/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/Problem13_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:10:59,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:10:59,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:10:59,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:10:59,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:10:59,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:10:59,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:10:59,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:10:59,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:10:59,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:10:59,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:10:59,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:10:59,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:10:59,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:10:59,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:10:59,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:10:59,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:10:59,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:10:59,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:10:59,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:10:59,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:10:59,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:10:59,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:10:59,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:10:59,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:10:59,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:10:59,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:10:59,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:10:59,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:10:59,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:10:59,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:10:59,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:10:59,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:10:59,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:10:59,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:10:59,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:10:59,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:10:59,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:10:59,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:10:59,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:10:59,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:10:59,626 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 [2020-10-26 23:10:59,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:10:59,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:10:59,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:10:59,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:10:59,689 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:10:59,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:10:59,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:10:59,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:10:59,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:10:59,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:10:59,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:10:59,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:10:59,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:10:59,692 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:10:59,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:10:59,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:10:59,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:10:59,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:10:59,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:10:59,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:10:59,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:10:59,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:10:59,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:10:59,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:10:59,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:10:59,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:10:59,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:10:59,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:10:59,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:10:59,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:11:00,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:11:00,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:11:00,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:11:00,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:11:00,209 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:11:00,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label31.c [2020-10-26 23:11:00,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7fe6b22/7a21310fc87e42cd9c081b041b4c0873/FLAG2bf269ddc [2020-10-26 23:11:01,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:11:01,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label31.c [2020-10-26 23:11:01,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7fe6b22/7a21310fc87e42cd9c081b041b4c0873/FLAG2bf269ddc [2020-10-26 23:11:01,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e7fe6b22/7a21310fc87e42cd9c081b041b4c0873 [2020-10-26 23:11:01,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:11:01,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:11:01,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:11:01,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:11:01,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:11:01,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:01" (1/1) ... [2020-10-26 23:11:01,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab50f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:01, skipping insertion in model container [2020-10-26 23:11:01,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:11:01" (1/1) ... [2020-10-26 23:11:01,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:11:02,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:11:03,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:11:03,793 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:11:04,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:11:04,825 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:11:04,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04 WrapperNode [2020-10-26 23:11:04,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:11:04,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:11:04,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:11:04,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:11:04,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:04,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:04,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:04,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:05,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:05,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:05,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (1/1) ... [2020-10-26 23:11:05,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:11:05,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:11:05,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:11:05,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:11:05,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (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 [2020-10-26 23:11:05,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:11:05,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:11:05,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:11:05,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:11:05,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:11:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:11:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:11:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:11:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:11:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:11:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:11:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:11:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:11:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:11:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:11:16,103 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:11:16,104 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:11:16,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:11:16 BoogieIcfgContainer [2020-10-26 23:11:16,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:11:16,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:11:16,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:11:16,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:11:16,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:11:01" (1/3) ... [2020-10-26 23:11:16,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d97f1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:11:16, skipping insertion in model container [2020-10-26 23:11:16,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:11:04" (2/3) ... [2020-10-26 23:11:16,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d97f1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:11:16, skipping insertion in model container [2020-10-26 23:11:16,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:11:16" (3/3) ... [2020-10-26 23:11:16,121 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label31.c [2020-10-26 23:11:16,132 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:11:16,139 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:11:16,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:11:16,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:11:16,199 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:11:16,199 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:11:16,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:11:16,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:11:16,200 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:11:16,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:11:16,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:11:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:11:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 23:11:16,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:16,252 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] [2020-10-26 23:11:16,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 760869138, now seen corresponding path program 1 times [2020-10-26 23:11:16,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:16,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825017545] [2020-10-26 23:11:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:17,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:17,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 23:11:17,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-26 23:11:17,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 23:11:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:11:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:17,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:17,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:17,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:17,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:17,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:17,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825017545] [2020-10-26 23:11:17,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:17,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:11:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373530545] [2020-10-26 23:11:17,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:11:17,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:11:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:11:17,410 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:11:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:34,429 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-26 23:11:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:11:34,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-26 23:11:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:34,479 INFO L225 Difference]: With dead ends: 3157 [2020-10-26 23:11:34,479 INFO L226 Difference]: Without dead ends: 1955 [2020-10-26 23:11:34,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:11:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-26 23:11:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-26 23:11:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-26 23:11:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-26 23:11:34,689 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 47 [2020-10-26 23:11:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-26 23:11:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:11:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-26 23:11:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 23:11:34,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:34,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:34,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:11:34,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash -989127355, now seen corresponding path program 1 times [2020-10-26 23:11:34,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:34,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514770312] [2020-10-26 23:11:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:36,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:11:36,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:11:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1657 [2020-10-26 23:11:36,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:11:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:11:36,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:36,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:36,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:11:36,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:11:36,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:36,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:36,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:36,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:11:36,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 23:11:36,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:11:36,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:36,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514770312] [2020-10-26 23:11:36,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:36,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730343923] [2020-10-26 23:11:36,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:36,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:36,972 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 7 states. [2020-10-26 23:11:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:58,897 INFO L93 Difference]: Finished difference Result 5504 states and 9113 transitions. [2020-10-26 23:11:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:11:58,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-26 23:11:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:58,929 INFO L225 Difference]: With dead ends: 5504 [2020-10-26 23:11:58,929 INFO L226 Difference]: Without dead ends: 3624 [2020-10-26 23:11:58,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:11:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2020-10-26 23:11:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3579. [2020-10-26 23:11:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2020-10-26 23:11:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5196 transitions. [2020-10-26 23:11:59,089 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5196 transitions. Word has length 117 [2020-10-26 23:11:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:59,092 INFO L481 AbstractCegarLoop]: Abstraction has 3579 states and 5196 transitions. [2020-10-26 23:11:59,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5196 transitions. [2020-10-26 23:11:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 23:11:59,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:59,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:59,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:11:59,104 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -131787275, now seen corresponding path program 1 times [2020-10-26 23:11:59,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:59,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149741739] [2020-10-26 23:11:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:59,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:00,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:00,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 23:12:00,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:00,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-26 23:12:00,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 23:12:00,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:00,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:00,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:00,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:00,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:00,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:00,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 23:12:00,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:00,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 23:12:00,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:00,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 23:12:00,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149741739] [2020-10-26 23:12:00,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:00,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997915344] [2020-10-26 23:12:00,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:00,802 INFO L87 Difference]: Start difference. First operand 3579 states and 5196 transitions. Second operand 7 states. [2020-10-26 23:12:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:31,207 INFO L93 Difference]: Finished difference Result 10793 states and 15838 transitions. [2020-10-26 23:12:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:12:31,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-26 23:12:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:31,271 INFO L225 Difference]: With dead ends: 10793 [2020-10-26 23:12:31,273 INFO L226 Difference]: Without dead ends: 7220 [2020-10-26 23:12:31,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:12:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2020-10-26 23:12:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 7114. [2020-10-26 23:12:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7114 states. [2020-10-26 23:12:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 9763 transitions. [2020-10-26 23:12:31,568 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 9763 transitions. Word has length 120 [2020-10-26 23:12:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:31,570 INFO L481 AbstractCegarLoop]: Abstraction has 7114 states and 9763 transitions. [2020-10-26 23:12:31,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 9763 transitions. [2020-10-26 23:12:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 23:12:31,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:31,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:31,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:12:31,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -460776487, now seen corresponding path program 1 times [2020-10-26 23:12:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:31,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053041604] [2020-10-26 23:12:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:31,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-26 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:33,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:33,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:33,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:33,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:33,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:12:33,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:33,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:33,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:33,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:33,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:34,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:34,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:34,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:12:34,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:34,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 23:12:34,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:34,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:12:34,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:12:34,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053041604] [2020-10-26 23:12:34,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:12:34,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:12:34,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384538083] [2020-10-26 23:12:34,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:34,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:34,336 INFO L87 Difference]: Start difference. First operand 7114 states and 9763 transitions. Second operand 7 states. [2020-10-26 23:13:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:06,789 INFO L93 Difference]: Finished difference Result 15445 states and 21825 transitions. [2020-10-26 23:13:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:13:06,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-26 23:13:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:06,848 INFO L225 Difference]: With dead ends: 15445 [2020-10-26 23:13:06,849 INFO L226 Difference]: Without dead ends: 8337 [2020-10-26 23:13:06,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:13:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2020-10-26 23:13:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 8074. [2020-10-26 23:13:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-10-26 23:13:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 10384 transitions. [2020-10-26 23:13:07,181 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 10384 transitions. Word has length 122 [2020-10-26 23:13:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:07,183 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 10384 transitions. [2020-10-26 23:13:07,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 10384 transitions. [2020-10-26 23:13:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 23:13:07,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:07,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:07,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:13:07,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -389695043, now seen corresponding path program 1 times [2020-10-26 23:13:07,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:07,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959054762] [2020-10-26 23:13:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:07,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:08,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:08,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:13:08,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:08,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-26 23:13:08,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:13:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 23:13:08,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:08,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:08,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:08,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:08,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:08,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:08,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:08,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:13:08,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:13:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959054762] [2020-10-26 23:13:09,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:09,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:13:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57948302] [2020-10-26 23:13:09,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:09,073 INFO L87 Difference]: Start difference. First operand 8074 states and 10384 transitions. Second operand 7 states. [2020-10-26 23:13:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:40,602 INFO L93 Difference]: Finished difference Result 25714 states and 35752 transitions. [2020-10-26 23:13:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:13:40,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-26 23:13:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:40,689 INFO L225 Difference]: With dead ends: 25714 [2020-10-26 23:13:40,689 INFO L226 Difference]: Without dead ends: 18449 [2020-10-26 23:13:40,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:13:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18449 states. [2020-10-26 23:13:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18449 to 18353. [2020-10-26 23:13:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18353 states. [2020-10-26 23:13:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18353 states to 18353 states and 23987 transitions. [2020-10-26 23:13:41,165 INFO L78 Accepts]: Start accepts. Automaton has 18353 states and 23987 transitions. Word has length 124 [2020-10-26 23:13:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:41,165 INFO L481 AbstractCegarLoop]: Abstraction has 18353 states and 23987 transitions. [2020-10-26 23:13:41,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:13:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18353 states and 23987 transitions. [2020-10-26 23:13:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-26 23:13:41,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:41,172 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:41,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:13:41,173 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -685109900, now seen corresponding path program 1 times [2020-10-26 23:13:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080262487] [2020-10-26 23:13:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:41,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:41,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:46,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 23:13:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:13:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 23:13:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:13:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:46,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:46,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:46,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:46,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 23:13:46,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:46,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:46,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:46,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:46,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:46,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:13:46,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:46,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:13:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:47,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:47,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:13:47,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 23:13:47,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:13:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-26 23:13:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:13:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:13:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 78 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:13:47,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080262487] [2020-10-26 23:13:47,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:47,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:13:47,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029722013] [2020-10-26 23:13:47,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:47,397 INFO L87 Difference]: Start difference. First operand 18353 states and 23987 transitions. Second operand 7 states. [2020-10-26 23:13:47,546 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:13:49,720 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:14:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:12,455 INFO L93 Difference]: Finished difference Result 36420 states and 48268 transitions. [2020-10-26 23:14:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:14:12,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 275 [2020-10-26 23:14:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:12,529 INFO L225 Difference]: With dead ends: 36420 [2020-10-26 23:14:12,529 INFO L226 Difference]: Without dead ends: 18876 [2020-10-26 23:14:12,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:14:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18876 states. [2020-10-26 23:14:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18876 to 18604. [2020-10-26 23:14:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18604 states. [2020-10-26 23:14:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18604 states to 18604 states and 24457 transitions. [2020-10-26 23:14:13,050 INFO L78 Accepts]: Start accepts. Automaton has 18604 states and 24457 transitions. Word has length 275 [2020-10-26 23:14:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:13,050 INFO L481 AbstractCegarLoop]: Abstraction has 18604 states and 24457 transitions. [2020-10-26 23:14:13,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 18604 states and 24457 transitions. [2020-10-26 23:14:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-26 23:14:13,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:13,057 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:13,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:14:13,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash 32650171, now seen corresponding path program 1 times [2020-10-26 23:14:13,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:13,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6355806] [2020-10-26 23:14:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:13,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:13,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:14,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:14,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 23:14:14,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:14,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1549 [2020-10-26 23:14:14,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:14:14,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 23:14:14,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:14,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:14,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:14:14,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:14:14,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:14,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:15,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:15,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:14:15,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:14:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:15,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:14:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:15,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:15,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:14:15,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:15,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-26 23:14:15,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:15,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:15,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:15,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 23:14:15,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:14:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:14:15,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6355806] [2020-10-26 23:14:15,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:15,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:14:15,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104998057] [2020-10-26 23:14:15,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:15,743 INFO L87 Difference]: Start difference. First operand 18604 states and 24457 transitions. Second operand 7 states. [2020-10-26 23:14:15,921 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:14:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:49,725 INFO L93 Difference]: Finished difference Result 43160 states and 59244 transitions. [2020-10-26 23:14:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:14:49,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 282 [2020-10-26 23:14:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:49,833 INFO L225 Difference]: With dead ends: 43160 [2020-10-26 23:14:49,833 INFO L226 Difference]: Without dead ends: 25365 [2020-10-26 23:14:49,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:14:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25365 states. [2020-10-26 23:14:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25365 to 24861. [2020-10-26 23:14:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24861 states. [2020-10-26 23:14:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24861 states to 24861 states and 33077 transitions. [2020-10-26 23:14:50,441 INFO L78 Accepts]: Start accepts. Automaton has 24861 states and 33077 transitions. Word has length 282 [2020-10-26 23:14:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:50,443 INFO L481 AbstractCegarLoop]: Abstraction has 24861 states and 33077 transitions. [2020-10-26 23:14:50,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24861 states and 33077 transitions. [2020-10-26 23:14:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-26 23:14:50,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:50,455 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:50,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:14:50,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:50,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2127748599, now seen corresponding path program 1 times [2020-10-26 23:14:50,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:50,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730034397] [2020-10-26 23:14:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:50,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:51,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:51,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:53,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking...