/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/eca-rers2012/Problem17_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:14:18,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:14:18,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:14:18,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:14:18,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:14:18,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:14:18,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:14:18,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:14:18,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:14:18,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:14:18,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:14:18,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:14:18,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:14:18,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:14:18,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:14:18,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:14:18,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:14:18,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:14:18,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:14:18,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:14:18,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:14:18,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:14:18,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:14:18,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:14:18,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:14:18,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:14:18,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:14:18,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:14:18,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:14:18,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:14:18,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:14:18,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:14:18,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:14:18,517 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 00:14:18,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:14:18,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:14:18,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:14:18,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:14:18,549 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:14:18,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:14:18,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:14:18,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:14:18,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:14:18,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:14:18,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:14:18,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:14:18,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:14:18,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:14:18,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:14:18,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:14:18,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:14:18,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:14:18,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:14:18,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:14:18,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:14:18,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:14:18,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:14:18,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:14:18,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:14:18,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:14:18,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:14:18,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:14:18,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:14:18,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:14:19,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:14:19,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:14:19,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:14:19,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:14:19,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:14:19,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label36.c [2020-10-27 00:14:19,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a2a0b80/5e7048a9703e4a1b94bf0ea740479a97/FLAG03ba82a7e [2020-10-27 00:14:20,053 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:14:20,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label36.c [2020-10-27 00:14:20,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a2a0b80/5e7048a9703e4a1b94bf0ea740479a97/FLAG03ba82a7e [2020-10-27 00:14:20,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a2a0b80/5e7048a9703e4a1b94bf0ea740479a97 [2020-10-27 00:14:20,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:14:20,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:14:20,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:20,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:14:20,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:14:20,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:20" (1/1) ... [2020-10-27 00:14:20,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9562b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:20, skipping insertion in model container [2020-10-27 00:14:20,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:20" (1/1) ... [2020-10-27 00:14:20,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:14:20,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:14:21,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:21,202 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:14:21,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:21,746 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:14:21,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21 WrapperNode [2020-10-27 00:14:21,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:21,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:14:21,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:14:21,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:14:21,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:21,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:21,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:21,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:21,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:22,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:22,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (1/1) ... [2020-10-27 00:14:22,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:14:22,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:14:22,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:14:22,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:14:22,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (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 00:14:22,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:14:22,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:14:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:14:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:14:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:14:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:14:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:14:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:14:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:14:22,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:14:22,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:14:31,839 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:14:31,840 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:14:31,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:31 BoogieIcfgContainer [2020-10-27 00:14:31,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:14:31,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:14:31,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:14:31,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:14:31,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:14:20" (1/3) ... [2020-10-27 00:14:31,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dc0aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:31, skipping insertion in model container [2020-10-27 00:14:31,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:21" (2/3) ... [2020-10-27 00:14:31,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22dc0aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:31, skipping insertion in model container [2020-10-27 00:14:31,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:31" (3/3) ... [2020-10-27 00:14:31,853 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label36.c [2020-10-27 00:14:31,865 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:14:31,872 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:14:31,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:14:31,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:14:31,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:14:31,918 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:14:31,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:14:31,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:14:31,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:14:31,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:14:31,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:14:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:14:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 00:14:31,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:31,961 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] [2020-10-27 00:14:31,962 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1179845790, now seen corresponding path program 1 times [2020-10-27 00:14:31,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:31,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832456999] [2020-10-27 00:14:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:14:32,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:32,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-27 00:14:32,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 00:14:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:14:33,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:33,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:33,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:33,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:14:33,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:33,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:33,084 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 00:14:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832456999] [2020-10-27 00:14:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:14:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368374705] [2020-10-27 