/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/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:30:32,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:30:32,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:30:32,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:30:32,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:30:32,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:30:32,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:30:32,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:30:32,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:30:32,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:30:32,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:30:32,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:30:32,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:30:32,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:30:32,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:30:32,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:30:32,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:30:32,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:30:32,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:30:32,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:30:32,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:30:32,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:30:32,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:30:32,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:30:32,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:30:32,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:30:32,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:30:32,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:30:32,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:30:32,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:30:32,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:30:32,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:30:32,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:30:32,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:30:32,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:30:32,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:30:32,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:30:32,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:30:32,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:30:32,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:30:32,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:30:32,641 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 14:30:32,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:30:32,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:30:32,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:30:32,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:30:32,675 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:30:32,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:30:32,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:30:32,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:30:32,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:30:32,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:30:32,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:30:32,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:30:32,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:30:32,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:30:32,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:30:32,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:30:32,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:30:32,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:30:32,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:30:32,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:30:32,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:30:32,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:32,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:30:32,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:30:32,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:30:32,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:30:32,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:30:32,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:30:32,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:30:32,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:30:33,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:30:33,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:30:33,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:30:33,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:30:33,136 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:30:33,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2020-10-27 14:30:33,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6080e802b/f216cd1cd6444bfb8a1a97c34a921468/FLAG9b43df393 [2020-10-27 14:30:33,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:30:33,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_running-2.i [2020-10-27 14:30:33,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6080e802b/f216cd1cd6444bfb8a1a97c34a921468/FLAG9b43df393 [2020-10-27 14:30:34,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6080e802b/f216cd1cd6444bfb8a1a97c34a921468 [2020-10-27 14:30:34,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:30:34,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:30:34,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:34,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:30:34,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:30:34,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4578a35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34, skipping insertion in model container [2020-10-27 14:30:34,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:30:34,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:30:34,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:34,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:30:34,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:34,420 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:30:34,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34 WrapperNode [2020-10-27 14:30:34,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:34,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:30:34,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:30:34,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:30:34,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (1/1) ... [2020-10-27 14:30:34,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:30:34,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:30:34,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:30:34,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:30:34,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (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 14:30:34,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:30:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:30:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:30:34,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:30:34,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:30:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:30:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:30:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:30:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:30:34,676 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:30:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:30:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:30:34,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:30:34,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:30:34,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:30:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:30:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:30:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:30:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:30:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:30:35,323 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:30:35,323 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:30:35,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:35 BoogieIcfgContainer [2020-10-27 14:30:35,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:30:35,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:30:35,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:30:35,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:30:35,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:30:34" (1/3) ... [2020-10-27 14:30:35,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0400ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:35, skipping insertion in model container [2020-10-27 14:30:35,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:34" (2/3) ... [2020-10-27 14:30:35,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0400ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:35, skipping insertion in model container [2020-10-27 14:30:35,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:35" (3/3) ... [2020-10-27 14:30:35,338 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2020-10-27 14:30:35,351 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:30:35,363 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:30:35,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:30:35,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:30:35,415 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:30:35,415 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:30:35,415 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:30:35,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:30:35,416 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:30:35,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:30:35,416 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:30:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:30:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:30:35,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:35,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:35,442 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1112199025, now seen corresponding path program 1 times [2020-10-27 14:30:35,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:35,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930211763] [2020-10-27 14:30:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:30:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-27 14:30:36,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:30:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:36,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:30:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:36,324 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 14:30:36,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930211763] [2020-10-27 14:30:36,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:36,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:30:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983471516] [2020-10-27 14:30:36,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:30:36,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:30:36,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:36,350 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:30:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:36,492 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-27 14:30:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:30:36,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:30:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:36,502 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:30:36,502 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:30:36,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:30:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:30:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:30:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-27 14:30:36,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-10-27 14:30:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:36,547 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-27 14:30:36,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:30:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-27 14:30:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:30:36,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:36,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:36,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:30:36,549 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:36,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:36,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1368569504, now seen corresponding path program 1 times [2020-10-27 14:30:36,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:36,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389714637] [2020-10-27 14:30:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:30:37,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:37,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 14:30:37,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:30:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:30:37,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:37,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:37,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:37,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:37,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:37,097 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 14:30:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389714637] [2020-10-27 14:30:37,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:37,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087444307] [2020-10-27 14:30:37,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:37,102 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 6 states. [2020-10-27 14:30:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:37,305 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 14:30:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:37,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 14:30:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:37,307 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:30:37,308 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:30:37,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:30:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:30:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:30:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-27 14:30:37,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2020-10-27 14:30:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:37,318 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-27 14:30:37,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-27 14:30:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:37,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:37,320 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] [2020-10-27 14:30:37,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:30:37,321 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1872127637, now seen corresponding path program 1 times [2020-10-27 14:30:37,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:37,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521010728] [2020-10-27 14:30:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:37,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:40,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:40,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:40,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2686 [2020-10-27 14:30:40,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:30:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:30:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:40,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:40,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:40,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:40,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:30:40,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:40,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:40,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:40,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:40,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:40,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521010728] [2020-10-27 14:30:40,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:40,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975511613] [2020-10-27 14:30:40,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:40,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:40,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:40,144 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2020-10-27 14:30:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:40,291 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-10-27 14:30:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:40,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 14:30:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:40,294 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:30:40,294 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:30:40,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:30:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-27 14:30:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:30:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-27 14:30:40,305 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 24 [2020-10-27 14:30:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:40,305 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-27 14:30:40,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-27 14:30:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:40,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:40,307 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] [2020-10-27 14:30:40,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:30:40,307 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1192069267, now seen corresponding path program 1 times [2020-10-27 14:30:40,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358313864] [2020-10-27 14:30:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:41,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-27 14:30:41,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:30:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:30:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:41,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:41,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:41,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:41,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358313864] [2020-10-27 14:30:41,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:41,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:41,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168698758] [2020-10-27 14:30:41,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:41,270 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 6 states. [2020-10-27 14:30:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:41,424 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2020-10-27 14:30:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:41,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 14:30:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:41,426 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:30:41,426 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:30:41,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:30:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-27 14:30:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:30:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-10-27 14:30:41,435 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2020-10-27 14:30:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:41,436 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-10-27 14:30:41,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-10-27 14:30:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:41,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:41,437 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] [2020-10-27 14:30:41,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:30:41,437 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:41,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1585096277, now seen corresponding path program 1 times [2020-10-27 14:30:41,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:41,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85051487] [2020-10-27 14:30:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:30:41,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:30:41,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:41,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:30:41,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:41,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85051487] [2020-10-27 14:30:41,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:41,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:30:41,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446536779] [2020-10-27 14:30:41,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:41,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:41,713 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2020-10-27 14:30:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:41,871 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2020-10-27 14:30:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:41,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:30:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:41,873 INFO L225 Difference]: With dead ends: 123 [2020-10-27 14:30:41,873 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:30:41,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:30:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2020-10-27 14:30:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:30:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2020-10-27 14:30:41,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 24 [2020-10-27 14:30:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:41,884 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2020-10-27 14:30:41,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2020-10-27 14:30:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:30:41,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:41,886 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:30:41,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:30:41,887 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1898177412, now seen corresponding path program 1 times [2020-10-27 14:30:41,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:41,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462414527] [2020-10-27 14:30:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:41,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:46,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:30:46,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:30:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:30:46,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:30:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:30:46,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:47,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:47,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:47,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:47,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:47,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:47,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:47,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:47,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:30:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462414527] [2020-10-27 14:30:47,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:47,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:30:47,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53920280] [2020-10-27 14:30:47,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:47,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:47,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:47,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:47,031 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 6 states. [2020-10-27 14:30:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:47,244 INFO L93 Difference]: Finished difference Result 166 states and 228 transitions. [2020-10-27 14:30:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:47,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 14:30:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:47,247 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:30:47,247 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:30:47,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:30:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2020-10-27 14:30:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:30:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-10-27 14:30:47,259 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 41 [2020-10-27 14:30:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:47,260 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-10-27 14:30:47,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-10-27 14:30:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:30:47,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:47,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:47,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:30:47,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash -319031113, now seen corresponding path program 2 times [2020-10-27 14:30:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610987254] [2020-10-27 14:30:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:30:52,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:52,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:30:52,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:30:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:30:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:30:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:52,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:52,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:52,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:52,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:52,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:30:52,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610987254] [2020-10-27 14:30:52,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:52,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:30:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949304054] [2020-10-27 14:30:52,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:30:52,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:30:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:30:52,535 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 9 states. [2020-10-27 14:30:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:53,088 INFO L93 Difference]: Finished difference Result 195 states and 263 transitions. [2020-10-27 14:30:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:30:53,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 14:30:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:53,091 INFO L225 Difference]: With dead ends: 195 [2020-10-27 14:30:53,091 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:30:53,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:30:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:30:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 115. [2020-10-27 14:30:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 14:30:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2020-10-27 14:30:53,119 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 53 [2020-10-27 14:30:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:53,120 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2020-10-27 14:30:53,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:30:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2020-10-27 14:30:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:30:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:53,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:53,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:30:53,125 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2007974855, now seen corresponding path program 1 times [2020-10-27 14:30:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:53,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848435868] [2020-10-27 14:30:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:58,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:30:58,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:30:58,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:30:58,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:58,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:30:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:30:58,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:30:58,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:58,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:58,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:58,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:58,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:58,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:58,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:30:58,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848435868] [2020-10-27 14:30:58,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:58,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:30:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408529424] [2020-10-27 14:30:58,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:30:58,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:30:58,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:58,334 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand 7 states. [2020-10-27 14:30:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:58,535 INFO L93 Difference]: Finished difference Result 277 states and 366 transitions. [2020-10-27 14:30:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:58,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 14:30:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:58,537 INFO L225 Difference]: With dead ends: 277 [2020-10-27 14:30:58,537 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 14:30:58,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 14:30:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2020-10-27 14:30:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 14:30:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2020-10-27 14:30:58,570 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 53 [2020-10-27 14:30:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:58,571 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2020-10-27 14:30:58,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:30:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2020-10-27 14:30:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:30:58,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:58,576 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:58,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:30:58,577 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:58,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:58,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1242266666, now seen corresponding path program 2 times [2020-10-27 14:30:58,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:58,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708370405] [2020-10-27 14:30:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:58,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:31:03,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:03,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:31:03,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:31:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:31:03,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:03,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:31:03,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708370405] [2020-10-27 14:31:03,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:03,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:03,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673324899] [2020-10-27 14:31:03,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:03,929 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand 13 states. [2020-10-27 14:31:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:05,076 INFO L93 Difference]: Finished difference Result 305 states and 401 transitions. [2020-10-27 14:31:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:31:05,077 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 14:31:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:05,080 INFO L225 Difference]: With dead ends: 305 [2020-10-27 14:31:05,080 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 14:31:05,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:31:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 14:31:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 214. [2020-10-27 14:31:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 14:31:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2020-10-27 14:31:05,111 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 65 [2020-10-27 14:31:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:05,112 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2020-10-27 14:31:05,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2020-10-27 14:31:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:31:05,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:05,114 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:05,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:31:05,115 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -984101228, now seen corresponding path program 3 times [2020-10-27 14:31:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:05,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541312607] [2020-10-27 14:31:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:08,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:10,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:31:10,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:31:10,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:10,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:10,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:10,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:31:10,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541312607] [2020-10-27 14:31:10,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:10,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:31:10,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198445708] [2020-10-27 14:31:10,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:31:10,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:10,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:31:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:31:10,302 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand 8 states. [2020-10-27 14:31:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:10,508 INFO L93 Difference]: Finished difference Result 477 states and 636 transitions. [2020-10-27 14:31:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:31:10,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 14:31:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:10,511 INFO L225 Difference]: With dead ends: 477 [2020-10-27 14:31:10,511 INFO L226 Difference]: Without dead ends: 278 [2020-10-27 14:31:10,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:31:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-27 14:31:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2020-10-27 14:31:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 14:31:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 323 transitions. [2020-10-27 14:31:10,525 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 323 transitions. Word has length 65 [2020-10-27 14:31:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:10,526 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 323 transitions. [2020-10-27 14:31:10,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:31:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 323 transitions. [2020-10-27 14:31:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:31:10,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:10,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:10,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:31:10,528 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1565395351, now seen corresponding path program 4 times [2020-10-27 14:31:10,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:10,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266060932] [2020-10-27 14:31:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:14,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:14,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:15,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:31:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:31:15,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:31:15,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:15,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:15,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:15,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:15,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:15,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:15,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:15,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:15,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:15,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:15,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:31:15,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266060932] [2020-10-27 14:31:15,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:15,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:31:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146003283] [2020-10-27 14:31:15,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:31:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:31:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:15,712 INFO L87 Difference]: Start difference. First operand 246 states and 323 transitions. Second operand 9 states. [2020-10-27 14:31:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:15,961 INFO L93 Difference]: Finished difference Result 540 states and 720 transitions. [2020-10-27 14:31:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:31:15,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-27 14:31:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:15,964 INFO L225 Difference]: With dead ends: 540 [2020-10-27 14:31:15,964 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 14:31:15,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 14:31:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 279. [2020-10-27 14:31:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 14:31:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 367 transitions. [2020-10-27 14:31:15,980 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 367 transitions. Word has length 77 [2020-10-27 14:31:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:15,981 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 367 transitions. [2020-10-27 14:31:15,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:31:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 367 transitions. [2020-10-27 14:31:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:31:15,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:15,986 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:15,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:31:15,986 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1592257360, now seen corresponding path program 5 times [2020-10-27 14:31:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:15,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328625713] [2020-10-27 14:31:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:21,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:31:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:31:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:31:21,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:31:21,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:21,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:21,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:21,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:21,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:21,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:31:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-27 14:31:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328625713] [2020-10-27 14:31:21,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:21,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:31:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159202251] [2020-10-27 14:31:21,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:31:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:31:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:31:21,175 INFO L87 Difference]: Start difference. First operand 279 states and 367 transitions. Second operand 7 states. [2020-10-27 14:31:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:21,494 INFO L93 Difference]: Finished difference Result 487 states and 640 transitions. [2020-10-27 14:31:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:31:21,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-27 14:31:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:21,502 INFO L225 Difference]: With dead ends: 487 [2020-10-27 14:31:21,502 INFO L226 Difference]: Without dead ends: 420 [2020-10-27 14:31:21,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-27 14:31:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2020-10-27 14:31:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-27 14:31:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 395 transitions. [2020-10-27 14:31:21,524 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 395 transitions. Word has length 89 [2020-10-27 14:31:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:21,525 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 395 transitions. [2020-10-27 14:31:21,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:31:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 395 transitions. [2020-10-27 14:31:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:31:21,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:21,538 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:21,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:31:21,538 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1945345742, now seen corresponding path program 6 times [2020-10-27 14:31:21,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:21,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920430971] [2020-10-27 14:31:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:26,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:26,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:31:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:31:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:31:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:31:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:31:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:26,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:26,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:26,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-27 14:31:26,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920430971] [2020-10-27 14:31:26,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:26,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:31:26,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164810928] [2020-10-27 14:31:26,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:31:26,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:31:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:31:26,700 INFO L87 Difference]: Start difference. First operand 300 states and 395 transitions. Second operand 10 states. [2020-10-27 14:31:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:27,016 INFO L93 Difference]: Finished difference Result 651 states and 870 transitions. [2020-10-27 14:31:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:31:27,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-27 14:31:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:27,021 INFO L225 Difference]: With dead ends: 651 [2020-10-27 14:31:27,021 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 14:31:27,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:31:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 14:31:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 336. [2020-10-27 14:31:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 14:31:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 443 transitions. [2020-10-27 14:31:27,042 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 443 transitions. Word has length 89 [2020-10-27 14:31:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:27,042 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 443 transitions. [2020-10-27 14:31:27,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:31:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 443 transitions. [2020-10-27 14:31:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:27,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:27,044 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:27,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:31:27,045 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 844473137, now seen corresponding path program 7 times [2020-10-27 14:31:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:27,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227745763] [2020-10-27 14:31:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:27,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:32,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:32,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:32,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:31:32,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:32,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:32,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:32,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 64 proven. 153 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-27 14:31:32,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227745763] [2020-10-27 14:31:32,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:31:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165796108] [2020-10-27 14:31:32,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:31:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:31:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:31:32,510 INFO L87 Difference]: Start difference. First operand 336 states and 443 transitions. Second operand 17 states. [2020-10-27 14:31:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:34,618 INFO L93 Difference]: Finished difference Result 521 states and 687 transitions. [2020-10-27 14:31:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:31:34,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-27 14:31:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:34,622 INFO L225 Difference]: With dead ends: 521 [2020-10-27 14:31:34,624 INFO L226 Difference]: Without dead ends: 498 [2020-10-27 14:31:34,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:31:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-27 14:31:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 451. [2020-10-27 14:31:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-27 14:31:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 598 transitions. [2020-10-27 14:31:34,645 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 598 transitions. Word has length 101 [2020-10-27 14:31:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:34,647 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 598 transitions. [2020-10-27 14:31:34,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:31:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 598 transitions. [2020-10-27 14:31:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:31:34,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:34,649 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:34,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:31:34,649 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -844470605, now seen corresponding path program 8 times [2020-10-27 14:31:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:34,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654126894] [2020-10-27 14:31:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:34,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:31:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:31:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:31:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:39,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:39,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:39,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:39,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:39,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-27 14:31:39,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654126894] [2020-10-27 14:31:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:31:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595424454] [2020-10-27 14:31:39,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:31:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:31:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:39,826 INFO L87 Difference]: Start difference. First operand 451 states and 598 transitions. Second operand 11 states. [2020-10-27 14:31:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:40,137 INFO L93 Difference]: Finished difference Result 956 states and 1282 transitions. [2020-10-27 14:31:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:31:40,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-27 14:31:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:40,141 INFO L225 Difference]: With dead ends: 956 [2020-10-27 14:31:40,142 INFO L226 Difference]: Without dead ends: 526 [2020-10-27 14:31:40,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-27 14:31:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 490. [2020-10-27 14:31:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-27 14:31:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 650 transitions. [2020-10-27 14:31:40,164 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 650 transitions. Word has length 101 [2020-10-27 14:31:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:40,165 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 650 transitions. [2020-10-27 14:31:40,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:31:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 650 transitions. [2020-10-27 14:31:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:31:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:40,167 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:40,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:31:40,168 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1345253388, now seen corresponding path program 9 times [2020-10-27 14:31:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564451018] [2020-10-27 14:31:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:41,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:31:45,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:45,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 96 proven. 