/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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:34:08,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:34:08,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:34:08,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:34:08,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:34:08,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:34:08,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:34:08,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:34:08,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:34:08,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:34:08,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:34:08,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:34:08,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:34:08,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:34:08,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:34:08,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:34:08,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:34:08,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:34:08,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:34:08,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:34:08,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:34:08,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:34:08,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:34:08,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:34:08,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:34:08,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:34:08,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:34:08,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:34:08,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:34:08,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:34:08,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:34:08,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:34:08,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:34:08,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:34:08,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:34:08,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:34:08,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:34:08,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:34:08,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:34:08,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:34:08,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:34:08,499 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 18:34:08,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:34:08,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:34:08,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:34:08,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:34:08,563 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:34:08,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:34:08,563 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:34:08,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:34:08,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:34:08,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:34:08,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:34:08,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:34:08,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:34:08,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:34:08,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:34:08,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:34:08,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:34:08,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:34:08,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:34:08,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:34:08,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:34:08,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:34:08,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:34:08,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:34:08,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:34:08,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:34:08,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:34:08,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:34:08,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:34:08,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:34:09,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:34:09,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:34:09,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:34:09,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:34:09,080 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:34:09,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-27 18:34:09,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edd33896/e52c6ad3377a4b938d45c31c0ec55bea/FLAG63764e48f [2020-10-27 18:34:09,969 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:34:09,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-27 18:34:10,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edd33896/e52c6ad3377a4b938d45c31c0ec55bea/FLAG63764e48f [2020-10-27 18:34:10,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4edd33896/e52c6ad3377a4b938d45c31c0ec55bea [2020-10-27 18:34:10,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:34:10,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:34:10,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:34:10,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:34:10,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:34:10,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:34:10" (1/1) ... [2020-10-27 18:34:10,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f78def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:10, skipping insertion in model container [2020-10-27 18:34:10,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:34:10" (1/1) ... [2020-10-27 18:34:10,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:34:10,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:34:11,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:34:11,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:34:11,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:34:11,503 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:34:11,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11 WrapperNode [2020-10-27 18:34:11,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:34:11,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:34:11,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:34:11,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:34:11,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (1/1) ... [2020-10-27 18:34:11,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:34:11,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:34:11,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:34:11,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:34:11,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (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 18:34:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:34:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:34:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:34:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:34:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:34:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:34:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:34:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:34:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:34:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:34:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:34:15,060 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:34:15,061 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:34:15,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:34:15 BoogieIcfgContainer [2020-10-27 18:34:15,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:34:15,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:34:15,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:34:15,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:34:15,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:34:10" (1/3) ... [2020-10-27 18:34:15,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3417bc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:34:15, skipping insertion in model container [2020-10-27 18:34:15,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:34:11" (2/3) ... [2020-10-27 18:34:15,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3417bc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:34:15, skipping insertion in model container [2020-10-27 18:34:15,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:34:15" (3/3) ... [2020-10-27 18:34:15,076 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label59.c [2020-10-27 18:34:15,091 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:34:15,098 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:34:15,115 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:34:15,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:34:15,149 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:34:15,149 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:34:15,149 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:34:15,149 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:34:15,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:34:15,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:34:15,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:34:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:34:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 18:34:15,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:15,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:15,197 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 733240863, now seen corresponding path program 1 times [2020-10-27 18:34:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:15,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808704905] [2020-10-27 18:34:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:16,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:16,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:34:16,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-27 18:34:16,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:34:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:34:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:34:16,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:34:16,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:16,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:16,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:16,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 18:34:16,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:34:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:16,625 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 18:34:16,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808704905] [2020-10-27 18:34:16,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:34:16,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:34:16,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538248969] [2020-10-27 18:34:16,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:34:16,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:34:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:34:16,667 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:34:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:25,687 INFO L93 Difference]: Finished difference Result 1250 states and 2231 transitions. [2020-10-27 18:34:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:25,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 18:34:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:25,717 INFO L225 Difference]: With dead ends: 1250 [2020-10-27 18:34:25,717 INFO L226 Difference]: Without dead ends: 730 [2020-10-27 18:34:25,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-10-27 18:34:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 713. [2020-10-27 18:34:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-27 18:34:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1207 transitions. [2020-10-27 18:34:25,848 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1207 transitions. Word has length 61 [2020-10-27 18:34:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:25,849 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1207 transitions. [2020-10-27 18:34:25,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:34:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1207 transitions. [2020-10-27 18:34:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 18:34:25,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:25,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 18:34:25,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:34:25,861 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1522390967, now seen corresponding path program 1 times [2020-10-27 18:34:25,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:25,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896284417] [2020-10-27 18:34:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:26,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:28,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:28,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 18:34:28,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:28,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3009 [2020-10-27 18:34:28,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:34:28,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:34:28,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:29,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:29,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:29,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:34:29,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:29,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:29,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:29,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:29,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:29,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:34:29,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 18:34:29,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:34:29,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896284417] [2020-10-27 18:34:29,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:29,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:29,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252230592] [2020-10-27 18:34:29,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:29,335 INFO L87 Difference]: Start difference. First operand 713 states and 1207 transitions. Second operand 5 states. [2020-10-27 18:34:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:40,061 INFO L93 Difference]: Finished difference Result 2065 states and 3552 transitions. [2020-10-27 18:34:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:40,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-27 18:34:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:40,074 INFO L225 Difference]: With dead ends: 2065 [2020-10-27 18:34:40,075 INFO L226 Difference]: Without dead ends: 1358 [2020-10-27 18:34:40,078 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 18:34:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2020-10-27 18:34:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1353. [2020-10-27 18:34:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2020-10-27 18:34:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2092 transitions. [2020-10-27 18:34:40,148 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2092 transitions. Word has length 130 [2020-10-27 18:34:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:40,149 INFO L481 AbstractCegarLoop]: Abstraction has 1353 states and 2092 transitions. [2020-10-27 18:34:40,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2092 transitions. [2020-10-27 18:34:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 18:34:40,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:40,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:40,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:34:40,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 313753430, now seen corresponding path program 1 times [2020-10-27 18:34:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135351193] [2020-10-27 18:34:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:41,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:41,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:34:41,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1111 [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:34:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:41,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:41,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:41,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:41,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:41,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:41,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:34:41,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:41,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:41,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:41,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:41,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:41,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:41,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:34:41,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:34:41,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:41,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 18:34:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:41,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135351193] [2020-10-27 18:34:41,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:41,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:34:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446938243] [2020-10-27 18:34:41,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:34:41,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:34:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:41,683 INFO L87 Difference]: Start difference. First operand 1353 states and 2092 transitions. Second operand 6 states. [2020-10-27 18:34:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:52,829 INFO L93 Difference]: Finished difference Result 3951 states and 6225 transitions. [2020-10-27 18:34:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:52,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-10-27 18:34:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:52,851 INFO L225 Difference]: With dead ends: 3951 [2020-10-27 18:34:52,851 INFO L226 Difference]: Without dead ends: 2604 [2020-10-27 18:34:52,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:34:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2020-10-27 18:34:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2592. [2020-10-27 18:34:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2592 states. [2020-10-27 18:34:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3971 transitions. [2020-10-27 18:34:52,948 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3971 transitions. Word has length 151 [2020-10-27 18:34:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 2592 states and 3971 transitions. [2020-10-27 18:34:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:34:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3971 transitions. [2020-10-27 18:34:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 18:34:52,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:52,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:52,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:34:52,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1423994077, now seen corresponding path program 1 times [2020-10-27 18:34:52,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:52,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308505590] [2020-10-27 18:34:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 18:34:53,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:53,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 18:34:53,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:34:53,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:34:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 18:34:53,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 18:34:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:53,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:34:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:53,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:53,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:34:53,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:53,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 18:34:53,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:53,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:34:53,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:34:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308505590] [2020-10-27 18:34:53,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:34:53,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:34:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468391316] [2020-10-27 18:34:53,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:34:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:34:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:34:53,982 INFO L87 Difference]: Start difference. First operand 2592 states and 3971 transitions. Second operand 7 states. [2020-10-27 18:35:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:10,684 INFO L93 Difference]: Finished difference Result 6151 states and 9577 transitions. [2020-10-27 18:35:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:10,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2020-10-27 18:35:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:10,711 INFO L225 Difference]: With dead ends: 6151 [2020-10-27 18:35:10,711 INFO L226 Difference]: Without dead ends: 3565 [2020-10-27 18:35:10,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:35:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2020-10-27 18:35:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 3544. [2020-10-27 18:35:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3544 states. [2020-10-27 18:35:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5286 transitions. [2020-10-27 18:35:10,862 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5286 transitions. Word has length 152 [2020-10-27 18:35:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:10,862 INFO L481 AbstractCegarLoop]: Abstraction has 3544 states and 5286 transitions. [2020-10-27 18:35:10,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5286 transitions. [2020-10-27 18:35:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 18:35:10,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:10,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:10,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:35:10,870 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash 110209314, now seen corresponding path program 1 times [2020-10-27 18:35:10,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:10,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863742456] [2020-10-27 18:35:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:11,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:11,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 18:35:11,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:35:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:11,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:11,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:11,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:11,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:11,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 18:35:11,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:35:11,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:11,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:11,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:11,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:11,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:35:11,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:35:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863742456] [2020-10-27 18:35:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:35:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:35:12,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919076175] [2020-10-27 18:35:12,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:12,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:12,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:12,009 INFO L87 Difference]: Start difference. First operand 3544 states and 5286 transitions. Second operand 7 states. [2020-10-27 18:35:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:20,778 INFO L93 Difference]: Finished difference Result 6538 states and 10163 transitions. [2020-10-27 18:35:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:35:20,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2020-10-27 18:35:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:20,804 INFO L225 Difference]: With dead ends: 6538 [2020-10-27 18:35:20,805 INFO L226 Difference]: Without dead ends: 3307 [2020-10-27 18:35:20,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2020-10-27 18:35:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3263. [2020-10-27 18:35:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2020-10-27 18:35:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4459 transitions. [2020-10-27 18:35:20,928 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4459 transitions. Word has length 164 [2020-10-27 18:35:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:20,929 INFO L481 AbstractCegarLoop]: Abstraction has 3263 states and 4459 transitions. [2020-10-27 18:35:20,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4459 transitions. [2020-10-27 18:35:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-27 18:35:20,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:20,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:20,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:35:20,936 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash 82969554, now seen corresponding path program 1 times [2020-10-27 18:35:20,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917031979] [2020-10-27 18:35:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:21,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:26,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:26,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:35:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:26,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:26,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:26,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:26,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:26,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:26,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:26,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:35:26,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:26,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 18:35:26,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:26,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:26,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 18:35:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:26,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:26,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:35:26,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:26,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 18:35:26,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:35:26,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 18:35:26,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917031979] [2020-10-27 18:35:26,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:26,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:35:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78267911] [2020-10-27 18:35:26,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:35:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:35:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:35:26,648 INFO L87 Difference]: Start difference. First operand 3263 states and 4459 transitions. Second operand 5 states. [2020-10-27 18:35:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:36,731 INFO L93 Difference]: Finished difference Result 8724 states and 12145 transitions. [2020-10-27 18:35:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:35:36,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-27 18:35:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:36,760 INFO L225 Difference]: With dead ends: 8724 [2020-10-27 18:35:36,761 INFO L226 Difference]: Without dead ends: 5774 [2020-10-27 18:35:36,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 18:35:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2020-10-27 18:35:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 4533. [2020-10-27 18:35:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4533 states. [2020-10-27 18:35:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 6269 transitions. [2020-10-27 18:35:36,917 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 6269 transitions. Word has length 247 [2020-10-27 18:35:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:36,917 INFO L481 AbstractCegarLoop]: Abstraction has 4533 states and 6269 transitions. [2020-10-27 18:35:36,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:35:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 6269 transitions. [2020-10-27 18:35:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-27 18:35:36,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:36,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:35:36,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:35:36,926 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 663715320, now seen corresponding path program 1 times [2020-10-27 18:35:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:36,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401492954] [2020-10-27 18:35:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:36,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2348 [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:39,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:35:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:35:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,493 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:35:39,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:39,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:35:39,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:35:39,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 18:35:39,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:35:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:35:39,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:35:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:39,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:39,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:35:39,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:39,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 18:35:39,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:39,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:39,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:39,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:35:39,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401492954] [2020-10-27 18:35:40,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:40,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:40,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888538200] [2020-10-27 18:35:40,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:40,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:40,091 INFO L87 Difference]: Start difference. First operand 4533 states and 6269 transitions. Second operand 7 states. [2020-10-27 18:35:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:55,021 INFO L93 Difference]: Finished difference Result 10252 states and 15931 transitions. [2020-10-27 18:35:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:35:55,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 268 [2020-10-27 18:35:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:55,072 INFO L225 Difference]: With dead ends: 10252 [2020-10-27 18:35:55,072 INFO L226 Difference]: Without dead ends: 6032 [2020-10-27 18:35:55,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6032 states. [2020-10-27 18:35:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6032 to 5819. [2020-10-27 18:35:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5819 states. [2020-10-27 18:35:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 7948 transitions. [2020-10-27 18:35:55,369 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 7948 transitions. Word has length 268 [2020-10-27 18:35:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:55,370 INFO L481 AbstractCegarLoop]: Abstraction has 5819 states and 7948 transitions. [2020-10-27 18:35:55,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 7948 transitions. [2020-10-27 18:35:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-27 18:35:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:55,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:35:55,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:35:55,381 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1038345214, now seen corresponding path program 1 times [2020-10-27 18:35:55,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:55,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259269452] [2020-10-27 18:35:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:55,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:58,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:58,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:35:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:35:58,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:58,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:58,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:58,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:58,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:58,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:35:58,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:58,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 18:35:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:35:58,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:35:58,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 18:35:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:58,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:58,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:35:58,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 18:35:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:35:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:35:58,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259269452] [2020-10-27 18:35:58,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:58,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:35:58,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311454382] [2020-10-27 18:35:58,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:35:58,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:58,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:35:58,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:35:58,996 INFO L87 Difference]: Start difference. First operand 5819 states and 7948 transitions. Second operand 8 states. [2020-10-27 18:36:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:12,623 INFO L93 Difference]: Finished difference Result 15752 states and 23306 transitions. [2020-10-27 18:36:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 18:36:12,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 281 [2020-10-27 18:36:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:12,681 INFO L225 Difference]: With dead ends: 15752 [2020-10-27 18:36:12,681 INFO L226 Difference]: Without dead ends: 10246 [2020-10-27 18:36:12,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 18:36:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10246 states. [2020-10-27 18:36:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10246 to 10216. [2020-10-27 18:36:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10216 states. [2020-10-27 18:36:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 14317 transitions. [2020-10-27 18:36:13,014 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 14317 transitions. Word has length 281 [2020-10-27 18:36:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:13,015 INFO L481 AbstractCegarLoop]: Abstraction has 10216 states and 14317 transitions. [2020-10-27 18:36:13,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:36:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 14317 transitions. [2020-10-27 18:36:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 18:36:13,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:13,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:36:13,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:36:13,030 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1896132642, now seen corresponding path program 1 times [2020-10-27 18:36:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:13,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851168198] [2020-10-27 18:36:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:13,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:16,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:16,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 18:36:16,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:36:16,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3067 [2020-10-27 18:36:16,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:36:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:36:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:16,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:16,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:16,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:36:16,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:16,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:16,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:16,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:36:16,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-27 18:36:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:16,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:16,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:36:16,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 18:36:16,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:16,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:16,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:16,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:36:16,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851168198] [2020-10-27 18:36:16,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:16,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943959810] [2020-10-27 18:36:16,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:16,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:16,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:16,916 INFO L87 Difference]: Start difference. First operand 10216 states and 14317 transitions. Second operand 7 states. [2020-10-27 18:36:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:32,759 INFO L93 Difference]: Finished difference Result 26509 states and 44133 transitions. [2020-10-27 18:36:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:36:32,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-27 18:36:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:32,891 INFO L225 Difference]: With dead ends: 26509 [2020-10-27 18:36:32,891 INFO L226 Difference]: Without dead ends: 16606 [2020-10-27 18:36:32,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 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 18:36:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16606 states. [2020-10-27 18:36:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16606 to 14466. [2020-10-27 18:36:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14466 states. [2020-10-27 18:36:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14466 states to 14466 states and 21296 transitions. [2020-10-27 18:36:33,652 INFO L78 Accepts]: Start accepts. Automaton has 14466 states and 21296 transitions. Word has length 295 [2020-10-27 18:36:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:33,653 INFO L481 AbstractCegarLoop]: Abstraction has 14466 states and 21296 transitions. [2020-10-27 18:36:33,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:36:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 14466 states and 21296 transitions. [2020-10-27 18:36:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 18:36:33,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:33,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:33,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:36:33,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1062871464, now seen corresponding path program 1 times [2020-10-27 18:36:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889996557] [2020-10-27 18:36:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:35,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:35,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-27 18:36:35,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:36:35,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-27 18:36:35,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:36:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:36:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-27 18:36:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:35,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:35,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:35,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:35,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:35,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:36:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:36,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:36,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-27 18:36:36,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:36:36,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889996557] [2020-10-27 18:36:36,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:36,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:36,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525186933] [2020-10-27 18:36:36,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:36:36,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:36:36,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:36:36,755 INFO L87 Difference]: Start difference. First operand 14466 states and 21296 transitions. Second operand 8 states. [2020-10-27 18:36:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:36:51,206 INFO L93 Difference]: Finished difference Result 28817 states and 43848 transitions. [2020-10-27 18:36:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:36:51,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 298 [2020-10-27 18:36:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:36:51,285 INFO L225 Difference]: With dead ends: 28817 [2020-10-27 18:36:51,285 INFO L226 Difference]: Without dead ends: 14627 [2020-10-27 18:36:51,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 18:36:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14627 states. [2020-10-27 18:36:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14627 to 14457. [2020-10-27 18:36:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-10-27 18:36:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20342 transitions. [2020-10-27 18:36:51,801 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20342 transitions. Word has length 298 [2020-10-27 18:36:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:36:51,801 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20342 transitions. [2020-10-27 18:36:51,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:36:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20342 transitions. [2020-10-27 18:36:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-27 18:36:51,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:36:51,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:36:51,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:36:51,816 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:36:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:36:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1537929048, now seen corresponding path program 1 times [2020-10-27 18:36:51,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:36:51,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289309788] [2020-10-27 18:36:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:36:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:52,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:54,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:55,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-27 18:36:55,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:36:55,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3429 [2020-10-27 18:36:55,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-10-27 18:36:55,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:36:55,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:55,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:55,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:55,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:55,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:55,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:55,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:55,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 18:36:55,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:55,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:36:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:55,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:55,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:55,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:36:55,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 18:36:55,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:36:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:36:56,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289309788] [2020-10-27 18:36:56,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:56,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:56,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903493080] [2020-10-27 18:36:56,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:56,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:56,115 INFO L87 Difference]: Start difference. First operand 14457 states and 20342 transitions. Second operand 7 states. [2020-10-27 18:37:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:14,559 INFO L93 Difference]: Finished difference Result 37137 states and 55352 transitions. [2020-10-27 18:37:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:37:14,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 352 [2020-10-27 18:37:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:14,662 INFO L225 Difference]: With dead ends: 37137 [2020-10-27 18:37:14,662 INFO L226 Difference]: Without dead ends: 23304 [2020-10-27 18:37:14,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:37:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23304 states. [2020-10-27 18:37:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23304 to 22852. [2020-10-27 18:37:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22852 states. [2020-10-27 18:37:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22852 states to 22852 states and 32871 transitions. [2020-10-27 18:37:15,384 INFO L78 Accepts]: Start accepts. Automaton has 22852 states and 32871 transitions. Word has length 352 [2020-10-27 18:37:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:15,385 INFO L481 AbstractCegarLoop]: Abstraction has 22852 states and 32871 transitions. [2020-10-27 18:37:15,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:37:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 22852 states and 32871 transitions. [2020-10-27 18:37:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-27 18:37:15,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:15,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:37:15,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:37:15,406 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1240244777, now seen corresponding path program 1 times [2020-10-27 18:37:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:15,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260647193] [2020-10-27 18:37:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:15,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:15,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:16,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:18,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:18,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-27 18:37:18,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:37:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2799 [2020-10-27 18:37:18,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 18:37:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:37:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 369 [2020-10-27 18:37:18,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:18,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:18,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:37:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:18,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:18,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:18,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-27 18:37:18,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:18,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:37:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:18,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:18,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:37:18,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 18:37:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:37:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:37:18,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 7 proven. 102 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 18:37:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260647193] [2020-10-27 18:37:19,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:19,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:37:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286841606] [2020-10-27 18:37:19,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:37:19,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:37:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:37:19,149 INFO L87 Difference]: Start difference. First operand 22852 states and 32871 transitions. Second operand 8 states. [2020-10-27 18:37:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:37:39,431 INFO L93 Difference]: Finished difference Result 54100 states and 83858 transitions. [2020-10-27 18:37:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 18:37:39,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 364 [2020-10-27 18:37:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:37:39,622 INFO L225 Difference]: With dead ends: 54100 [2020-10-27 18:37:39,623 INFO L226 Difference]: Without dead ends: 33433 [2020-10-27 18:37:39,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-27 18:37:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33433 states. [2020-10-27 18:37:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33433 to 30970. [2020-10-27 18:37:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30970 states. [2020-10-27 18:37:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30970 states to 30970 states and 44518 transitions. [2020-10-27 18:37:40,808 INFO L78 Accepts]: Start accepts. Automaton has 30970 states and 44518 transitions. Word has length 364 [2020-10-27 18:37:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:37:40,809 INFO L481 AbstractCegarLoop]: Abstraction has 30970 states and 44518 transitions. [2020-10-27 18:37:40,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:37:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 30970 states and 44518 transitions. [2020-10-27 18:37:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-27 18:37:40,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:37:40,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:37:40,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:37:40,827 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:37:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:37:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 869096739, now seen corresponding path program 1 times [2020-10-27 18:37:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:37:40,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025612918] [2020-10-27 18:37:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:37:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:40,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:41,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:44,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:44,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:44,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 384 [2020-10-27 18:37:44,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:37:44,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3576 [2020-10-27 18:37:44,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 210 [2020-10-27 18:37:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 18:37:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:37:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:44,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:37:44,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:44,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:37:44,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:37:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:37:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:37:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 18:37:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:44,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:37:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:37:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:37:45,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:37:45,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:37:45,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:37:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:37:45,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:37:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:37:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:37:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 18:37:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:37:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:37:45,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025612918] [2020-10-27 18:37:45,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:37:45,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:37:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644833593] [2020-10-27 18:37:45,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:37:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:37:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:37:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:37:45,207 INFO L87 Difference]: Start difference. First operand 30970 states and 44518 transitions. Second operand 7 states.