00:14:33,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:14:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:14:33,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:14:33,113 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:14:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:44,792 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:14:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:14:44,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 00:14:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:44,832 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:14:44,832 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:14:44,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:14:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:14:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:14:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:14:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:14:44,975 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 64 [2020-10-27 00:14:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:44,976 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:14:44,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:14:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:14:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 00:14:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:44,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:14:44,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:14:44,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1332526658, now seen corresponding path program 1 times [2020-10-27 00:14:44,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:44,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247972253] [2020-10-27 00:14:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:48,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:48,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 00:14:48,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:14:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2972 [2020-10-27 00:14:48,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:14:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:14:48,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:48,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:48,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:48,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:48,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:14:48,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:48,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:48,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:48,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:14:48,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:48,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 00:14:48,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:48,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:14:48,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:48,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247972253] [2020-10-27 00:14:48,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:48,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:14:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097623890] [2020-10-27 00:14:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:14:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:48,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:14:48,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:14:48,605 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:15:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:04,227 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-27 00:15:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:15:04,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-27 00:15:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:04,242 INFO L225 Difference]: With dead ends: 2964 [2020-10-27 00:15:04,242 INFO L226 Difference]: Without dead ends: 1967 [2020-10-27 00:15:04,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:15:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-27 00:15:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-27 00:15:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-27 00:15:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-27 00:15:04,322 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 135 [2020-10-27 00:15:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:04,323 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-27 00:15:04,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:15:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-27 00:15:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 00:15:04,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:04,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:15:04,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:15:04,327 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 645369871, now seen corresponding path program 1 times [2020-10-27 00:15:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:04,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748426462] [2020-10-27 00:15:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:04,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:05,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:09,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:09,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 00:15:09,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:15:09,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 00:15:09,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:15:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:15:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:09,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:09,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:09,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:09,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:09,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:09,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:15:09,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:09,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:09,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:09,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:09,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:15:09,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 00:15:09,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:15:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:15:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:15:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:15:10,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748426462] [2020-10-27 00:15:10,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:10,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401650071] [2020-10-27 00:15:10,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:15:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:10,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:15:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:15:10,334 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 8 states. [2020-10-27 00:15:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:26,848 INFO L93 Difference]: Finished difference Result 4335 states and 5498 transitions. [2020-10-27 00:15:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:15:26,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-10-27 00:15:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:26,871 INFO L225 Difference]: With dead ends: 4335 [2020-10-27 00:15:26,871 INFO L226 Difference]: Without dead ends: 2390 [2020-10-27 00:15:26,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:15:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-10-27 00:15:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2352. [2020-10-27 00:15:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2352 states. [2020-10-27 00:15:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 2926 transitions. [2020-10-27 00:15:26,950 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 2926 transitions. Word has length 138 [2020-10-27 00:15:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:26,950 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 2926 transitions. [2020-10-27 00:15:26,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:15:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 2926 transitions. [2020-10-27 00:15:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 00:15:26,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:26,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:15:26,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:15:26,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1082982494, now seen corresponding path program 1 times [2020-10-27 00:15:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:26,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682536141] [2020-10-27 00:15:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:27,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:27,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:27,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 00:15:27,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 00:15:27,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:15:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 00:15:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:27,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:27,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:27,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:27,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:15:27,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:15:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:15:27,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:27,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:27,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:27,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:15:27,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:27,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 00:15:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:15:27,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:15:27,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682536141] [2020-10-27 00:15:27,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:27,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:15:27,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722233417] [2020-10-27 00:15:27,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:15:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:15:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:15:27,664 INFO L87 Difference]: Start difference. First operand 2352 states and 2926 transitions. Second operand 6 states. [2020-10-27 00:15:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:42,169 INFO L93 Difference]: Finished difference Result 4708 states and 6230 transitions. [2020-10-27 00:15:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:15:42,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-10-27 00:15:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:42,188 INFO L225 Difference]: With dead ends: 4708 [2020-10-27 00:15:42,188 INFO L226 Difference]: Without dead ends: 2795 [2020-10-27 00:15:42,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2020-10-27 00:15:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2785. [2020-10-27 00:15:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2020-10-27 00:15:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 3709 transitions. [2020-10-27 00:15:42,274 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 3709 transitions. Word has length 151 [2020-10-27 00:15:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:42,275 INFO L481 AbstractCegarLoop]: Abstraction has 2785 states and 3709 transitions. [2020-10-27 00:15:42,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:15:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 3709 transitions. [2020-10-27 00:15:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 00:15:42,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:42,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:15:42,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:15:42,280 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1281847810, now seen corresponding path program 1 times [2020-10-27 00:15:42,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:42,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548992848] [2020-10-27 00:15:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:42,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:46,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4271 [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:15:46,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-27 00:15:46,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:46,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:46,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:46,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:46,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:47,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:47,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:15:47,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 00:15:47,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:47,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:15:47,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:47,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:15:47,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:47,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:15:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:47,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:47,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:15:47,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 00:15:47,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:15:47,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:15:47,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548992848] [2020-10-27 00:15:47,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:47,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:47,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589363013] [2020-10-27 00:15:47,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:15:47,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:15:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:15:47,509 INFO L87 Difference]: Start difference. First operand 2785 states and 3709 transitions. Second operand 8 states. [2020-10-27 00:16:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:13,334 INFO L93 Difference]: Finished difference Result 9253 states and 13159 transitions. [2020-10-27 00:16:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:16:13,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 222 [2020-10-27 00:16:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:13,374 INFO L225 Difference]: With dead ends: 9253 [2020-10-27 00:16:13,375 INFO L226 Difference]: Without dead ends: 6452 [2020-10-27 00:16:13,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:16:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2020-10-27 00:16:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 5963. [2020-10-27 00:16:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5963 states. [2020-10-27 00:16:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 7998 transitions. [2020-10-27 00:16:13,589 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 7998 transitions. Word has length 222 [2020-10-27 00:16:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:13,590 INFO L481 AbstractCegarLoop]: Abstraction has 5963 states and 7998 transitions. [2020-10-27 00:16:13,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:16:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 7998 transitions. [2020-10-27 00:16:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-27 00:16:13,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:13,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:16:13,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:16:13,597 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1504391210, now seen corresponding path program 1 times [2020-10-27 00:16:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:13,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504973388] [2020-10-27 00:16:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:14,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 00:16:16,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:16:16,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2710 [2020-10-27 00:16:16,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:16:16,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:16,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-27 00:16:16,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:16,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:16:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:16:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:16,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:17,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:17,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:16:17,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:17,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 00:16:17,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:17,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:16:17,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:16:17,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504973388] [2020-10-27 00:16:17,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:17,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:16:17,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345411338] [2020-10-27 00:16:17,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:16:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:16:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:16:17,316 INFO L87 Difference]: Start difference. First operand 5963 states and 7998 transitions. Second operand 8 states. [2020-10-27 00:16:18,197 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 00:16:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:42,869 INFO L93 Difference]: Finished difference Result 13495 states and 18224 transitions. [2020-10-27 00:16:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:16:42,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2020-10-27 00:16:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:42,912 INFO L225 Difference]: With dead ends: 13495 [2020-10-27 00:16:42,912 INFO L226 Difference]: Without dead ends: 7087 [2020-10-27 00:16:42,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2020-10-27 00:16:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 6998. [2020-10-27 00:16:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6998 states. [2020-10-27 00:16:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 9295 transitions. [2020-10-27 00:16:43,127 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 9295 transitions. Word has length 228 [2020-10-27 00:16:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:43,128 INFO L481 AbstractCegarLoop]: Abstraction has 6998 states and 9295 transitions. [2020-10-27 00:16:43,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:16:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 9295 transitions. [2020-10-27 00:16:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 00:16:43,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:43,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:43,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:16:43,133 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 648045424, now seen corresponding path program 1 times [2020-10-27 00:16:43,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:43,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218456252] [2020-10-27 00:16:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:48,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-27 00:16:48,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 00:16:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:16:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 00:16:48,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:48,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:48,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:48,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:48,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:48,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:48,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 00:16:48,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:48,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:48,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:48,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 137 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:16:49,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218456252] [2020-10-27 00:16:49,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:49,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:16:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319961519] [2020-10-27 00:16:49,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:16:49,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:16:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:16:49,113 INFO L87 Difference]: Start difference. First operand 6998 states and 9295 transitions. Second operand 6 states. [2020-10-27 00:17:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:04,211 INFO L93 Difference]: Finished difference Result 17226 states and 23860 transitions. [2020-10-27 00:17:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:17:04,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2020-10-27 00:17:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:04,255 INFO L225 Difference]: With dead ends: 17226 [2020-10-27 00:17:04,255 INFO L226 Difference]: Without dead ends: 10669 [2020-10-27 00:17:04,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:17:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2020-10-27 00:17:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10624. [2020-10-27 00:17:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10624 states. [2020-10-27 00:17:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 13961 transitions. [2020-10-27 00:17:04,506 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 13961 transitions. Word has length 237 [2020-10-27 00:17:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:04,507 INFO L481 AbstractCegarLoop]: Abstraction has 10624 states and 13961 transitions. [2020-10-27 00:17:04,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:17:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 13961 transitions. [2020-10-27 00:17:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 00:17:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:04,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:04,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:17:04,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1935000972, now seen corresponding path program 1 times [2020-10-27 00:17:04,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:04,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208550837] [2020-10-27 00:17:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:04,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:09,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-27 00:17:09,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:17:09,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 00:17:09,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:17:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 315 [2020-10-27 00:17:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:17:09,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:09,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:09,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:09,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:09,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:17:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:09,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:09,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:10,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:10,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:10,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:17:10,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:10,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:10,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:10,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:17:10,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:10,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 00:17:10,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:17:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:10,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:17:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:10,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:10,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:10,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:10,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:17:10,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 139 proven. 163 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 00:17:10,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208550837] [2020-10-27 00:17:10,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:10,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:17:10,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85285683] [2020-10-27 00:17:10,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:17:10,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:10,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:17:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:17:10,689 INFO L87 Difference]: Start difference. First operand 10624 states and 13961 transitions. Second operand 9 states. [2020-10-27 00:17:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:38,508 INFO L93 Difference]: Finished difference Result 35270 states and 48885 transitions. [2020-10-27 00:17:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:17:38,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 308 [2020-10-27 00:17:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:38,631 INFO L225 Difference]: With dead ends: 35270 [2020-10-27 00:17:38,632 INFO L226 Difference]: Without dead ends: 24181 [2020-10-27 00:17:38,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:17:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24181 states. [2020-10-27 00:17:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24181 to 18213. [2020-10-27 00:17:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18213 states. [2020-10-27 00:17:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18213 states to 18213 states and 23812 transitions. [2020-10-27 00:17:39,206 INFO L78 Accepts]: Start accepts. Automaton has 18213 states and 23812 transitions. Word has length 308 [2020-10-27 00:17:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:39,207 INFO L481 AbstractCegarLoop]: Abstraction has 18213 states and 23812 transitions. [2020-10-27 00:17:39,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:17:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 18213 states and 23812 transitions. [2020-10-27 00:17:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-27 00:17:39,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:39,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:17:39,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:17:39,216 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash -929491695, now seen corresponding path program 1 times [2020-10-27 00:17:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:39,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547665083] [2020-10-27 00:17:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:39,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:40,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:44,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-27 00:17:44,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:17:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 00:17:44,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:17:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:44,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:44,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:44,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:44,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:44,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:44,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:44,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:44,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:44,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:44,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 00:17:44,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:44,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:44,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:44,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:44,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:17:44,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:44,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 00:17:44,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:17:44,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:44,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:17:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:44,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:44,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:44,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:44,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 256 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:17:45,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547665083] [2020-10-27 00:17:45,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:45,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247734] [2020-10-27 00:17:45,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:45,067 INFO L87 Difference]: Start difference. First operand 18213 states and 23812 transitions. Second operand 7 states. [2020-10-27 00:18:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:06,841 INFO L93 Difference]: Finished difference Result 44546 states and 59852 transitions. [2020-10-27 00:18:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:06,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 329 [2020-10-27 00:18:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:06,928 INFO L225 Difference]: With dead ends: 44546 [2020-10-27 00:18:06,929 INFO L226 Difference]: Without dead ends: 24956 [2020-10-27 00:18:06,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:18:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24956 states. [2020-10-27 00:18:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24956 to 24742. [2020-10-27 00:18:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24742 states. [2020-10-27 00:18:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24742 states to 24742 states and 31383 transitions. [2020-10-27 00:18:07,526 INFO L78 Accepts]: Start accepts. Automaton has 24742 states and 31383 transitions. Word has length 329 [2020-10-27 00:18:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:07,527 INFO L481 AbstractCegarLoop]: Abstraction has 24742 states and 31383 transitions. [2020-10-27 00:18:07,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24742 states and 31383 transitions. [2020-10-27 00:18:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-27 00:18:07,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:07,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:18:07,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:18:07,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1065772501, now seen corresponding path program 1 times [2020-10-27 00:18:07,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:07,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988558130] [2020-10-27 00:18:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:07,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking...