/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:25:37,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:25:37,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:25:37,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:25:37,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:25:37,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:25:37,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:25:37,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:25:37,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:25:37,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:25:37,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:25:37,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:25:37,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:25:38,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:25:38,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:25:38,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:25:38,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:25:38,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:25:38,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:25:38,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:25:38,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:25:38,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:25:38,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:25:38,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:25:38,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:25:38,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:25:38,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:25:38,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:25:38,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:25:38,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:25:38,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:25:38,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:25:38,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:25:38,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:25:38,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:25:38,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:25:38,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:25:38,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:25:38,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:25:38,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:25:38,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:25:38,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:25:38,116 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:25:38,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:25:38,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:25:38,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:25:38,121 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:25:38,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:25:38,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:25:38,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:25:38,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:25:38,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:25:38,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:25:38,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:25:38,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:25:38,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:25:38,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:25:38,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:25:38,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:25:38,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:25:38,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:25:38,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:25:38,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:25:38,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:25:38,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:25:38,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:25:38,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:25:38,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:25:38,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:25:38,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:25:38,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:25:38,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:25:38,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:25:38,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:25:38,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:25:38,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:25:38,586 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:25:38,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:25:38,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e68d2c4/fedc95ba692241ae9034cc30ce76b213/FLAGcd3bd2d82 [2020-10-27 05:25:39,437 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:25:39,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:25:39,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e68d2c4/fedc95ba692241ae9034cc30ce76b213/FLAGcd3bd2d82 [2020-10-27 05:25:39,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5e68d2c4/fedc95ba692241ae9034cc30ce76b213 [2020-10-27 05:25:39,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:25:39,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:25:39,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:25:39,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:25:39,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:25:39,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:25:39" (1/1) ... [2020-10-27 05:25:39,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626a3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:39, skipping insertion in model container [2020-10-27 05:25:39,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:25:39" (1/1) ... [2020-10-27 05:25:39,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:25:39,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:25:40,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:25:40,204 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:25:40,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:25:40,424 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:25:40,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40 WrapperNode [2020-10-27 05:25:40,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:25:40,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:25:40,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:25:40,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:25:40,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... [2020-10-27 05:25:40,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:25:40,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:25:40,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:25:40,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:25:40,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:25:40,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:25:40,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:25:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:25:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:25:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:25:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:25:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:25:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:25:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:25:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:25:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:25:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:25:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:25:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:25:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:25:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:25:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:25:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:25:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:25:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:25:41,539 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:25:41,539 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:25:41,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:25:41 BoogieIcfgContainer [2020-10-27 05:25:41,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:25:41,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:25:41,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:25:41,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:25:41,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:25:39" (1/3) ... [2020-10-27 05:25:41,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292749d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:25:41, skipping insertion in model container [2020-10-27 05:25:41,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:25:40" (2/3) ... [2020-10-27 05:25:41,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292749d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:25:41, skipping insertion in model container [2020-10-27 05:25:41,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:25:41" (3/3) ... [2020-10-27 05:25:41,550 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 05:25:41,562 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:25:41,568 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:25:41,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:25:41,610 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:25:41,610 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:25:41,610 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:25:41,610 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:25:41,611 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:25:41,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:25:41,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:25:41,611 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:25:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-10-27 05:25:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:25:41,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:41,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:25:41,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1924019343, now seen corresponding path program 1 times [2020-10-27 05:25:41,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:41,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863967820] [2020-10-27 05:25:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:42,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:42,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:42,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:43,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:47,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:47,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:25:47,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:25:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:25:47,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:25:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:25:47,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:25:47,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:25:47,738 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:25:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:47,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:47,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:47,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:47,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:25:47,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:47,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:47,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:47,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:47,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863967820] [2020-10-27 05:25:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:47,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:25:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829007074] [2020-10-27 05:25:47,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:25:47,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:25:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:25:47,841 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 9 states. [2020-10-27 05:25:48,376 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:25:49,903 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:25:50,306 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:25:50,668 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:25:51,055 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:25:51,403 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:25:51,809 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:25:52,159 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:25:52,509 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:25:52,883 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:25:53,273 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:25:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:53,468 INFO L93 Difference]: Finished difference Result 1025 states and 1624 transitions. [2020-10-27 05:25:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:25:53,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-27 05:25:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:53,520 INFO L225 Difference]: With dead ends: 1025 [2020-10-27 05:25:53,523 INFO L226 Difference]: Without dead ends: 899 [2020-10-27 05:25:53,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:25:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-27 05:25:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 186. [2020-10-27 05:25:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 05:25:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 267 transitions. [2020-10-27 05:25:53,620 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 267 transitions. Word has length 77 [2020-10-27 05:25:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:53,622 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 267 transitions. [2020-10-27 05:25:53,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:25:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 267 transitions. [2020-10-27 05:25:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:25:53,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:53,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:25:53,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:25:53,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1590694558, now seen corresponding path program 1 times [2020-10-27 05:25:53,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:53,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651750095] [2020-10-27 05:25:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:53,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:53,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:53,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:54,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:56,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:58,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:58,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:25:58,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:25:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:25:58,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:25:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:25:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:25:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:59,195 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:25:59,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:59,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:59,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:59,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:25:59,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:25:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:59,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651750095] [2020-10-27 05:25:59,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:59,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:25:59,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295816583] [2020-10-27 05:25:59,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:25:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:25:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:25:59,286 INFO L87 Difference]: Start difference. First operand 186 states and 267 transitions. Second operand 7 states. [2020-10-27 05:25:59,591 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:26:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:00,371 INFO L93 Difference]: Finished difference Result 555 states and 851 transitions. [2020-10-27 05:26:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:00,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:00,376 INFO L225 Difference]: With dead ends: 555 [2020-10-27 05:26:00,376 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 05:26:00,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 05:26:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 189. [2020-10-27 05:26:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 05:26:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 271 transitions. [2020-10-27 05:26:00,408 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 271 transitions. Word has length 79 [2020-10-27 05:26:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:00,409 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 271 transitions. [2020-10-27 05:26:00,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 271 transitions. [2020-10-27 05:26:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:00,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:00,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:00,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:26:00,412 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1099986584, now seen corresponding path program 1 times [2020-10-27 05:26:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:00,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582110358] [2020-10-27 05:26:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:05,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:05,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:05,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:26:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:05,822 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:05,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:05,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:05,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:05,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:05,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:05,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:05,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582110358] [2020-10-27 05:26:05,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:05,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:26:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308307873] [2020-10-27 05:26:05,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:26:05,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:26:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:05,908 INFO L87 Difference]: Start difference. First operand 189 states and 271 transitions. Second operand 7 states. [2020-10-27 05:26:06,238 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:26:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:07,021 INFO L93 Difference]: Finished difference Result 543 states and 830 transitions. [2020-10-27 05:26:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:07,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:07,025 INFO L225 Difference]: With dead ends: 543 [2020-10-27 05:26:07,025 INFO L226 Difference]: Without dead ends: 404 [2020-10-27 05:26:07,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-27 05:26:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 197. [2020-10-27 05:26:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 05:26:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 282 transitions. [2020-10-27 05:26:07,058 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 282 transitions. Word has length 79 [2020-10-27 05:26:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:07,059 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 282 transitions. [2020-10-27 05:26:07,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 282 transitions. [2020-10-27 05:26:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:07,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:07,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:07,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:26:07,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1899348754, now seen corresponding path program 1 times [2020-10-27 05:26:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:07,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588649018] [2020-10-27 05:26:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:07,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:07,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:12,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:12,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:12,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:26:12,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:26:12,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:26:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:26:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:26:12,541 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:12,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:12,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:12,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:12,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:12,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:26:12,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:12,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:12,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588649018] [2020-10-27 05:26:12,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:12,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:26:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306301740] [2020-10-27 05:26:12,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:26:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:12,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:26:12,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:12,631 INFO L87 Difference]: Start difference. First operand 197 states and 282 transitions. Second operand 7 states. [2020-10-27 05:26:13,076 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:26:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:13,901 INFO L93 Difference]: Finished difference Result 531 states and 809 transitions. [2020-10-27 05:26:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:13,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:13,907 INFO L225 Difference]: With dead ends: 531 [2020-10-27 05:26:13,907 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 05:26:13,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 05:26:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 205. [2020-10-27 05:26:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 05:26:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2020-10-27 05:26:13,943 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 79 [2020-10-27 05:26:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:13,943 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2020-10-27 05:26:13,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2020-10-27 05:26:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:13,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:13,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:13,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:26:13,949 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:13,950 INFO L82 PathProgramCache]: Analyzing trace with hash 452402048, now seen corresponding path program 1 times [2020-10-27 05:26:13,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:13,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553214141] [2020-10-27 05:26:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:14,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:18,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:26:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:18,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:26:18,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:19,449 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:19,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:19,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:19,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:19,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553214141] [2020-10-27 05:26:19,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:19,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:26:19,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944234650] [2020-10-27 05:26:19,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:26:19,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:26:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:19,565 INFO L87 Difference]: Start difference. First operand 205 states and 293 transitions. Second operand 7 states. [2020-10-27 05:26:19,912 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:26:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:20,867 INFO L93 Difference]: Finished difference Result 517 states and 784 transitions. [2020-10-27 05:26:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:20,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:20,875 INFO L225 Difference]: With dead ends: 517 [2020-10-27 05:26:20,875 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 05:26:20,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 05:26:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 247. [2020-10-27 05:26:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 05:26:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 357 transitions. [2020-10-27 05:26:20,915 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 357 transitions. Word has length 79 [2020-10-27 05:26:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:20,916 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 357 transitions. [2020-10-27 05:26:20,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 357 transitions. [2020-10-27 05:26:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:20,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:20,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:20,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:26:20,918 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 222489430, now seen corresponding path program 1 times [2020-10-27 05:26:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870199414] [2020-10-27 05:26:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:21,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:21,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:21,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:22,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:25,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:25,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:25,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:26:25,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:26:25,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:26:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:26:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:26:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:26,345 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:26,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:26,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:26,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:26,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:26,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:26:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870199414] [2020-10-27 05:26:26,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:26,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:26:26,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315872208] [2020-10-27 05:26:26,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:26:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:26,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:26:26,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:26:26,414 INFO L87 Difference]: Start difference. First operand 247 states and 357 transitions. Second operand 5 states. [2020-10-27 05:26:26,778 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:26:27,819 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:26:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:28,097 INFO L93 Difference]: Finished difference Result 703 states and 1072 transitions. [2020-10-27 05:26:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:26:28,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-27 05:26:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:28,103 INFO L225 Difference]: With dead ends: 703 [2020-10-27 05:26:28,103 INFO L226 Difference]: Without dead ends: 564 [2020-10-27 05:26:28,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-27 05:26:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-10-27 05:26:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-10-27 05:26:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 842 transitions. [2020-10-27 05:26:28,187 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 842 transitions. Word has length 79 [2020-10-27 05:26:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:28,188 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 842 transitions. [2020-10-27 05:26:28,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:26:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 842 transitions. [2020-10-27 05:26:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:28,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:28,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:28,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:26:28,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:28,190 INFO L82 PathProgramCache]: Analyzing trace with hash 844019063, now seen corresponding path program 1 times [2020-10-27 05:26:28,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:28,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122026060] [2020-10-27 05:26:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:30,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:33,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:33,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:33,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:26:33,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:33,722 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:33,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:33,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:33,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:33,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:33,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:26:33,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:26:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:26:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122026060] [2020-10-27 05:26:33,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:33,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:26:33,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364805453] [2020-10-27 05:26:33,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:26:33,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:26:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:26:33,779 INFO L87 Difference]: Start difference. First operand 558 states and 842 transitions. Second operand 9 states. [2020-10-27 05:26:34,292 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:26:35,413 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:26:35,795 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:26:36,260 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:26:36,674 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:26:37,516 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:26:37,839 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:26:38,274 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:26:38,671 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:26:39,057 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:26:39,448 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:26:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:39,595 INFO L93 Difference]: Finished difference Result 2834 states and 4411 transitions. [2020-10-27 05:26:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:26:39,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-27 05:26:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:39,611 INFO L225 Difference]: With dead ends: 2834 [2020-10-27 05:26:39,612 INFO L226 Difference]: Without dead ends: 2437 [2020-10-27 05:26:39,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:26:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-27 05:26:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 558. [2020-10-27 05:26:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-10-27 05:26:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 839 transitions. [2020-10-27 05:26:39,724 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 839 transitions. Word has length 79 [2020-10-27 05:26:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:39,725 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 839 transitions. [2020-10-27 05:26:39,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:26:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 839 transitions. [2020-10-27 05:26:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:39,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:39,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:39,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:26:39,727 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash -283699834, now seen corresponding path program 1 times [2020-10-27 05:26:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:39,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470324644] [2020-10-27 05:26:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:39,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:39,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:40,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:43,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:44,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:44,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:44,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:26:44,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 05:26:44,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:44,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:26:44,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:44,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:26:44,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:45,205 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:45,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:45,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:45,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:45,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:45,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:45,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:45,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470324644] [2020-10-27 05:26:45,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:45,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:26:45,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363101563] [2020-10-27 05:26:45,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:26:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:26:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:45,294 INFO L87 Difference]: Start difference. First operand 558 states and 839 transitions. Second operand 7 states. [2020-10-27 05:26:45,623 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:26:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:46,650 INFO L93 Difference]: Finished difference Result 1384 states and 2122 transitions. [2020-10-27 05:26:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:46,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:46,656 INFO L225 Difference]: With dead ends: 1384 [2020-10-27 05:26:46,656 INFO L226 Difference]: Without dead ends: 963 [2020-10-27 05:26:46,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-10-27 05:26:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 550. [2020-10-27 05:26:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-27 05:26:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 819 transitions. [2020-10-27 05:26:46,752 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 819 transitions. Word has length 79 [2020-10-27 05:26:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:46,753 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 819 transitions. [2020-10-27 05:26:46,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 819 transitions. [2020-10-27 05:26:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:26:46,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:46,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:46,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:26:46,777 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1052899340, now seen corresponding path program 1 times [2020-10-27 05:26:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889305429] [2020-10-27 05:26:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:46,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:46,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:47,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:47,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:47,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:50,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:26:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:51,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 05:26:51,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:52,143 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:52,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:52,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:26:52,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:52,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889305429] [2020-10-27 05:26:52,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:52,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:26:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145261504] [2020-10-27 05:26:52,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:26:52,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:26:52,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:26:52,194 INFO L87 Difference]: Start difference. First operand 550 states and 819 transitions. Second operand 7 states. [2020-10-27 05:26:52,534 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:26:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:53,510 INFO L93 Difference]: Finished difference Result 1444 states and 2210 transitions. [2020-10-27 05:26:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:26:53,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 05:26:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:53,515 INFO L225 Difference]: With dead ends: 1444 [2020-10-27 05:26:53,515 INFO L226 Difference]: Without dead ends: 995 [2020-10-27 05:26:53,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-10-27 05:26:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 522. [2020-10-27 05:26:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-27 05:26:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 777 transitions. [2020-10-27 05:26:53,611 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 777 transitions. Word has length 79 [2020-10-27 05:26:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:53,611 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 777 transitions. [2020-10-27 05:26:53,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:26:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 777 transitions. [2020-10-27 05:26:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:26:53,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:53,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:53,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:26:53,613 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash 335388263, now seen corresponding path program 1 times [2020-10-27 05:26:53,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:53,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120769966] [2020-10-27 05:26:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:54,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:57,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:57,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4030 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:26:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:57,963 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:26:57,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:57,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:26:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:26:57,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:57,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120769966] [2020-10-27 05:26:57,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:57,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:26:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7144587] [2020-10-27 05:26:58,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:26:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:26:58,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:26:58,001 INFO L87 Difference]: Start difference. First operand 522 states and 777 transitions. Second operand 4 states. [2020-10-27 05:26:58,343 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:26:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:59,134 INFO L93 Difference]: Finished difference Result 1026 states and 1567 transitions. [2020-10-27 05:26:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:26:59,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 05:26:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:59,139 INFO L225 Difference]: With dead ends: 1026 [2020-10-27 05:26:59,139 INFO L226 Difference]: Without dead ends: 725 [2020-10-27 05:26:59,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:26:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-27 05:26:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 722. [2020-10-27 05:26:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-10-27 05:26:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1096 transitions. [2020-10-27 05:26:59,289 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1096 transitions. Word has length 80 [2020-10-27 05:26:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:59,289 INFO L481 AbstractCegarLoop]: Abstraction has 722 states and 1096 transitions. [2020-10-27 05:26:59,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:26:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1096 transitions. [2020-10-27 05:26:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:26:59,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:59,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:59,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:26:59,291 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:59,291 INFO L82 PathProgramCache]: Analyzing trace with hash 677268347, now seen corresponding path program 1 times [2020-10-27 05:26:59,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:59,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744685114] [2020-10-27 05:26:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:59,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:59,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:59,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:00,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:27:04,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:04,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:27:04,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:04,708 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:04,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:04,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:04,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:04,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:04,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744685114] [2020-10-27 05:27:04,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:04,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:27:04,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504142777] [2020-10-27 05:27:04,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:27:04,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:04,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:27:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:27:04,760 INFO L87 Difference]: Start difference. First operand 722 states and 1096 transitions. Second operand 6 states. [2020-10-27 05:27:05,123 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:27:06,077 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:27:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:06,237 INFO L93 Difference]: Finished difference Result 1892 states and 2917 transitions. [2020-10-27 05:27:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:27:06,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:27:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:06,244 INFO L225 Difference]: With dead ends: 1892 [2020-10-27 05:27:06,245 INFO L226 Difference]: Without dead ends: 1221 [2020-10-27 05:27:06,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:27:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2020-10-27 05:27:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1218. [2020-10-27 05:27:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-10-27 05:27:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1865 transitions. [2020-10-27 05:27:06,465 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1865 transitions. Word has length 81 [2020-10-27 05:27:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:06,465 INFO L481 AbstractCegarLoop]: Abstraction has 1218 states and 1865 transitions. [2020-10-27 05:27:06,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:27:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1865 transitions. [2020-10-27 05:27:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:27:06,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:06,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:06,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:27:06,467 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash -791225504, now seen corresponding path program 1 times [2020-10-27 05:27:06,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:06,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820526960] [2020-10-27 05:27:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:06,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:06,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:08,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:08,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:27:08,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:27:08,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:08,993 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:09,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:09,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:09,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:09,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:27:09,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:09,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:27:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:27:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:09,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820526960] [2020-10-27 05:27:09,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:09,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:27:09,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148848243] [2020-10-27 05:27:09,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:27:09,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:27:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:27:09,050 INFO L87 Difference]: Start difference. First operand 1218 states and 1865 transitions. Second operand 4 states. [2020-10-27 05:27:09,359 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:27:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:10,302 INFO L93 Difference]: Finished difference Result 3361 states and 5194 transitions. [2020-10-27 05:27:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:27:10,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 05:27:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:10,312 INFO L225 Difference]: With dead ends: 3361 [2020-10-27 05:27:10,312 INFO L226 Difference]: Without dead ends: 2202 [2020-10-27 05:27:10,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:27:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2020-10-27 05:27:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2199. [2020-10-27 05:27:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2199 states. [2020-10-27 05:27:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3371 transitions. [2020-10-27 05:27:10,697 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3371 transitions. Word has length 81 [2020-10-27 05:27:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:10,697 INFO L481 AbstractCegarLoop]: Abstraction has 2199 states and 3371 transitions. [2020-10-27 05:27:10,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:27:10,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3371 transitions. [2020-10-27 05:27:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:27:10,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:10,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:10,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:27:10,699 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:10,699 INFO L82 PathProgramCache]: Analyzing trace with hash -769372816, now seen corresponding path program 1 times [2020-10-27 05:27:10,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:10,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684836633] [2020-10-27 05:27:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:12,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:12,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:27:12,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1275 [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:27:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:12,295 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:12,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:12,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:12,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:12,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:27:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:12,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684836633] [2020-10-27 05:27:12,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:12,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:27:12,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194697054] [2020-10-27 05:27:12,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:27:12,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:27:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:27:12,327 INFO L87 Difference]: Start difference. First operand 2199 states and 3371 transitions. Second operand 4 states. [2020-10-27 05:27:12,641 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:27:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:13,800 INFO L93 Difference]: Finished difference Result 6156 states and 9473 transitions. [2020-10-27 05:27:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:27:13,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:27:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:13,819 INFO L225 Difference]: With dead ends: 6156 [2020-10-27 05:27:13,819 INFO L226 Difference]: Without dead ends: 4022 [2020-10-27 05:27:13,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:27:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2020-10-27 05:27:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 4019. [2020-10-27 05:27:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-10-27 05:27:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 6134 transitions. [2020-10-27 05:27:14,481 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 6134 transitions. Word has length 82 [2020-10-27 05:27:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:14,481 INFO L481 AbstractCegarLoop]: Abstraction has 4019 states and 6134 transitions. [2020-10-27 05:27:14,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:27:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 6134 transitions. [2020-10-27 05:27:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:27:14,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:14,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:14,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:27:14,483 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1349758064, now seen corresponding path program 1 times [2020-10-27 05:27:14,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:14,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277533397] [2020-10-27 05:27:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:14,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:14,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:16,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:16,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:27:16,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2203 [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:27:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:17,059 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:17,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:17,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:17,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:17,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277533397] [2020-10-27 05:27:17,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:17,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:27:17,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108673441] [2020-10-27 05:27:17,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:27:17,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:27:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:27:17,107 INFO L87 Difference]: Start difference. First operand 4019 states and 6134 transitions. Second operand 6 states. [2020-10-27 05:27:17,498 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:27:18,647 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:27:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:19,552 INFO L93 Difference]: Finished difference Result 11874 states and 18166 transitions. [2020-10-27 05:27:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:27:19,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:27:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:19,585 INFO L225 Difference]: With dead ends: 11874 [2020-10-27 05:27:19,586 INFO L226 Difference]: Without dead ends: 7918 [2020-10-27 05:27:19,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:27:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2020-10-27 05:27:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 7915. [2020-10-27 05:27:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7915 states. [2020-10-27 05:27:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7915 states to 7915 states and 12061 transitions. [2020-10-27 05:27:20,803 INFO L78 Accepts]: Start accepts. Automaton has 7915 states and 12061 transitions. Word has length 83 [2020-10-27 05:27:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:20,804 INFO L481 AbstractCegarLoop]: Abstraction has 7915 states and 12061 transitions. [2020-10-27 05:27:20,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:27:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7915 states and 12061 transitions. [2020-10-27 05:27:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:27:20,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:20,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:20,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:27:20,805 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1086787243, now seen corresponding path program 1 times [2020-10-27 05:27:20,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:20,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156571425] [2020-10-27 05:27:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:20,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:20,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:21,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:21,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:27:21,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:27:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-27 05:27:21,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:27:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:27:21,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:21,836 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:21,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:21,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:21,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:21,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:27:21,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:21,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:27:21,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:21,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:27:21,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:21,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156571425] [2020-10-27 05:27:21,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:21,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:27:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901224918] [2020-10-27 05:27:21,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:27:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:27:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:27:21,875 INFO L87 Difference]: Start difference. First operand 7915 states and 12061 transitions. Second operand 4 states. [2020-10-27 05:27:22,209 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:27:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:24,799 INFO L93 Difference]: Finished difference Result 22436 states and 34136 transitions. [2020-10-27 05:27:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:27:24,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:27:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:24,841 INFO L225 Difference]: With dead ends: 22436 [2020-10-27 05:27:24,842 INFO L226 Difference]: Without dead ends: 14592 [2020-10-27 05:27:24,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:27:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2020-10-27 05:27:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 14589. [2020-10-27 05:27:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14589 states. [2020-10-27 05:27:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14589 states to 14589 states and 22006 transitions. [2020-10-27 05:27:26,989 INFO L78 Accepts]: Start accepts. Automaton has 14589 states and 22006 transitions. Word has length 83 [2020-10-27 05:27:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:26,990 INFO L481 AbstractCegarLoop]: Abstraction has 14589 states and 22006 transitions. [2020-10-27 05:27:26,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:27:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 14589 states and 22006 transitions. [2020-10-27 05:27:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:27:26,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:26,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:26,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:27:26,991 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -134812143, now seen corresponding path program 1 times [2020-10-27 05:27:26,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:26,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8216904] [2020-10-27 05:27:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:27,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:27,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:27:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:27,741 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:27,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:27,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:27,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:27,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:27:27,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:27,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:27:27,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:27,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:27:27,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:27,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8216904] [2020-10-27 05:27:27,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:27,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:27:27,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121112265] [2020-10-27 05:27:27,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:27:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:27:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:27:27,860 INFO L87 Difference]: Start difference. First operand 14589 states and 22006 transitions. Second operand 4 states. [2020-10-27 05:27:28,194 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:27:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:32,689 INFO L93 Difference]: Finished difference Result 41302 states and 62094 transitions. [2020-10-27 05:27:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:27:32,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:27:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:32,760 INFO L225 Difference]: With dead ends: 41302 [2020-10-27 05:27:32,760 INFO L226 Difference]: Without dead ends: 26790 [2020-10-27 05:27:32,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:27:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26790 states. [2020-10-27 05:27:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26790 to 26787. [2020-10-27 05:27:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26787 states. [2020-10-27 05:27:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26787 states to 26787 states and 39883 transitions. [2020-10-27 05:27:36,903 INFO L78 Accepts]: Start accepts. Automaton has 26787 states and 39883 transitions. Word has length 84 [2020-10-27 05:27:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:36,904 INFO L481 AbstractCegarLoop]: Abstraction has 26787 states and 39883 transitions. [2020-10-27 05:27:36,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:27:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26787 states and 39883 transitions. [2020-10-27 05:27:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:27:36,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:36,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:36,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:27:36,905 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1385656579, now seen corresponding path program 1 times [2020-10-27 05:27:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:36,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126450169] [2020-10-27 05:27:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:36,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:37,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:27:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:27:37,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:37,853 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:37,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:37,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:37,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:37,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:27:37,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:37,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126450169] [2020-10-27 05:27:37,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:37,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:27:37,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549942837] [2020-10-27 05:27:37,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:27:37,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:27:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:27:37,895 INFO L87 Difference]: Start difference. First operand 26787 states and 39883 transitions. Second operand 6 states. [2020-10-27 05:27:38,250 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:27:39,980 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:27:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:27:47,163 INFO L93 Difference]: Finished difference Result 79918 states and 118901 transitions. [2020-10-27 05:27:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:27:47,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 05:27:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:27:47,289 INFO L225 Difference]: With dead ends: 79918 [2020-10-27 05:27:47,290 INFO L226 Difference]: Without dead ends: 53206 [2020-10-27 05:27:47,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:27:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53206 states. [2020-10-27 05:27:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53206 to 53203. [2020-10-27 05:27:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53203 states. [2020-10-27 05:27:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53203 states to 53203 states and 78810 transitions. [2020-10-27 05:27:55,465 INFO L78 Accepts]: Start accepts. Automaton has 53203 states and 78810 transitions. Word has length 85 [2020-10-27 05:27:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:27:55,465 INFO L481 AbstractCegarLoop]: Abstraction has 53203 states and 78810 transitions. [2020-10-27 05:27:55,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:27:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 53203 states and 78810 transitions. [2020-10-27 05:27:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:27:55,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:55,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:27:55,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:27:55,466 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash -520124190, now seen corresponding path program 1 times [2020-10-27 05:27:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:55,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970893500] [2020-10-27 05:27:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:55,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:27:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:56,249 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:27:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:27:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:27:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970893500] [2020-10-27 05:27:56,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:56,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:27:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629866108] [2020-10-27 05:27:56,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:27:56,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:27:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:27:56,291 INFO L87 Difference]: Start difference. First operand 53203 states and 78810 transitions. Second operand 4 states. [2020-10-27 05:27:56,645 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:28:11,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:11,194 INFO L93 Difference]: Finished difference Result 150233 states and 221278 transitions. [2020-10-27 05:28:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:28:11,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-27 05:28:11,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:11,374 INFO L225 Difference]: With dead ends: 150233 [2020-10-27 05:28:11,374 INFO L226 Difference]: Without dead ends: 97109 [2020-10-27 05:28:11,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:28:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97109 states. [2020-10-27 05:28:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97109 to 97076. [2020-10-27 05:28:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97076 states. [2020-10-27 05:28:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97076 states to 97076 states and 141363 transitions. [2020-10-27 05:28:26,504 INFO L78 Accepts]: Start accepts. Automaton has 97076 states and 141363 transitions. Word has length 85 [2020-10-27 05:28:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:26,505 INFO L481 AbstractCegarLoop]: Abstraction has 97076 states and 141363 transitions. [2020-10-27 05:28:26,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:28:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 97076 states and 141363 transitions. [2020-10-27 05:28:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:28:26,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:26,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:28:26,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:28:26,506 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 327266378, now seen corresponding path program 1 times [2020-10-27 05:28:26,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:26,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251661842] [2020-10-27 05:28:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:26,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:28:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:27,210 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:28:27,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:27,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:27,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:27,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:27,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:28:27,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251661842] [2020-10-27 05:28:27,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:27,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:28:27,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991120381] [2020-10-27 05:28:27,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:28:27,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:28:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:28:27,247 INFO L87 Difference]: Start difference. First operand 97076 states and 141363 transitions. Second operand 5 states. [2020-10-27 05:28:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:52,121 INFO L93 Difference]: Finished difference Result 161485 states and 234676 transitions. [2020-10-27 05:28:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:28:52,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-27 05:28:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:52,612 INFO L225 Difference]: With dead ends: 161485 [2020-10-27 05:28:52,612 INFO L226 Difference]: Without dead ends: 161482 [2020-10-27 05:28:52,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:28:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161482 states. [2020-10-27 05:29:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161482 to 99124. [2020-10-27 05:29:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99124 states. [2020-10-27 05:29:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99124 states to 99124 states and 142771 transitions. [2020-10-27 05:29:09,272 INFO L78 Accepts]: Start accepts. Automaton has 99124 states and 142771 transitions. Word has length 86 [2020-10-27 05:29:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:09,272 INFO L481 AbstractCegarLoop]: Abstraction has 99124 states and 142771 transitions. [2020-10-27 05:29:09,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:29:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 99124 states and 142771 transitions. [2020-10-27 05:29:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 05:29:09,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:09,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:29:09,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:29:09,286 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1290165545, now seen corresponding path program 1 times [2020-10-27 05:29:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:09,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087112516] [2020-10-27 05:29:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:09,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:09,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking...