/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:25:20,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:25:20,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:25:20,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:25:20,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:25:20,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:25:20,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:25:20,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:25:20,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:25:20,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:25:20,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:25:20,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:25:20,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:25:20,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:25:20,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:25:20,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:25:20,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:25:20,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:25:20,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:25:20,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:25:20,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:25:20,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:25:20,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:25:20,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:25:20,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:25:20,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:25:20,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:25:20,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:25:20,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:25:20,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:25:20,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:25:20,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:25:20,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:25:20,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:25:20,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:25:20,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:25:20,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:25:20,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:25:20,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:25:20,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:25:20,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:25:20,529 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 18:25:20,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:25:20,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:25:20,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:25:20,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:25:20,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:25:20,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:25:20,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:25:20,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:25:20,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:25:20,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:25:20,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:25:20,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:25:20,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:25:20,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:25:20,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:25:20,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:25:20,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:25:20,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:25:20,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:25:20,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:25:20,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:25:20,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:25:20,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:25:20,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:25:20,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:25:20,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:25:20,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:25:20,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:25:20,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:25:20,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:25:20,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:25:21,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:25:21,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:25:21,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:25:21,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:25:21,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label24.c [2020-10-27 18:25:21,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9cf7522a/e74af1d258754c228f4dbd6a01727f6e/FLAGe3fea0f72 [2020-10-27 18:25:22,013 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:25:22,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label24.c [2020-10-27 18:25:22,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9cf7522a/e74af1d258754c228f4dbd6a01727f6e/FLAGe3fea0f72 [2020-10-27 18:25:22,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9cf7522a/e74af1d258754c228f4dbd6a01727f6e [2020-10-27 18:25:22,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:25:22,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:25:22,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:25:22,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:25:22,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:25:22,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:25:22" (1/1) ... [2020-10-27 18:25:22,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb0b7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:22, skipping insertion in model container [2020-10-27 18:25:22,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:25:22" (1/1) ... [2020-10-27 18:25:22,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:25:22,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:25:23,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:25:23,250 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:25:23,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:25:23,558 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:25:23,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23 WrapperNode [2020-10-27 18:25:23,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:25:23,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:25:23,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:25:23,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:25:23,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (1/1) ... [2020-10-27 18:25:23,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:25:23,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:25:23,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:25:23,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:25:23,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (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 18:25:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:25:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:25:23,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:25:23,948 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:25:23,949 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:25:23,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:25:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:25:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:25:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:25:23,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:25:23,952 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:25:23,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:25:23,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:25:23,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:25:23,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:25:23,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:25:23,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:25:23,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:25:23,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:25:23,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:25:23,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:25:27,593 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:25:27,593 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:25:27,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:25:27 BoogieIcfgContainer [2020-10-27 18:25:27,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:25:27,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:25:27,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:25:27,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:25:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:25:22" (1/3) ... [2020-10-27 18:25:27,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcb88f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:25:27, skipping insertion in model container [2020-10-27 18:25:27,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:25:23" (2/3) ... [2020-10-27 18:25:27,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcb88f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:25:27, skipping insertion in model container [2020-10-27 18:25:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:25:27" (3/3) ... [2020-10-27 18:25:27,608 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label24.c [2020-10-27 18:25:27,622 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:25:27,628 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:25:27,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:25:27,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:25:27,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:25:27,677 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:25:27,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:25:27,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:25:27,678 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:25:27,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:25:27,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:25:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:25:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 18:25:27,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:25:27,718 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] [2020-10-27 18:25:27,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:25:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:25:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 164471775, now seen corresponding path program 1 times [2020-10-27 18:25:27,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:25:27,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744334671] [2020-10-27 18:25:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:25:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:28,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:28,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 18:25:28,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-27 18:25:28,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:25:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:25:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 18:25:28,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:25:28,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:25:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:28,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:28,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:25:28,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:28,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:25:28,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:28,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:25:28,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:28,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:25:28,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:29,015 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 18:25:29,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744334671] [2020-10-27 18:25:29,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:25:29,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:25:29,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526610811] [2020-10-27 18:25:29,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:25:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:25:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:25:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:25:29,052 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:25:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:25:35,329 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-27 18:25:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:25:35,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 18:25:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:25:35,358 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 18:25:35,359 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 18:25:35,374 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 18:25:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 18:25:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-27 18:25:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 18:25:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-27 18:25:35,490 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 45 [2020-10-27 18:25:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:25:35,491 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-27 18:25:35,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:25:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-27 18:25:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 18:25:35,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:25:35,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:35,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:25:35,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:25:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:25:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1803968348, now seen corresponding path program 1 times [2020-10-27 18:25:35,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:25:35,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824333352] [2020-10-27 18:25:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:25:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:35,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:36,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:37,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:37,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 18:25:37,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:25:37,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-10-27 18:25:37,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:25:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:25:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:25:37,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:25:37,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:25:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:37,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:37,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:25:37,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:37,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:25:37,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:37,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:25:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:25:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:25:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:25:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:37,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:37,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:37,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:25:37,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:37,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 18:25:37,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:25:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:25:37,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:25:37,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824333352] [2020-10-27 18:25:37,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:25:37,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:25:37,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627440766] [2020-10-27 18:25:37,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:25:37,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:25:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:25:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:25:37,732 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 5 states. [2020-10-27 18:25:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:25:44,035 INFO L93 Difference]: Finished difference Result 1714 states and 2604 transitions. [2020-10-27 18:25:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:25:44,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-27 18:25:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:25:44,052 INFO L225 Difference]: With dead ends: 1714 [2020-10-27 18:25:44,053 INFO L226 Difference]: Without dead ends: 1023 [2020-10-27 18:25:44,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:25:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-27 18:25:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1019. [2020-10-27 18:25:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-10-27 18:25:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1397 transitions. [2020-10-27 18:25:44,144 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1397 transitions. Word has length 124 [2020-10-27 18:25:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:25:44,147 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1397 transitions. [2020-10-27 18:25:44,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:25:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1397 transitions. [2020-10-27 18:25:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 18:25:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:25:44,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:44,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:25:44,166 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:25:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:25:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash 115322666, now seen corresponding path program 1 times [2020-10-27 18:25:44,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:25:44,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866856012] [2020-10-27 18:25:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:25:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:44,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:25:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:25:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-27 18:25:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:25:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:25:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:25:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:45,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:25:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:45,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:45,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:25:45,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:45,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:25:45,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:45,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:25:45,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:45,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:25:45,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:25:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:45,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:45,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:45,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:25:45,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:45,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 18:25:45,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:25:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:25:45,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:25:45,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866856012] [2020-10-27 18:25:45,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:25:45,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:25:45,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790019291] [2020-10-27 18:25:45,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:25:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:25:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:25:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:25:45,973 INFO L87 Difference]: Start difference. First operand 1019 states and 1397 transitions. Second operand 5 states. [2020-10-27 18:25:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:25:55,544 INFO L93 Difference]: Finished difference Result 2967 states and 4104 transitions. [2020-10-27 18:25:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:25:55,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 18:25:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:25:55,558 INFO L225 Difference]: With dead ends: 2967 [2020-10-27 18:25:55,558 INFO L226 Difference]: Without dead ends: 1954 [2020-10-27 18:25:55,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:25:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-27 18:25:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1948. [2020-10-27 18:25:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-10-27 18:25:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2428 transitions. [2020-10-27 18:25:55,625 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2428 transitions. Word has length 161 [2020-10-27 18:25:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:25:55,626 INFO L481 AbstractCegarLoop]: Abstraction has 1948 states and 2428 transitions. [2020-10-27 18:25:55,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:25:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2428 transitions. [2020-10-27 18:25:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 18:25:55,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:25:55,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:55,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:25:55,630 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:25:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:25:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -598752207, now seen corresponding path program 1 times [2020-10-27 18:25:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:25:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976622945] [2020-10-27 18:25:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:25:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:55,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:56,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:56,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 18:25:56,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:25:56,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-27 18:25:56,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:25:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:25:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 18:25:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:57,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:25:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:57,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:57,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:57,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:25:57,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:57,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:25:57,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:25:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:25:57,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:25:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:25:57,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:25:57,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:25:57,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:25:57,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:25:57,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 18:25:57,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:25:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:25:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:25:57,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976622945] [2020-10-27 18:25:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:25:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:25:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876934910] [2020-10-27 18:25:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:25:57,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:25:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:25:57,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:25:57,437 INFO L87 Difference]: Start difference. First operand 1948 states and 2428 transitions. Second operand 5 states. [2020-10-27 18:26:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:07,662 INFO L93 Difference]: Finished difference Result 5472 states and 6954 transitions. [2020-10-27 18:26:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:07,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-27 18:26:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:07,685 INFO L225 Difference]: With dead ends: 5472 [2020-10-27 18:26:07,685 INFO L226 Difference]: Without dead ends: 3530 [2020-10-27 18:26:07,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:26:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2020-10-27 18:26:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3518. [2020-10-27 18:26:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3518 states. [2020-10-27 18:26:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 4399 transitions. [2020-10-27 18:26:07,821 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 4399 transitions. Word has length 168 [2020-10-27 18:26:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:07,821 INFO L481 AbstractCegarLoop]: Abstraction has 3518 states and 4399 transitions. [2020-10-27 18:26:07,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 4399 transitions. [2020-10-27 18:26:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 18:26:07,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:07,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:07,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:26:07,826 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1646827247, now seen corresponding path program 1 times [2020-10-27 18:26:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:07,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279426170] [2020-10-27 18:26:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:08,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:09,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:09,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:09,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 18:26:09,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:09,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:09,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:09,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:09,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:09,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:09,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:09,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:26:09,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:09,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 18:26:09,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:26:09,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:09,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279426170] [2020-10-27 18:26:09,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:09,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:09,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597485884] [2020-10-27 18:26:09,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:09,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:09,733 INFO L87 Difference]: Start difference. First operand 3518 states and 4399 transitions. Second operand 5 states. [2020-10-27 18:26:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:19,574 INFO L93 Difference]: Finished difference Result 8592 states and 11077 transitions. [2020-10-27 18:26:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:19,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-27 18:26:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:19,604 INFO L225 Difference]: With dead ends: 8592 [2020-10-27 18:26:19,604 INFO L226 Difference]: Without dead ends: 5080 [2020-10-27 18:26:19,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:26:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2020-10-27 18:26:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4768. [2020-10-27 18:26:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4768 states. [2020-10-27 18:26:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 6077 transitions. [2020-10-27 18:26:19,777 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 6077 transitions. Word has length 168 [2020-10-27 18:26:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:19,778 INFO L481 AbstractCegarLoop]: Abstraction has 4768 states and 6077 transitions. [2020-10-27 18:26:19,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 6077 transitions. [2020-10-27 18:26:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 18:26:19,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:19,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:19,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:26:19,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1273519272, now seen corresponding path program 1 times [2020-10-27 18:26:19,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:19,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851378673] [2020-10-27 18:26:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:20,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:20,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 18:26:20,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-27 18:26:20,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:20,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:20,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:20,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:26:20,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:20,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:20,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:26:20,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:20,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 18:26:20,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:20,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:20,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:26:20,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 18:26:20,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:21,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851378673] [2020-10-27 18:26:21,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:26:21,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:26:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048362048] [2020-10-27 18:26:21,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:26:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:26:21,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:26:21,185 INFO L87 Difference]: Start difference. First operand 4768 states and 6077 transitions. Second operand 7 states. [2020-10-27 18:26:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:31,458 INFO L93 Difference]: Finished difference Result 12137 states and 16145 transitions. [2020-10-27 18:26:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:26:31,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2020-10-27 18:26:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:31,499 INFO L225 Difference]: With dead ends: 12137 [2020-10-27 18:26:31,499 INFO L226 Difference]: Without dead ends: 7375 [2020-10-27 18:26:31,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:26:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7375 states. [2020-10-27 18:26:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7375 to 7325. [2020-10-27 18:26:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7325 states. [2020-10-27 18:26:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7325 states to 7325 states and 9091 transitions. [2020-10-27 18:26:31,744 INFO L78 Accepts]: Start accepts. Automaton has 7325 states and 9091 transitions. Word has length 195 [2020-10-27 18:26:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:31,745 INFO L481 AbstractCegarLoop]: Abstraction has 7325 states and 9091 transitions. [2020-10-27 18:26:31,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:26:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7325 states and 9091 transitions. [2020-10-27 18:26:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-27 18:26:31,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:31,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:31,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:26:31,752 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash 792890707, now seen corresponding path program 1 times [2020-10-27 18:26:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:31,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944881348] [2020-10-27 18:26:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:31,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:33,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:33,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-27 18:26:33,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:26:33,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-27 18:26:33,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:33,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:33,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-27 18:26:33,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:26:33,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:33,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:33,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:33,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:33,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:34,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:34,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:34,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 18:26:34,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:34,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-27 18:26:34,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:34,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-27 18:26:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:26:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:34,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944881348] [2020-10-27 18:26:34,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:34,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:34,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600565598] [2020-10-27 18:26:34,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:34,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:34,609 INFO L87 Difference]: Start difference. First operand 7325 states and 9091 transitions. Second operand 5 states. [2020-10-27 18:26:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:44,677 INFO L93 Difference]: Finished difference Result 18649 states and 23530 transitions. [2020-10-27 18:26:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:44,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-27 18:26:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:44,754 INFO L225 Difference]: With dead ends: 18649 [2020-10-27 18:26:44,754 INFO L226 Difference]: Without dead ends: 11330 [2020-10-27 18:26:44,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:26:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2020-10-27 18:26:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 9488. [2020-10-27 18:26:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9488 states. [2020-10-27 18:26:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 11650 transitions. [2020-10-27 18:26:45,084 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 11650 transitions. Word has length 319 [2020-10-27 18:26:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:45,085 INFO L481 AbstractCegarLoop]: Abstraction has 9488 states and 11650 transitions. [2020-10-27 18:26:45,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 11650 transitions. [2020-10-27 18:26:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-27 18:26:45,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:45,095 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:26:45,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:26:45,096 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash 152970767, now seen corresponding path program 1 times [2020-10-27 18:26:45,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:45,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185000258] [2020-10-27 18:26:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:45,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:47,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:50,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:50,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-27 18:26:50,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:26:50,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 18:26:50,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-10-27 18:26:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:26:50,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:50,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:50,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:50,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:50,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:50,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:50,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:26:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 18:26:50,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:50,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:26:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:50,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:26:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-27 18:26:50,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185000258] [2020-10-27 18:26:50,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:50,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:50,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076061317] [2020-10-27 18:26:50,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:50,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:50,989 INFO L87 Difference]: Start difference. First operand 9488 states and 11650 transitions. Second operand 5 states. [2020-10-27 18:27:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:01,312 INFO L93 Difference]: Finished difference Result 20816 states and 25781 transitions. [2020-10-27 18:27:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:01,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 344 [2020-10-27 18:27:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:01,357 INFO L225 Difference]: With dead ends: 20816 [2020-10-27 18:27:01,357 INFO L226 Difference]: Without dead ends: 11334 [2020-10-27 18:27:01,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11334 states. [2020-10-27 18:27:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11334 to 11330. [2020-10-27 18:27:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11330 states. [2020-10-27 18:27:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11330 states to 11330 states and 13785 transitions. [2020-10-27 18:27:01,723 INFO L78 Accepts]: Start accepts. Automaton has 11330 states and 13785 transitions. Word has length 344 [2020-10-27 18:27:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:01,724 INFO L481 AbstractCegarLoop]: Abstraction has 11330 states and 13785 transitions. [2020-10-27 18:27:01,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11330 states and 13785 transitions. [2020-10-27 18:27:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-27 18:27:01,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:01,741 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:01,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:27:01,741 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:01,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1962349809, now seen corresponding path program 1 times [2020-10-27 18:27:01,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:01,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639039325] [2020-10-27 18:27:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:01,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:02,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:06,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:06,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 292 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 18:27:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:07,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:27:07,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:07,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:27:07,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 18:27:07,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:07,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:27:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:27:07,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 18:27:07,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:27:07,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-10-27 18:27:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 18:27:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 18:27:07,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639039325] [2020-10-27 18:27:07,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:07,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:27:07,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337929573] [2020-10-27 18:27:07,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:27:07,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:27:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:27:07,842 INFO L87 Difference]: Start difference. First operand 11330 states and 13785 transitions. Second operand 7 states. [2020-10-27 18:27:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:19,649 INFO L93 Difference]: Finished difference Result 25241 states and 31225 transitions. [2020-10-27 18:27:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:27:19,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 425 [2020-10-27 18:27:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:19,713 INFO L225 Difference]: With dead ends: 25241 [2020-10-27 18:27:19,713 INFO L226 Difference]: Without dead ends: 13917 [2020-10-27 18:27:19,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:27:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2020-10-27 18:27:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 12679. [2020-10-27 18:27:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12679 states. [2020-10-27 18:27:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12679 states to 12679 states and 15576 transitions. [2020-10-27 18:27:20,171 INFO L78 Accepts]: Start accepts. Automaton has 12679 states and 15576 transitions. Word has length 425 [2020-10-27 18:27:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:20,172 INFO L481 AbstractCegarLoop]: Abstraction has 12679 states and 15576 transitions. [2020-10-27 18:27:20,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:27:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12679 states and 15576 transitions. [2020-10-27 18:27:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-10-27 18:27:20,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:20,187 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:20,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:27:20,188 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash 124214864, now seen corresponding path program 1 times [2020-10-27 18:27:20,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:20,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414344523] [2020-10-27 18:27:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:20,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 446 [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 399 [2020-10-27 18:27:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:27:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:25,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:25,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:25,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:25,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:25,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:27:25,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:25,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 18:27:25,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:25,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:27:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:25,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:25,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:25,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-10-27 18:27:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:25,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 18:27:25,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 114 proven. 3 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-27 18:27:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414344523] [2020-10-27 18:27:25,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:25,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777880988] [2020-10-27 18:27:25,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:25,916 INFO L87 Difference]: Start difference. First operand 12679 states and 15576 transitions. Second operand 5 states. [2020-10-27 18:27:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:42,974 INFO L93 Difference]: Finished difference Result 30044 states and 37275 transitions. [2020-10-27 18:27:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:42,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 430 [2020-10-27 18:27:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:43,047 INFO L225 Difference]: With dead ends: 30044 [2020-10-27 18:27:43,047 INFO L226 Difference]: Without dead ends: 17371 [2020-10-27 18:27:43,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2020-10-27 18:27:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 17053. [2020-10-27 18:27:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17053 states. [2020-10-27 18:27:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17053 states to 17053 states and 20690 transitions. [2020-10-27 18:27:43,591 INFO L78 Accepts]: Start accepts. Automaton has 17053 states and 20690 transitions. Word has length 430 [2020-10-27 18:27:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:43,592 INFO L481 AbstractCegarLoop]: Abstraction has 17053 states and 20690 transitions. [2020-10-27 18:27:43,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17053 states and 20690 transitions. [2020-10-27 18:27:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-27 18:27:43,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:43,614 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:27:43,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:27:43,615 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1288156663, now seen corresponding path program 1 times [2020-10-27 18:27:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:43,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995937285] [2020-10-27 18:27:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:43,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:44,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:48,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:48,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 492 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 445 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:27:48,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:48,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:48,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:48,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:48,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:48,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:27:48,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:48,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:49,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:49,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:27:49,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:49,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:27:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:49,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:27:49,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:49,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-10-27 18:27:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:49,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:49,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 18:27:49,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 18:27:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 114 proven. 3 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-10-27 18:27:49,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995937285] [2020-10-27 18:27:49,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760066521] [2020-10-27 18:27:49,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:49,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:49,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:49,490 INFO L87 Difference]: Start difference. First operand 17053 states and 20690 transitions. Second operand 5 states. [2020-10-27 18:27:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:59,751 INFO L93 Difference]: Finished difference Result 42152 states and 51687 transitions. [2020-10-27 18:27:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:59,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-10-27 18:27:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:59,815 INFO L225 Difference]: With dead ends: 42152 [2020-10-27 18:27:59,816 INFO L226 Difference]: Without dead ends: 21348 [2020-10-27 18:27:59,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21348 states. [2020-10-27 18:28:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21348 to 19194. [2020-10-27 18:28:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19194 states. [2020-10-27 18:28:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19194 states to 19194 states and 22241 transitions. [2020-10-27 18:28:00,237 INFO L78 Accepts]: Start accepts. Automaton has 19194 states and 22241 transitions. Word has length 476 [2020-10-27 18:28:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:00,238 INFO L481 AbstractCegarLoop]: Abstraction has 19194 states and 22241 transitions. [2020-10-27 18:28:00,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:28:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 19194 states and 22241 transitions. [2020-10-27 18:28:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-27 18:28:00,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:00,263 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:00,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:28:00,263 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1326227742, now seen corresponding path program 1 times [2020-10-27 18:28:00,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:00,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874091556] [2020-10-27 18:28:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:05,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:05,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-27 18:28:05,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:28:05,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 18:28:05,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:05,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:05,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-27 18:28:05,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-27 18:28:05,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:05,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:05,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:05,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:05,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:05,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:05,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:28:05,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:05,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:05,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:28:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:05,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:05,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:28:05,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:05,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-10-27 18:28:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:06,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:06,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 18:28:06,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:28:06,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874091556] [2020-10-27 18:28:06,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:06,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:28:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132010073] [2020-10-27 18:28:06,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:28:06,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:28:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:28:06,371 INFO L87 Difference]: Start difference. First operand 19194 states and 22241 transitions. Second operand 7 states. [2020-10-27 18:28:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:18,487 INFO L93 Difference]: Finished difference Result 38970 states and 46561 transitions. [2020-10-27 18:28:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:28:18,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 480 [2020-10-27 18:28:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:18,575 INFO L225 Difference]: With dead ends: 38970 [2020-10-27 18:28:18,575 INFO L226 Difference]: Without dead ends: 19782 [2020-10-27 18:28:18,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:28:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2020-10-27 18:28:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 19217. [2020-10-27 18:28:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19217 states. [2020-10-27 18:28:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19217 states to 19217 states and 22120 transitions. [2020-10-27 18:28:19,228 INFO L78 Accepts]: Start accepts. Automaton has 19217 states and 22120 transitions. Word has length 480 [2020-10-27 18:28:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:19,229 INFO L481 AbstractCegarLoop]: Abstraction has 19217 states and 22120 transitions. [2020-10-27 18:28:19,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:28:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19217 states and 22120 transitions. [2020-10-27 18:28:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2020-10-27 18:28:19,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:19,261 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:19,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:28:19,261 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1729779821, now seen corresponding path program 1 times [2020-10-27 18:28:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:19,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450569436] [2020-10-27 18:28:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:19,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:21,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:21,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:22,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 598 [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:24,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 551 [2020-10-27 18:28:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:28:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:24,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:24,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:28:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:24,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:24,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:28:24,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:28:24,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-10-27 18:28:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:24,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:25,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-27 18:28:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 114 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-27 18:28:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450569436] [2020-10-27 18:28:25,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:28:25,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222173570] [2020-10-27 18:28:25,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:28:25,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:25,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:28:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:28:25,340 INFO L87 Difference]: Start difference. First operand 19217 states and 22120 transitions. Second operand 5 states. [2020-10-27 18:28:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:33,240 INFO L93 Difference]: Finished difference Result 45194 states and 52477 transitions. [2020-10-27 18:28:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:28:33,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 582 [2020-10-27 18:28:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:33,316 INFO L225 Difference]: With dead ends: 45194 [2020-10-27 18:28:33,317 INFO L226 Difference]: Without dead ends: 26298 [2020-10-27 18:28:33,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:28:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26298 states. [2020-10-27 18:28:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26298 to 22304. [2020-10-27 18:28:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22304 states. [2020-10-27 18:28:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22304 states to 22304 states and 25595 transitions. [2020-10-27 18:28:33,821 INFO L78 Accepts]: Start accepts. Automaton has 22304 states and 25595 transitions. Word has length 582 [2020-10-27 18:28:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:33,822 INFO L481 AbstractCegarLoop]: Abstraction has 22304 states and 25595 transitions. [2020-10-27 18:28:33,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:28:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22304 states and 25595 transitions. [2020-10-27 18:28:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2020-10-27 18:28:33,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:33,969 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:33,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:28:33,969 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:33,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1342188069, now seen corresponding path program 1 times [2020-10-27 18:28:33,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:33,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885240788] [2020-10-27 18:28:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:34,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 612 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-27 18:28:39,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:28:39,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:39,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:39,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:39,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:39,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:28:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:28:39,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:39,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-10-27 18:28:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:39,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:28:39,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:39,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:28:39,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:28:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 18:28:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 407 [2020-10-27 18:28:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:39,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:39,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:28:39,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:39,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 18:28:39,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 18:28:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 354 proven. 113 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-10-27 18:28:40,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885240788] [2020-10-27 18:28:40,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:40,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:28:40,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507303608] [2020-10-27 18:28:40,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:28:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:28:40,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:28:40,318 INFO L87 Difference]: Start difference. First operand 22304 states and 25595 transitions. Second operand 7 states. [2020-10-27 18:28:42,596 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 18:28:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:50,183 INFO L93 Difference]: Finished difference Result 45873 states and 54675 transitions. [2020-10-27 18:28:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:28:50,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 594 [2020-10-27 18:28:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:50,258 INFO L225 Difference]: With dead ends: 45873 [2020-10-27 18:28:50,259 INFO L226 Difference]: Without dead ends: 23890 [2020-10-27 18:28:50,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:28:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23890 states. [2020-10-27 18:28:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23890 to 23586. [2020-10-27 18:28:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23586 states. [2020-10-27 18:28:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23586 states to 23586 states and 26982 transitions. [2020-10-27 18:28:50,862 INFO L78 Accepts]: Start accepts. Automaton has 23586 states and 26982 transitions. Word has length 594 [2020-10-27 18:28:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:50,863 INFO L481 AbstractCegarLoop]: Abstraction has 23586 states and 26982 transitions. [2020-10-27 18:28:50,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:28:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 23586 states and 26982 transitions. [2020-10-27 18:28:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-10-27 18:28:50,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:50,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:50,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 18:28:50,896 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1547525646, now seen corresponding path program 1 times [2020-10-27 18:28:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543141281] [2020-10-27 18:28:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:51,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 613 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-27 18:28:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 18:28:56,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:28:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:28:56,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:28:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:28:56,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:28:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:28:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-27 18:28:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:28:56,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 18:28:56,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:28:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 18:28:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-10-27 18:28:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:57,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:57,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:28:57,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:57,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:28:57,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 18:28:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:57,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 353 proven. 113 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-27 18:28:57,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543141281] [2020-10-27 18:28:57,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:57,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:28:57,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480473378] [2020-10-27 18:28:57,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:28:57,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:28:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:28:57,464 INFO L87 Difference]: Start difference. First operand 23586 states and 26982 transitions. Second operand 8 states. [2020-10-27 18:28:59,901 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:29:01,463 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67