65 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-27 14:31:45,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564451018] [2020-10-27 14:31:45,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:45,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:31:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346509091] [2020-10-27 14:31:45,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:31:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:31:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:45,442 INFO L87 Difference]: Start difference. First operand 490 states and 650 transitions. Second operand 11 states. [2020-10-27 14:31:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:46,282 INFO L93 Difference]: Finished difference Result 745 states and 986 transitions. [2020-10-27 14:31:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:31:46,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2020-10-27 14:31:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:46,290 INFO L225 Difference]: With dead ends: 745 [2020-10-27 14:31:46,291 INFO L226 Difference]: Without dead ends: 678 [2020-10-27 14:31:46,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:31:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-27 14:31:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 551. [2020-10-27 14:31:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 14:31:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 731 transitions. [2020-10-27 14:31:46,316 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 731 transitions. Word has length 113 [2020-10-27 14:31:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:46,316 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 731 transitions. [2020-10-27 14:31:46,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:31:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 731 transitions. [2020-10-27 14:31:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:31:46,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:46,319 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:46,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:31:46,319 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash 992165006, now seen corresponding path program 10 times [2020-10-27 14:31:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:46,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261251143] [2020-10-27 14:31:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:31:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:31:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:31:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:51,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:51,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-27 14:31:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261251143] [2020-10-27 14:31:51,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:51,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:31:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870618220] [2020-10-27 14:31:51,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:31:51,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:31:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:51,515 INFO L87 Difference]: Start difference. First operand 551 states and 731 transitions. Second operand 12 states. [2020-10-27 14:31:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:51,871 INFO L93 Difference]: Finished difference Result 1159 states and 1554 transitions. [2020-10-27 14:31:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:31:51,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-27 14:31:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:51,876 INFO L225 Difference]: With dead ends: 1159 [2020-10-27 14:31:51,877 INFO L226 Difference]: Without dead ends: 631 [2020-10-27 14:31:51,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-27 14:31:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 593. [2020-10-27 14:31:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2020-10-27 14:31:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 787 transitions. [2020-10-27 14:31:51,910 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 787 transitions. Word has length 113 [2020-10-27 14:31:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:51,910 INFO L481 AbstractCegarLoop]: Abstraction has 593 states and 787 transitions. [2020-10-27 14:31:51,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:31:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 787 transitions. [2020-10-27 14:31:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:31:51,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:51,915 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:31:51,915 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1682976333, now seen corresponding path program 11 times [2020-10-27 14:31:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:51,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560610901] [2020-10-27 14:31:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:52,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:56,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:31:56,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:31:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:31:56,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:31:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:31:56,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:57,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-27 14:31:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560610901] [2020-10-27 14:31:57,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:57,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045364903] [2020-10-27 14:31:57,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:57,140 INFO L87 Difference]: Start difference. First operand 593 states and 787 transitions. Second operand 13 states. [2020-10-27 14:31:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:57,589 INFO L93 Difference]: Finished difference Result 1241 states and 1664 transitions. [2020-10-27 14:31:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:31:57,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-27 14:31:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:57,593 INFO L225 Difference]: With dead ends: 1241 [2020-10-27 14:31:57,593 INFO L226 Difference]: Without dead ends: 673 [2020-10-27 14:31:57,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-10-27 14:31:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 635. [2020-10-27 14:31:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-27 14:31:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 843 transitions. [2020-10-27 14:31:57,647 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 843 transitions. Word has length 125 [2020-10-27 14:31:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:57,647 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 843 transitions. [2020-10-27 14:31:57,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 843 transitions. [2020-10-27 14:31:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:31:57,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:57,654 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:57,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:31:57,654 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:57,655 INFO L82 PathProgramCache]: Analyzing trace with hash -465493206, now seen corresponding path program 12 times [2020-10-27 14:31:57,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:57,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365374833] [2020-10-27 14:31:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 14:32:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:03,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 140 proven. 306 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-27 14:32:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365374833] [2020-10-27 14:32:03,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:03,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:32:03,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66417793] [2020-10-27 14:32:03,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:32:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:32:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:32:03,256 INFO L87 Difference]: Start difference. First operand 635 states and 843 transitions. Second operand 21 states. [2020-10-27 14:32:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:06,219 INFO L93 Difference]: Finished difference Result 893 states and 1189 transitions. [2020-10-27 14:32:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:32:06,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 137 [2020-10-27 14:32:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:06,224 INFO L225 Difference]: With dead ends: 893 [2020-10-27 14:32:06,225 INFO L226 Difference]: Without dead ends: 859 [2020-10-27 14:32:06,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:32:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-27 14:32:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 797. [2020-10-27 14:32:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 797 states. [2020-10-27 14:32:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1062 transitions. [2020-10-27 14:32:06,269 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1062 transitions. Word has length 137 [2020-10-27 14:32:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:06,269 INFO L481 AbstractCegarLoop]: Abstraction has 797 states and 1062 transitions. [2020-10-27 14:32:06,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:32:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1062 transitions. [2020-10-27 14:32:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:32:06,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:06,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:06,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:32:06,273 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash -403453592, now seen corresponding path program 13 times [2020-10-27 14:32:06,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:06,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567375755] [2020-10-27 14:32:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:06,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:11,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:11,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:11,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:32:11,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:32:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:32:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:32:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:11,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:11,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:11,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:11,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:11,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:11,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:11,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:11,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:11,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:11,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 166 proven. 253 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-27 14:32:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567375755] [2020-10-27 14:32:11,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:11,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:32:11,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393401065] [2020-10-27 14:32:11,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:32:11,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:11,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:32:11,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:32:11,745 INFO L87 Difference]: Start difference. First operand 797 states and 1062 transitions. Second operand 19 states. [2020-10-27 14:32:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:14,168 INFO L93 Difference]: Finished difference Result 1068 states and 1423 transitions. [2020-10-27 14:32:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:32:14,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2020-10-27 14:32:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:14,174 INFO L225 Difference]: With dead ends: 1068 [2020-10-27 14:32:14,174 INFO L226 Difference]: Without dead ends: 1023 [2020-10-27 14:32:14,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:32:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-27 14:32:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 940. [2020-10-27 14:32:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-27 14:32:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1255 transitions. [2020-10-27 14:32:14,215 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1255 transitions. Word has length 137 [2020-10-27 14:32:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:14,216 INFO L481 AbstractCegarLoop]: Abstraction has 940 states and 1255 transitions. [2020-10-27 14:32:14,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:32:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1255 transitions. [2020-10-27 14:32:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:32:14,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:14,220 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:14,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:32:14,220 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -475840150, now seen corresponding path program 14 times [2020-10-27 14:32:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:14,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284462285] [2020-10-27 14:32:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:14,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:14,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:19,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:32:19,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:19,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 14:32:19,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:32:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:32:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:32:19,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-27 14:32:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284462285] [2020-10-27 14:32:19,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:19,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:32:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385559579] [2020-10-27 14:32:19,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:32:19,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:32:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:32:19,449 INFO L87 Difference]: Start difference. First operand 940 states and 1255 transitions. Second operand 14 states. [2020-10-27 14:32:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:19,794 INFO L93 Difference]: Finished difference Result 1943 states and 2614 transitions. [2020-10-27 14:32:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:32:19,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-27 14:32:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:19,799 INFO L225 Difference]: With dead ends: 1943 [2020-10-27 14:32:19,800 INFO L226 Difference]: Without dead ends: 1030 [2020-10-27 14:32:19,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:32:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-10-27 14:32:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 988. [2020-10-27 14:32:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-10-27 14:32:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1319 transitions. [2020-10-27 14:32:19,842 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1319 transitions. Word has length 137 [2020-10-27 14:32:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:19,843 INFO L481 AbstractCegarLoop]: Abstraction has 988 states and 1319 transitions. [2020-10-27 14:32:19,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:32:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1319 transitions. [2020-10-27 14:32:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:32:19,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:19,847 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:19,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:32:19,847 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash -345453591, now seen corresponding path program 15 times [2020-10-27 14:32:19,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:19,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117116262] [2020-10-27 14:32:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:19,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:21,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:24,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 14:32:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:25,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:25,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 207 proven. 173 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2020-10-27 14:32:25,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117116262] [2020-10-27 14:32:25,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:25,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:32:25,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363736940] [2020-10-27 14:32:25,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:32:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:32:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:32:25,275 INFO L87 Difference]: Start difference. First operand 988 states and 1319 transitions. Second operand 15 states. [2020-10-27 14:32:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:26,709 INFO L93 Difference]: Finished difference Result 1323 states and 1761 transitions. [2020-10-27 14:32:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:32:26,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-27 14:32:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:26,720 INFO L225 Difference]: With dead ends: 1323 [2020-10-27 14:32:26,720 INFO L226 Difference]: Without dead ends: 1245 [2020-10-27 14:32:26,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:32:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2020-10-27 14:32:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1096. [2020-10-27 14:32:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1096 states. [2020-10-27 14:32:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1464 transitions. [2020-10-27 14:32:26,768 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1464 transitions. Word has length 149 [2020-10-27 14:32:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:26,768 INFO L481 AbstractCegarLoop]: Abstraction has 1096 states and 1464 transitions. [2020-10-27 14:32:26,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:32:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1464 transitions. [2020-10-27 14:32:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:32:26,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:26,773 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:26,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:32:26,773 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 530565415, now seen corresponding path program 16 times [2020-10-27 14:32:26,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:26,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106763056] [2020-10-27 14:32:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:31,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:31,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:32:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:32,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:32,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:32,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:32,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:32,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-27 14:32:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106763056] [2020-10-27 14:32:32,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:32,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:32:32,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207729090] [2020-10-27 14:32:32,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:32:32,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:32:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:32:32,040 INFO L87 Difference]: Start difference. First operand 1096 states and 1464 transitions. Second operand 15 states. [2020-10-27 14:32:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:32,451 INFO L93 Difference]: Finished difference Result 2258 states and 3038 transitions. [2020-10-27 14:32:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:32:32,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-27 14:32:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:32,457 INFO L225 Difference]: With dead ends: 2258 [2020-10-27 14:32:32,457 INFO L226 Difference]: Without dead ends: 1191 [2020-10-27 14:32:32,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:32:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2020-10-27 14:32:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2020-10-27 14:32:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2020-10-27 14:32:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1532 transitions. [2020-10-27 14:32:32,502 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1532 transitions. Word has length 149 [2020-10-27 14:32:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:32,502 INFO L481 AbstractCegarLoop]: Abstraction has 1147 states and 1532 transitions. [2020-10-27 14:32:32,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:32:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1532 transitions. [2020-10-27 14:32:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 14:32:32,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:32,506 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:32,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:32:32,507 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 693585672, now seen corresponding path program 17 times [2020-10-27 14:32:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:32,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673737083] [2020-10-27 14:32:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:32,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:32:37,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:37,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:37,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:37,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:37,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:37,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-27 14:32:37,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673737083] [2020-10-27 14:32:37,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:32:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291001218] [2020-10-27 14:32:37,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:32:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:32:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:37,812 INFO L87 Difference]: Start difference. First operand 1147 states and 1532 transitions. Second operand 16 states. [2020-10-27 14:32:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:38,242 INFO L93 Difference]: Finished difference Result 2358 states and 3172 transitions. [2020-10-27 14:32:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:32:38,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-27 14:32:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:38,249 INFO L225 Difference]: With dead ends: 2358 [2020-10-27 14:32:38,249 INFO L226 Difference]: Without dead ends: 1242 [2020-10-27 14:32:38,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-27 14:32:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1198. [2020-10-27 14:32:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2020-10-27 14:32:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1600 transitions. [2020-10-27 14:32:38,292 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1600 transitions. Word has length 161 [2020-10-27 14:32:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:38,292 INFO L481 AbstractCegarLoop]: Abstraction has 1198 states and 1600 transitions. [2020-10-27 14:32:38,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:32:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1600 transitions. [2020-10-27 14:32:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:32:38,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:38,297 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:38,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:32:38,299 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1549555331, now seen corresponding path program 18 times [2020-10-27 14:32:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:38,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997768250] [2020-10-27 14:32:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:43,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:43,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:32:43,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 14:32:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:43,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:43,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:43,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 244 proven. 511 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-27 14:32:44,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997768250] [2020-10-27 14:32:44,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:44,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:32:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899971579] [2020-10-27 14:32:44,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:32:44,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:32:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:32:44,048 INFO L87 Difference]: Start difference. First operand 1198 states and 1600 transitions. Second operand 25 states. [2020-10-27 14:32:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:48,371 INFO L93 Difference]: Finished difference Result 1536 states and 2055 transitions. [2020-10-27 14:32:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 14:32:48,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-10-27 14:32:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:48,379 INFO L225 Difference]: With dead ends: 1536 [2020-10-27 14:32:48,379 INFO L226 Difference]: Without dead ends: 1491 [2020-10-27 14:32:48,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:32:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2020-10-27 14:32:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1407. [2020-10-27 14:32:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1407 states. [2020-10-27 14:32:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1883 transitions. [2020-10-27 14:32:48,429 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1883 transitions. Word has length 173 [2020-10-27 14:32:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:48,429 INFO L481 AbstractCegarLoop]: Abstraction has 1407 states and 1883 transitions. [2020-10-27 14:32:48,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:32:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1883 transitions. [2020-10-27 14:32:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:32:48,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:48,435 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:48,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:32:48,435 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1477168773, now seen corresponding path program 19 times [2020-10-27 14:32:48,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:48,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851072423] [2020-10-27 14:32:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:32:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:32:53,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:32:53,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:53,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:53,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:54,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:54,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:54,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:54,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:54,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 277 proven. 441 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-10-27 14:32:54,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851072423] [2020-10-27 14:32:54,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:54,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:32:54,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734535446] [2020-10-27 14:32:54,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:32:54,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:32:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:32:54,087 INFO L87 Difference]: Start difference. First operand 1407 states and 1883 transitions. Second operand 23 states. [2020-10-27 14:32:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:57,741 INFO L93 Difference]: Finished difference Result 1758 states and 2353 transitions. [2020-10-27 14:32:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:32:57,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2020-10-27 14:32:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:57,750 INFO L225 Difference]: With dead ends: 1758 [2020-10-27 14:32:57,751 INFO L226 Difference]: Without dead ends: 1702 [2020-10-27 14:32:57,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:32:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2020-10-27 14:32:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1597. [2020-10-27 14:32:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1597 states. [2020-10-27 14:32:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2140 transitions. [2020-10-27 14:32:57,804 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2140 transitions. Word has length 173 [2020-10-27 14:32:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:57,805 INFO L481 AbstractCegarLoop]: Abstraction has 1597 states and 2140 transitions. [2020-10-27 14:32:57,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:32:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2140 transitions. [2020-10-27 14:32:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:32:57,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:57,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:57,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:32:57,810 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash 105361475, now seen corresponding path program 20 times [2020-10-27 14:32:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:57,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946573374] [2020-10-27 14:32:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:02,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:33:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 14:33:02,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:33:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:33:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 14:33:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:03,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:03,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:03,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:33:03,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 585 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-27 14:33:03,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946573374] [2020-10-27 14:33:03,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:03,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:33:03,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051184930] [2020-10-27 14:33:03,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:33:03,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:33:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:33:03,842 INFO L87 Difference]: Start difference. First operand 1597 states and 2140 transitions. Second operand 27 states. [2020-10-27 14:33:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:08,907 INFO L93 Difference]: Finished difference Result 1919 states and 2574 transitions. [2020-10-27 14:33:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 14:33:08,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 173 [2020-10-27 14:33:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:08,919 INFO L225 Difference]: With dead ends: 1919 [2020-10-27 14:33:08,919 INFO L226 Difference]: Without dead ends: 1885 [2020-10-27 14:33:08,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=299, Invalid=4813, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:33:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2020-10-27 14:33:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1825. [2020-10-27 14:33:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1825 states. [2020-10-27 14:33:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2449 transitions. [2020-10-27 14:33:08,981 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2449 transitions. Word has length 173 [2020-10-27 14:33:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:08,982 INFO L481 AbstractCegarLoop]: Abstraction has 1825 states and 2449 transitions. [2020-10-27 14:33:08,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:33:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2449 transitions. [2020-10-27 14:33:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:33:08,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:08,987 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:08,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:33:08,987 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 167401089, now seen corresponding path program 21 times [2020-10-27 14:33:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:08,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147997526] [2020-10-27 14:33:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:11,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:33:14,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 14:33:14,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:33:14,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:33:14,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:33:14,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:14,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:14,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:14,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-27 14:33:14,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147997526] [2020-10-27 14:33:14,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:14,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:33:14,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830730994] [2020-10-27 14:33:14,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:33:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:33:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:33:14,318 INFO L87 Difference]: Start difference. First operand 1825 states and 2449 transitions. Second operand 17 states. [2020-10-27 14:33:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:14,812 INFO L93 Difference]: Finished difference Result 3727 states and 5028 transitions. [2020-10-27 14:33:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:33:14,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2020-10-27 14:33:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:14,821 INFO L225 Difference]: With dead ends: 3727 [2020-10-27 14:33:14,822 INFO L226 Difference]: Without dead ends: 1935 [2020-10-27 14:33:14,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:33:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-10-27 14:33:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1885. [2020-10-27 14:33:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 14:33:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2529 transitions. [2020-10-27 14:33:14,887 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2529 transitions. Word has length 173 [2020-10-27 14:33:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:14,887 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2529 transitions. [2020-10-27 14:33:14,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:33:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2529 transitions. [2020-10-27 14:33:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 14:33:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:14,892 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:14,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:33:14,892 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -986409882, now seen corresponding path program 22 times [2020-10-27 14:33:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:14,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458121873] [2020-10-27 14:33:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:33:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:33:19,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 14:33:19,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:20,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:20,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:20,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 148 proven. 783 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-27 14:33:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458121873] [2020-10-27 14:33:20,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:20,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:33:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604418787] [2020-10-27 14:33:20,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:33:20,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:33:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:33:20,942 INFO L87 Difference]: Start difference. First operand 1885 states and 2529 transitions. Second operand 31 states. [2020-10-27 14:33:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:27,666 INFO L93 Difference]: Finished difference Result 2223 states and 2982 transitions. [2020-10-27 14:33:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-27 14:33:27,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-27 14:33:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:27,676 INFO L225 Difference]: With dead ends: 2223 [2020-10-27 14:33:27,677 INFO L226 Difference]: Without dead ends: 2200 [2020-10-27 14:33:27,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=351, Invalid=6621, Unknown=0, NotChecked=0, Total=6972 [2020-10-27 14:33:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2020-10-27 14:33:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2154. [2020-10-27 14:33:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-10-27 14:33:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2894 transitions. [2020-10-27 14:33:27,749 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2894 transitions. Word has length 185 [2020-10-27 14:33:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:27,750 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 2894 transitions. [2020-10-27 14:33:27,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:33:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2894 transitions. [2020-10-27 14:33:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 14:33:27,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:27,756 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:27,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:33:27,756 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1619613672, now seen corresponding path program 23 times [2020-10-27 14:33:27,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:27,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239181164] [2020-10-27 14:33:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:29,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:32,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 14:33:32,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 14:33:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:33:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:33:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:33:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:33,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:33,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:33,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:33,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-27 14:33:33,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239181164] [2020-10-27 14:33:33,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:33,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:33:33,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583636272] [2020-10-27 14:33:33,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:33:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:33:33,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:33:33,154 INFO L87 Difference]: Start difference. First operand 2154 states and 2894 transitions. Second operand 18 states. [2020-10-27 14:33:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:33,700 INFO L93 Difference]: Finished difference Result 4388 states and 5924 transitions. [2020-10-27 14:33:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:33:33,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 185 [2020-10-27 14:33:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:33,710 INFO L225 Difference]: With dead ends: 4388 [2020-10-27 14:33:33,711 INFO L226 Difference]: Without dead ends: 2269 [2020-10-27 14:33:33,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:33:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2020-10-27 14:33:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2217. [2020-10-27 14:33:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2020-10-27 14:33:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2978 transitions. [2020-10-27 14:33:33,790 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2978 transitions. Word has length 185 [2020-10-27 14:33:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:33,790 INFO L481 AbstractCegarLoop]: Abstraction has 2217 states and 2978 transitions. [2020-10-27 14:33:33,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:33:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2978 transitions. [2020-10-27 14:33:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:33:33,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:33,797 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:33,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:33:33,798 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1375859611, now seen corresponding path program 24 times [2020-10-27 14:33:33,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:33,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604389649] [2020-10-27 14:33:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:33,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:38,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:38,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 14:33:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:33:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 14:33:38,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:33:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:33:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 14:33:38,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:39,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 296 proven. 733 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-27 14:33:39,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604389649] [2020-10-27 14:33:39,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:39,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:33:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278717717] [2020-10-27 14:33:39,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:33:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:33:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:33:39,786 INFO L87 Difference]: Start difference. First operand 2217 states and 2978 transitions. Second operand 29 states. [2020-10-27 14:33:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:45,781 INFO L93 Difference]: Finished difference Result 2597 states and 3488 transitions. [2020-10-27 14:33:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 14:33:45,782 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 197 [2020-10-27 14:33:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:45,793 INFO L225 Difference]: With dead ends: 2597 [2020-10-27 14:33:45,794 INFO L226 Difference]: Without dead ends: 2552 [2020-10-27 14:33:45,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=325, Invalid=5681, Unknown=0, NotChecked=0, Total=6006 [2020-10-27 14:33:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-10-27 14:33:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2470. [2020-10-27 14:33:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2470 states. [2020-10-27 14:33:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3321 transitions. [2020-10-27 14:33:45,876 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3321 transitions. Word has length 197 [2020-10-27 14:33:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:45,877 INFO L481 AbstractCegarLoop]: Abstraction has 2470 states and 3321 transitions. [2020-10-27 14:33:45,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:33:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3321 transitions. [2020-10-27 14:33:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:33:45,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:45,884 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:45,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:33:45,884 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1303473053, now seen corresponding path program 25 times [2020-10-27 14:33:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:45,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260133189] [2020-10-27 14:33:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:47,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:33:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:33:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:33:50,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:51,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:51,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:51,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:51,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:51,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-27 14:33:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260133189] [2020-10-27 14:33:51,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:51,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:33:51,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698576427] [2020-10-27 14:33:51,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:33:51,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:33:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:33:51,261 INFO L87 Difference]: Start difference. First operand 2470 states and 3321 transitions. Second operand 19 states. [2020-10-27 14:33:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:51,849 INFO L93 Difference]: Finished difference Result 5023 states and 6784 transitions. [2020-10-27 14:33:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:33:51,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 197 [2020-10-27 14:33:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:51,861 INFO L225 Difference]: With dead ends: 5023 [2020-10-27 14:33:51,861 INFO L226 Difference]: Without dead ends: 2590 [2020-10-27 14:33:51,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:33:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2020-10-27 14:33:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2536. [2020-10-27 14:33:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2536 states. [2020-10-27 14:33:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3409 transitions. [2020-10-27 14:33:51,946 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3409 transitions. Word has length 197 [2020-10-27 14:33:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:51,946 INFO L481 AbstractCegarLoop]: Abstraction has 2536 states and 3409 transitions. [2020-10-27 14:33:51,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:33:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3409 transitions. [2020-10-27 14:33:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 14:33:51,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:51,953 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:51,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:33:51,954 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:51,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1189255230, now seen corresponding path program 26 times [2020-10-27 14:33:51,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:51,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520092820] [2020-10-27 14:33:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:57,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:57,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:33:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:57,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:57,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:57,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2020-10-27 14:33:57,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520092820] [2020-10-27 14:33:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:57,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:33:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619906638] [2020-10-27 14:33:57,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:33:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:33:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:33:57,376 INFO L87 Difference]: Start difference. First operand 2536 states and 3409 transitions. Second operand 20 states. [2020-10-27 14:33:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:57,935 INFO L93 Difference]: Finished difference Result 5153 states and 6958 transitions. [2020-10-27 14:33:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:33:57,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 209 [2020-10-27 14:33:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:57,947 INFO L225 Difference]: With dead ends: 5153 [2020-10-27 14:33:57,947 INFO L226 Difference]: Without dead ends: 2656 [2020-10-27 14:33:57,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:33:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2020-10-27 14:33:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2602. [2020-10-27 14:33:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2602 states. [2020-10-27 14:33:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3497 transitions. [2020-10-27 14:33:58,049 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3497 transitions. Word has length 209 [2020-10-27 14:33:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:58,049 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 3497 transitions. [2020-10-27 14:33:58,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:33:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3497 transitions. [2020-10-27 14:33:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 14:33:58,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:58,057 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:58,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:33:58,057 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1752133511, now seen corresponding path program 27 times [2020-10-27 14:33:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:58,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510045927] [2020-10-27 14:33:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:58,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:03,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:03,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-27 14:34:03,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:34:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:03,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:03,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:03,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-10-27 14:34:03,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510045927] [2020-10-27 14:34:03,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:03,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:34:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412659962] [2020-10-27 14:34:03,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:34:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:34:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:34:03,557 INFO L87 Difference]: Start difference. First operand 2602 states and 3497 transitions. Second operand 21 states. [2020-10-27 14:34:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:04,186 INFO L93 Difference]: Finished difference Result 5283 states and 7132 transitions. [2020-10-27 14:34:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:34:04,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 221 [2020-10-27 14:34:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:04,193 INFO L225 Difference]: With dead ends: 5283 [2020-10-27 14:34:04,194 INFO L226 Difference]: Without dead ends: 2722 [2020-10-27 14:34:04,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:34:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2020-10-27 14:34:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2668. [2020-10-27 14:34:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2668 states. [2020-10-27 14:34:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3585 transitions. [2020-10-27 14:34:04,280 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3585 transitions. Word has length 221 [2020-10-27 14:34:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:04,281 INFO L481 AbstractCegarLoop]: Abstraction has 2668 states and 3585 transitions. [2020-10-27 14:34:04,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:34:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3585 transitions. [2020-10-27 14:34:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 14:34:04,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:04,288 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:04,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:34:04,288 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:04,289 INFO L82 PathProgramCache]: Analyzing trace with hash -830152866, now seen corresponding path program 28 times [2020-10-27 14:34:04,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:04,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014046852] [2020-10-27 14:34:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:04,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:04,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking...