transitions. [2020-10-27 23:42:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:09,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:42:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:09,498 INFO L225 Difference]: With dead ends: 5343 [2020-10-27 23:42:09,498 INFO L226 Difference]: Without dead ends: 4699 [2020-10-27 23:42:09,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:42:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2020-10-27 23:42:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 3171. [2020-10-27 23:42:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3171 states. [2020-10-27 23:42:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 4710 transitions. [2020-10-27 23:42:09,885 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 4710 transitions. Word has length 55 [2020-10-27 23:42:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:09,885 INFO L481 AbstractCegarLoop]: Abstraction has 3171 states and 4710 transitions. [2020-10-27 23:42:09,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 4710 transitions. [2020-10-27 23:42:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:09,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:09,887 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] [2020-10-27 23:42:09,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:09,887 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash -404927639, now seen corresponding path program 1 times [2020-10-27 23:42:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:09,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847564876] [2020-10-27 23:42:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:14,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:15,344 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:15,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:15,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:15,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847564876] [2020-10-27 23:42:15,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:15,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:15,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293704628] [2020-10-27 23:42:15,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:15,379 INFO L87 Difference]: Start difference. First operand 3171 states and 4710 transitions. Second operand 6 states. [2020-10-27 23:42:15,786 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:42:17,091 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:42:17,582 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:42:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:18,899 INFO L93 Difference]: Finished difference Result 5199 states and 7788 transitions. [2020-10-27 23:42:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:42:18,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:42:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:18,907 INFO L225 Difference]: With dead ends: 5199 [2020-10-27 23:42:18,908 INFO L226 Difference]: Without dead ends: 5189 [2020-10-27 23:42:18,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:42:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2020-10-27 23:42:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 3169. [2020-10-27 23:42:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3169 states. [2020-10-27 23:42:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4706 transitions. [2020-10-27 23:42:19,289 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4706 transitions. Word has length 55 [2020-10-27 23:42:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:19,289 INFO L481 AbstractCegarLoop]: Abstraction has 3169 states and 4706 transitions. [2020-10-27 23:42:19,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4706 transitions. [2020-10-27 23:42:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:19,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:19,291 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] [2020-10-27 23:42:19,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:42:19,291 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 135430019, now seen corresponding path program 1 times [2020-10-27 23:42:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:19,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717758687] [2020-10-27 23:42:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:24,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:42:24,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:24,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:42:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:24,825 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:24,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:24,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:24,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:24,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:24,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:24,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:24,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:24,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:24,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:24,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:24,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717758687] [2020-10-27 23:42:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:24,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003556986] [2020-10-27 23:42:24,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:24,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:24,855 INFO L87 Difference]: Start difference. First operand 3169 states and 4706 transitions. Second operand 10 states. [2020-10-27 23:42:25,416 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-27 23:42:27,022 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:42:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:27,626 INFO L93 Difference]: Finished difference Result 3888 states and 5775 transitions. [2020-10-27 23:42:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:42:27,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:42:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:27,632 INFO L225 Difference]: With dead ends: 3888 [2020-10-27 23:42:27,632 INFO L226 Difference]: Without dead ends: 3876 [2020-10-27 23:42:27,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2020-10-27 23:42:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3169. [2020-10-27 23:42:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3169 states. [2020-10-27 23:42:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4705 transitions. [2020-10-27 23:42:27,985 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4705 transitions. Word has length 55 [2020-10-27 23:42:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:27,986 INFO L481 AbstractCegarLoop]: Abstraction has 3169 states and 4705 transitions. [2020-10-27 23:42:27,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4705 transitions. [2020-10-27 23:42:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:42:27,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:27,988 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] [2020-10-27 23:42:27,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:42:27,988 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:27,988 INFO L82 PathProgramCache]: Analyzing trace with hash -295878213, now seen corresponding path program 1 times [2020-10-27 23:42:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198952033] [2020-10-27 23:42:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:28,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:33,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:33,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:33,537 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:33,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198952033] [2020-10-27 23:42:33,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:33,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038012380] [2020-10-27 23:42:33,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:33,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:33,574 INFO L87 Difference]: Start difference. First operand 3169 states and 4705 transitions. Second operand 10 states. [2020-10-27 23:42:34,005 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:42:35,513 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:42:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:36,356 INFO L93 Difference]: Finished difference Result 5323 states and 7967 transitions. [2020-10-27 23:42:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:36,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 23:42:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:36,364 INFO L225 Difference]: With dead ends: 5323 [2020-10-27 23:42:36,364 INFO L226 Difference]: Without dead ends: 4683 [2020-10-27 23:42:36,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-27 23:42:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2020-10-27 23:42:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 3168. [2020-10-27 23:42:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3168 states. [2020-10-27 23:42:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 4703 transitions. [2020-10-27 23:42:36,708 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 4703 transitions. Word has length 56 [2020-10-27 23:42:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:36,708 INFO L481 AbstractCegarLoop]: Abstraction has 3168 states and 4703 transitions. [2020-10-27 23:42:36,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 4703 transitions. [2020-10-27 23:42:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:36,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:36,709 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] [2020-10-27 23:42:36,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:42:36,710 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1178876852, now seen corresponding path program 1 times [2020-10-27 23:42:36,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:36,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212378280] [2020-10-27 23:42:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:42:37,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:42:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:38,109 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:38,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:38,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:38,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:38,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212378280] [2020-10-27 23:42:38,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:38,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179398471] [2020-10-27 23:42:38,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:38,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:38,137 INFO L87 Difference]: Start difference. First operand 3168 states and 4703 transitions. Second operand 9 states. [2020-10-27 23:42:38,584 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:42:40,049 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 23:42:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:40,648 INFO L93 Difference]: Finished difference Result 4069 states and 6072 transitions. [2020-10-27 23:42:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:40,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 23:42:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:40,653 INFO L225 Difference]: With dead ends: 4069 [2020-10-27 23:42:40,654 INFO L226 Difference]: Without dead ends: 4062 [2020-10-27 23:42:40,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:42:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2020-10-27 23:42:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 3163. [2020-10-27 23:42:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3163 states. [2020-10-27 23:42:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 4693 transitions. [2020-10-27 23:42:40,927 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 4693 transitions. Word has length 57 [2020-10-27 23:42:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:40,927 INFO L481 AbstractCegarLoop]: Abstraction has 3163 states and 4693 transitions. [2020-10-27 23:42:40,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 4693 transitions. [2020-10-27 23:42:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:40,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:40,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:42:40,929 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1023584559, now seen corresponding path program 1 times [2020-10-27 23:42:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:40,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715219808] [2020-10-27 23:42:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:40,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:42:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:42:41,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:42,130 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:42,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715219808] [2020-10-27 23:42:42,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:42,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:42,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472213678] [2020-10-27 23:42:42,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:42,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:42,158 INFO L87 Difference]: Start difference. First operand 3163 states and 4693 transitions. Second operand 9 states. [2020-10-27 23:42:42,604 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 23:42:44,066 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 23:42:45,159 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:42:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:45,408 INFO L93 Difference]: Finished difference Result 5020 states and 7514 transitions. [2020-10-27 23:42:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:45,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 23:42:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:45,414 INFO L225 Difference]: With dead ends: 5020 [2020-10-27 23:42:45,415 INFO L226 Difference]: Without dead ends: 4999 [2020-10-27 23:42:45,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 23:42:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2020-10-27 23:42:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 3144. [2020-10-27 23:42:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3144 states. [2020-10-27 23:42:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4668 transitions. [2020-10-27 23:42:45,719 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4668 transitions. Word has length 57 [2020-10-27 23:42:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:45,720 INFO L481 AbstractCegarLoop]: Abstraction has 3144 states and 4668 transitions. [2020-10-27 23:42:45,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4668 transitions. [2020-10-27 23:42:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:45,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:45,721 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] [2020-10-27 23:42:45,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:42:45,722 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:45,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2105554335, now seen corresponding path program 1 times [2020-10-27 23:42:45,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:45,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124737606] [2020-10-27 23:42:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3162 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:42:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:49,413 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:49,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:49,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:49,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:49,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:49,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:49,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124737606] [2020-10-27 23:42:49,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:49,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424187786] [2020-10-27 23:42:49,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:49,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:49,441 INFO L87 Difference]: Start difference. First operand 3144 states and 4668 transitions. Second operand 11 states. [2020-10-27 23:42:49,859 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:42:51,206 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 23:42:51,637 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:42:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:52,306 INFO L93 Difference]: Finished difference Result 4652 states and 6940 transitions. [2020-10-27 23:42:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:52,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 23:42:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:52,316 INFO L225 Difference]: With dead ends: 4652 [2020-10-27 23:42:52,316 INFO L226 Difference]: Without dead ends: 4644 [2020-10-27 23:42:52,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:42:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2020-10-27 23:42:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 3144. [2020-10-27 23:42:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3144 states. [2020-10-27 23:42:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4667 transitions. [2020-10-27 23:42:52,826 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4667 transitions. Word has length 57 [2020-10-27 23:42:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:52,826 INFO L481 AbstractCegarLoop]: Abstraction has 3144 states and 4667 transitions. [2020-10-27 23:42:52,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4667 transitions. [2020-10-27 23:42:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:52,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:52,828 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] [2020-10-27 23:42:52,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:42:52,829 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:52,829 INFO L82 PathProgramCache]: Analyzing trace with hash -493728345, now seen corresponding path program 1 times [2020-10-27 23:42:52,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:52,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290620475] [2020-10-27 23:42:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:42:57,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:42:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,382 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:42:58,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:58,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:58,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290620475] [2020-10-27 23:42:58,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:58,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:58,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842219168] [2020-10-27 23:42:58,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:58,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:58,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:58,412 INFO L87 Difference]: Start difference. First operand 3144 states and 4667 transitions. Second operand 10 states. [2020-10-27 23:42:58,966 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:43:00,422 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:43:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:01,024 INFO L93 Difference]: Finished difference Result 3854 states and 5729 transitions. [2020-10-27 23:43:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:43:01,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 23:43:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:01,028 INFO L225 Difference]: With dead ends: 3854 [2020-10-27 23:43:01,028 INFO L226 Difference]: Without dead ends: 3838 [2020-10-27 23:43:01,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:43:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3838 states. [2020-10-27 23:43:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3838 to 3144. [2020-10-27 23:43:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3144 states. [2020-10-27 23:43:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4666 transitions. [2020-10-27 23:43:01,300 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4666 transitions. Word has length 57 [2020-10-27 23:43:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:01,301 INFO L481 AbstractCegarLoop]: Abstraction has 3144 states and 4666 transitions. [2020-10-27 23:43:01,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4666 transitions. [2020-10-27 23:43:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:43:01,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:01,302 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] [2020-10-27 23:43:01,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:43:01,302 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash 996190440, now seen corresponding path program 1 times [2020-10-27 23:43:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:01,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498398527] [2020-10-27 23:43:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:43:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:01,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:02,599 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:02,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498398527] [2020-10-27 23:43:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:43:02,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603575173] [2020-10-27 23:43:02,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:43:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:43:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:43:02,639 INFO L87 Difference]: Start difference. First operand 3144 states and 4666 transitions. Second operand 8 states. [2020-10-27 23:43:03,622 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 233 [2020-10-27 23:43:04,885 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:43:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:05,845 INFO L93 Difference]: Finished difference Result 4387 states and 6556 transitions. [2020-10-27 23:43:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:43:05,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 23:43:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:05,849 INFO L225 Difference]: With dead ends: 4387 [2020-10-27 23:43:05,849 INFO L226 Difference]: Without dead ends: 4370 [2020-10-27 23:43:05,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2020-10-27 23:43:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3135. [2020-10-27 23:43:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3135 states. [2020-10-27 23:43:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4655 transitions. [2020-10-27 23:43:06,140 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4655 transitions. Word has length 57 [2020-10-27 23:43:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:06,140 INFO L481 AbstractCegarLoop]: Abstraction has 3135 states and 4655 transitions. [2020-10-27 23:43:06,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:43:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4655 transitions. [2020-10-27 23:43:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:43:06,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:06,142 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] [2020-10-27 23:43:06,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:43:06,142 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:06,143 INFO L82 PathProgramCache]: Analyzing trace with hash 380863726, now seen corresponding path program 1 times [2020-10-27 23:43:06,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:06,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390183925] [2020-10-27 23:43:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:11,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:11,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:43:11,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:11,724 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:11,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:11,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:11,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:11,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:11,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:11,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:11,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390183925] [2020-10-27 23:43:11,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:11,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:11,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251127878] [2020-10-27 23:43:11,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:11,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:11,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:11,753 INFO L87 Difference]: Start difference. First operand 3135 states and 4655 transitions. Second operand 10 states. [2020-10-27 23:43:12,181 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:43:13,636 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:43:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:14,214 INFO L93 Difference]: Finished difference Result 3825 states and 5695 transitions. [2020-10-27 23:43:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:14,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-27 23:43:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:14,220 INFO L225 Difference]: With dead ends: 3825 [2020-10-27 23:43:14,220 INFO L226 Difference]: Without dead ends: 3813 [2020-10-27 23:43:14,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:43:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2020-10-27 23:43:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3125. [2020-10-27 23:43:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3125 states. [2020-10-27 23:43:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4644 transitions. [2020-10-27 23:43:14,523 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4644 transitions. Word has length 58 [2020-10-27 23:43:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:14,523 INFO L481 AbstractCegarLoop]: Abstraction has 3125 states and 4644 transitions. [2020-10-27 23:43:14,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4644 transitions. [2020-10-27 23:43:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 23:43:14,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:14,524 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] [2020-10-27 23:43:14,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 23:43:14,524 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1782412450, now seen corresponding path program 1 times [2020-10-27 23:43:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:14,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808130095] [2020-10-27 23:43:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:43:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,168 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:17,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:17,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:17,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:17,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:17,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808130095] [2020-10-27 23:43:17,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:17,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:43:17,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853124575] [2020-10-27 23:43:17,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:43:17,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:43:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:43:17,197 INFO L87 Difference]: Start difference. First operand 3125 states and 4644 transitions. Second operand 12 states. [2020-10-27 23:43:17,728 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:43:19,415 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:43:19,883 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:43:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:20,936 INFO L93 Difference]: Finished difference Result 4845 states and 7192 transitions. [2020-10-27 23:43:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:43:20,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 23:43:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:20,944 INFO L225 Difference]: With dead ends: 4845 [2020-10-27 23:43:20,944 INFO L226 Difference]: Without dead ends: 4836 [2020-10-27 23:43:20,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-27 23:43:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2020-10-27 23:43:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3130. [2020-10-27 23:43:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3130 states. [2020-10-27 23:43:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4649 transitions. [2020-10-27 23:43:21,304 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4649 transitions. Word has length 59 [2020-10-27 23:43:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:21,305 INFO L481 AbstractCegarLoop]: Abstraction has 3130 states and 4649 transitions. [2020-10-27 23:43:21,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:43:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4649 transitions. [2020-10-27 23:43:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:43:21,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:21,306 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] [2020-10-27 23:43:21,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 23:43:21,306 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1018007670, now seen corresponding path program 1 times [2020-10-27 23:43:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:21,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10303307] [2020-10-27 23:43:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:21,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:43:24,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:43:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3340 [2020-10-27 23:43:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:43:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:43:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:25,101 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:25,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10303307] [2020-10-27 23:43:25,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:25,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:43:25,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474164157] [2020-10-27 23:43:25,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:43:25,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:43:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:43:25,140 INFO L87 Difference]: Start difference. First operand 3130 states and 4649 transitions. Second operand 8 states. [2020-10-27 23:43:25,611 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:43:27,064 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:43:27,899 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:43:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:28,086 INFO L93 Difference]: Finished difference Result 4077 states and 6062 transitions. [2020-10-27 23:43:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:43:28,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 23:43:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:28,091 INFO L225 Difference]: With dead ends: 4077 [2020-10-27 23:43:28,091 INFO L226 Difference]: Without dead ends: 4068 [2020-10-27 23:43:28,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 23:43:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2020-10-27 23:43:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3125. [2020-10-27 23:43:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3125 states. [2020-10-27 23:43:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4643 transitions. [2020-10-27 23:43:28,448 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4643 transitions. Word has length 60 [2020-10-27 23:43:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 3125 states and 4643 transitions. [2020-10-27 23:43:28,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:43:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4643 transitions. [2020-10-27 23:43:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 23:43:28,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:28,450 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] [2020-10-27 23:43:28,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 23:43:28,450 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1346588509, now seen corresponding path program 1 times [2020-10-27 23:43:28,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:28,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958863017] [2020-10-27 23:43:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:29,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 23:43:29,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:43:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 23:43:29,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 23:43:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,083 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:30,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:30,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:30,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958863017] [2020-10-27 23:43:30,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:30,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:30,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808145463] [2020-10-27 23:43:30,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:30,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:30,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:30,125 INFO L87 Difference]: Start difference. First operand 3125 states and 4643 transitions. Second operand 11 states. [2020-10-27 23:43:30,564 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:43:32,013 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 23:43:32,920 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:43:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:33,196 INFO L93 Difference]: Finished difference Result 4627 states and 6909 transitions. [2020-10-27 23:43:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:33,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-27 23:43:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:33,201 INFO L225 Difference]: With dead ends: 4627 [2020-10-27 23:43:33,201 INFO L226 Difference]: Without dead ends: 4617 [2020-10-27 23:43:33,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:43:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2020-10-27 23:43:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 3125. [2020-10-27 23:43:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3125 states. [2020-10-27 23:43:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4642 transitions. [2020-10-27 23:43:33,543 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4642 transitions. Word has length 61 [2020-10-27 23:43:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:33,543 INFO L481 AbstractCegarLoop]: Abstraction has 3125 states and 4642 transitions. [2020-10-27 23:43:33,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4642 transitions. [2020-10-27 23:43:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 23:43:33,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:33,545 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] [2020-10-27 23:43:33,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 23:43:33,545 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:33,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1050912474, now seen corresponding path program 1 times [2020-10-27 23:43:33,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:33,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242716256] [2020-10-27 23:43:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 23:43:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 23:43:33,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:43:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:43:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:34,249 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:34,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:34,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:34,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242716256] [2020-10-27 23:43:34,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:34,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:43:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009900666] [2020-10-27 23:43:34,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:43:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:43:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:43:34,278 INFO L87 Difference]: Start difference. First operand 3125 states and 4642 transitions. Second operand 8 states. [2020-10-27 23:43:34,728 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:43:36,606 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:43:37,064 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 23:43:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:37,492 INFO L93 Difference]: Finished difference Result 4830 states and 7246 transitions. [2020-10-27 23:43:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:43:37,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-27 23:43:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:37,497 INFO L225 Difference]: With dead ends: 4830 [2020-10-27 23:43:37,497 INFO L226 Difference]: Without dead ends: 4809 [2020-10-27 23:43:37,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:43:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2020-10-27 23:43:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 3106. [2020-10-27 23:43:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3106 states. [2020-10-27 23:43:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 4621 transitions. [2020-10-27 23:43:37,844 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 4621 transitions. Word has length 62 [2020-10-27 23:43:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:37,845 INFO L481 AbstractCegarLoop]: Abstraction has 3106 states and 4621 transitions. [2020-10-27 23:43:37,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:43:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 4621 transitions. [2020-10-27 23:43:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:43:37,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:37,849 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] [2020-10-27 23:43:37,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 23:43:37,849 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1294568504, now seen corresponding path program 1 times [2020-10-27 23:43:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287193550] [2020-10-27 23:43:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:42,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:43:42,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:43:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:43,279 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:43,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:43,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:43,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:43,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:43,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:43,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:43,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:43,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:43,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287193550] [2020-10-27 23:43:43,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:43,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:43:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620014409] [2020-10-27 23:43:43,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:43:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:43:43,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:43:43,310 INFO L87 Difference]: Start difference. First operand 3106 states and 4621 transitions. Second operand 4 states. [2020-10-27 23:43:43,726 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 23:43:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:45,138 INFO L93 Difference]: Finished difference Result 8566 states and 13035 transitions. [2020-10-27 23:43:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:43:45,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 23:43:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:45,145 INFO L225 Difference]: With dead ends: 8566 [2020-10-27 23:43:45,145 INFO L226 Difference]: Without dead ends: 5836 [2020-10-27 23:43:45,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:43:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2020-10-27 23:43:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 5833. [2020-10-27 23:43:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5833 states. [2020-10-27 23:43:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 8686 transitions. [2020-10-27 23:43:45,881 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 8686 transitions. Word has length 72 [2020-10-27 23:43:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:45,882 INFO L481 AbstractCegarLoop]: Abstraction has 5833 states and 8686 transitions. [2020-10-27 23:43:45,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:43:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 8686 transitions. [2020-10-27 23:43:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 23:43:45,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:45,888 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] [2020-10-27 23:43:45,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 23:43:45,889 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1784420193, now seen corresponding path program 1 times [2020-10-27 23:43:45,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:45,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320366381] [2020-10-27 23:43:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:50,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:43:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:43:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:43:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,430 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:43:51,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:51,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:51,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320366381] [2020-10-27 23:43:51,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:51,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:43:51,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284784288] [2020-10-27 23:43:51,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:43:51,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:51,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:43:51,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:43:51,481 INFO L87 Difference]: Start difference. First operand 5833 states and 8686 transitions. Second operand 4 states.