/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/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:40:50,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:40:50,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:40:50,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:40:50,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:40:50,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:40:50,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:40:50,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:40:50,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:40:50,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:40:50,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:40:50,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:40:50,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:40:50,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:40:50,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:40:50,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:40:50,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:40:50,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:40:50,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:40:50,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:40:50,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:40:50,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:40:50,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:40:50,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:40:50,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:40:50,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:40:50,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:40:50,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:40:50,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:40:50,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:40:50,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:40:50,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:40:50,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:40:50,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:40:50,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:40:50,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:40:50,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:40:50,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:40:50,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:40:50,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:40:50,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:40:50,750 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 19:40:50,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:40:50,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:40:50,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:40:50,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:40:50,780 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:40:50,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:40:50,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:40:50,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:40:50,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:40:50,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:40:50,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:40:50,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:40:50,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:40:50,782 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:40:50,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:40:50,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:40:50,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:40:50,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:40:50,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:40:50,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:40:50,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:40:50,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:40:50,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:40:50,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:40:50,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:40:50,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:40:50,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:40:50,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:40:50,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:40:50,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:40:51,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:40:51,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:40:51,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:40:51,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:40:51,250 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:40:51,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-10-27 19:40:51,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065a06f60/63664fd9d3a84718a3dc7e31ab871f3d/FLAG45c898f8e [2020-10-27 19:40:52,054 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:40:52,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-10-27 19:40:52,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065a06f60/63664fd9d3a84718a3dc7e31ab871f3d/FLAG45c898f8e [2020-10-27 19:40:52,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065a06f60/63664fd9d3a84718a3dc7e31ab871f3d [2020-10-27 19:40:52,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:40:52,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:40:52,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:52,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:40:52,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:40:52,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88d1a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52, skipping insertion in model container [2020-10-27 19:40:52,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:40:52,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:40:52,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:52,633 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:40:52,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:52,682 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:40:52,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52 WrapperNode [2020-10-27 19:40:52,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:52,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:40:52,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:40:52,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:40:52,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (1/1) ... [2020-10-27 19:40:52,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:40:52,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:40:52,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:40:52,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:40:52,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (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 19:40:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:40:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:40:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:40:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 19:40:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:40:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:40:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:40:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:40:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:40:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-27 19:40:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 19:40:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:40:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-27 19:40:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-27 19:40:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:40:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:40:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:40:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:40:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:40:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:40:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:40:53,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:40:53,252 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 19:40:53,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:53 BoogieIcfgContainer [2020-10-27 19:40:53,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:40:53,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:40:53,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:40:53,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:40:53,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:40:52" (1/3) ... [2020-10-27 19:40:53,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c47ddd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:53, skipping insertion in model container [2020-10-27 19:40:53,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:52" (2/3) ... [2020-10-27 19:40:53,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c47ddd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:53, skipping insertion in model container [2020-10-27 19:40:53,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:53" (3/3) ... [2020-10-27 19:40:53,264 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2020-10-27 19:40:53,277 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:40:53,283 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:40:53,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:40:53,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:40:53,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:40:53,326 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:40:53,326 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:40:53,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:40:53,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:40:53,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:40:53,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:40:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 19:40:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:40:53,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:53,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:53,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash -531864736, now seen corresponding path program 1 times [2020-10-27 19:40:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:53,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591448353] [2020-10-27 19:40:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:54,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:54,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:40:54,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:40:54,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-27 19:40:54,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:40:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:40:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:40:54,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:40:54,255 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 19:40:54,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:54,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:54,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:54,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:54,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:40:54,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:54,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:54,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:54,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:54,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:54,297 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 19:40:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591448353] [2020-10-27 19:40:54,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:54,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:40:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320573300] [2020-10-27 19:40:54,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:40:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:40:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:54,324 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-27 19:40:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:54,487 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-27 19:40:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:40:54,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 19:40:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:54,498 INFO L225 Difference]: With dead ends: 37 [2020-10-27 19:40:54,498 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 19:40:54,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:40:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 19:40:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 19:40:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 19:40:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-27 19:40:54,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2020-10-27 19:40:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-27 19:40:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:40:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-27 19:40:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:40:54,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:54,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:54,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:40:54,546 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash -63639589, now seen corresponding path program 1 times [2020-10-27 19:40:54,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:54,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907386286] [2020-10-27 19:40:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:54,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:54,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:40:54,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:54,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 19:40:54,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:54,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:40:54,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:54,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:40:54,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:54,782 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 19:40:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:54,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:54,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:54,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:54,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:54,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 19:40:54,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:54,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:54,841 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 19:40:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907386286] [2020-10-27 19:40:54,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:54,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:40:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067875380] [2020-10-27 19:40:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:40:54,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:40:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:40:54,851 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-27 19:40:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:54,991 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-27 19:40:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:40:54,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 19:40:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:54,993 INFO L225 Difference]: With dead ends: 32 [2020-10-27 19:40:54,993 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:40:54,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:40:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:40:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-10-27 19:40:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 19:40:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-27 19:40:55,010 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-10-27 19:40:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:55,011 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-27 19:40:55,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:40:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-27 19:40:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:40:55,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:55,012 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 19:40:55,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:40:55,013 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2130316911, now seen corresponding path program 1 times [2020-10-27 19:40:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:55,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251732053] [2020-10-27 19:40:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:55,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:40:55,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:40:55,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 19:40:55,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:40:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:40:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:40:55,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:55,442 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 19:40:55,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:55,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:55,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:40:55,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:55,461 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 19:40:55,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251732053] [2020-10-27 19:40:55,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:55,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:40:55,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477640608] [2020-10-27 19:40:55,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:40:55,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:40:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:40:55,464 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-10-27 19:40:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:55,545 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-10-27 19:40:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:40:55,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 19:40:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:55,547 INFO L225 Difference]: With dead ends: 34 [2020-10-27 19:40:55,547 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 19:40:55,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:40:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 19:40:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 19:40:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 19:40:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 19:40:55,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-27 19:40:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:55,554 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 19:40:55,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:40:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 19:40:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:40:55,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:55,556 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 19:40:55,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:40:55,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -326240332, now seen corresponding path program 1 times [2020-10-27 19:40:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:55,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821891721] [2020-10-27 19:40:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:55,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:40:55,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:55,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 19:40:55,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:55,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:40:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:40:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:55,771 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 19:40:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:55,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:55,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:40:55,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:55,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:55,790 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 19:40:55,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821891721] [2020-10-27 19:40:55,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:55,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:40:55,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673195358] [2020-10-27 19:40:55,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:40:55,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:40:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:55,793 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 19:40:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:55,914 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-27 19:40:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:40:55,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 19:40:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:55,917 INFO L225 Difference]: With dead ends: 34 [2020-10-27 19:40:55,917 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 19:40:55,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 19:40:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 19:40:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 19:40:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 19:40:55,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-10-27 19:40:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:55,925 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 19:40:55,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:40:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 19:40:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:40:55,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:55,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:55,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:40:55,926 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:55,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1996319501, now seen corresponding path program 2 times [2020-10-27 19:40:55,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:55,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072986799] [2020-10-27 19:40:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:56,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:40:56,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:56,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 19:40:56,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:40:56,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:56,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:40:56,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:56,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:56,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:56,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:40:56,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:56,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:56,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072986799] [2020-10-27 19:40:56,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:40:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506311164] [2020-10-27 19:40:56,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:40:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:40:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:40:56,188 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-27 19:40:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:56,297 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-27 19:40:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:40:56,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 19:40:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:56,301 INFO L225 Difference]: With dead ends: 38 [2020-10-27 19:40:56,301 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:40:56,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:40:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:40:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 19:40:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 19:40:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 19:40:56,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-27 19:40:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:56,315 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 19:40:56,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:40:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 19:40:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:40:56,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:56,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:56,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:40:56,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1956541978, now seen corresponding path program 3 times [2020-10-27 19:40:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:56,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897316145] [2020-10-27 19:40:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:40:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 19:40:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:40:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:40:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:56,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:56,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:40:56,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:56,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897316145] [2020-10-27 19:40:56,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:56,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:40:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757753165] [2020-10-27 19:40:56,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:40:56,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:40:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:40:56,678 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-10-27 19:40:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:56,788 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 19:40:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:40:56,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:40:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:56,791 INFO L225 Difference]: With dead ends: 42 [2020-10-27 19:40:56,791 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 19:40:56,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:40:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 19:40:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 19:40:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 19:40:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 19:40:56,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-27 19:40:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:56,808 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 19:40:56,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:40:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 19:40:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:40:56,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:56,811 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:56,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:40:56,811 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:56,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2139581377, now seen corresponding path program 4 times [2020-10-27 19:40:56,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:56,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860404740] [2020-10-27 19:40:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:57,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:40:57,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:40:57,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:57,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:57,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:57,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860404740] [2020-10-27 19:40:57,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:57,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:40:57,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407175200] [2020-10-27 19:40:57,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:40:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:40:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:40:57,241 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-27 19:40:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:57,340 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-27 19:40:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:40:57,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 19:40:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:57,342 INFO L225 Difference]: With dead ends: 46 [2020-10-27 19:40:57,342 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 19:40:57,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:40:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 19:40:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 19:40:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 19:40:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 19:40:57,349 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2020-10-27 19:40:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:57,364 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 19:40:57,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:40:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 19:40:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:40:57,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:57,365 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:57,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:40:57,366 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1545549288, now seen corresponding path program 5 times [2020-10-27 19:40:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:57,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879356862] [2020-10-27 19:40:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:57,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:57,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:57,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:40:57,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:40:57,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:57,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:57,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:57,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:57,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:57,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:40:57,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:57,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:57,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879356862] [2020-10-27 19:40:57,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:57,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:40:57,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039598737] [2020-10-27 19:40:57,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:40:57,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:57,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:40:57,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:40:57,674 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 9 states. [2020-10-27 19:40:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:57,900 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-27 19:40:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:40:57,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 19:40:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:57,901 INFO L225 Difference]: With dead ends: 50 [2020-10-27 19:40:57,901 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:40:57,902 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 19:40:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:40:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-27 19:40:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:40:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 19:40:57,909 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-27 19:40:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:57,909 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 19:40:57,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:40:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 19:40:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:40:57,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:57,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:57,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:40:57,911 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash -904369295, now seen corresponding path program 6 times [2020-10-27 19:40:57,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:57,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127772331] [2020-10-27 19:40:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:57,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:40:58,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-27 19:40:58,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:40:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:40:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:58,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:58,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:58,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:40:58,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:58,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:40:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:58,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127772331] [2020-10-27 19:40:58,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:58,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:40:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180684486] [2020-10-27 19:40:58,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:40:58,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:40:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:40:58,372 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2020-10-27 19:40:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:58,463 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 19:40:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:40:58,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 19:40:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:58,464 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:40:58,465 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 19:40:58,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:40:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 19:40:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 19:40:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:40:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 19:40:58,479 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-27 19:40:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:58,479 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 19:40:58,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:40:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 19:40:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:40:58,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:58,485 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:58,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:40:58,486 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:58,486 INFO L82 PathProgramCache]: Analyzing trace with hash -562186166, now seen corresponding path program 7 times [2020-10-27 19:40:58,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:58,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436773162] [2020-10-27 19:40:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:40:58,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 19:40:58,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:40:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:40:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:58,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:58,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:58,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:58,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436773162] [2020-10-27 19:40:58,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:58,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:40:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271352782] [2020-10-27 19:40:58,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:40:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:40:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:40:58,934 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 11 states. [2020-10-27 19:40:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:59,032 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-27 19:40:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:40:59,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 19:40:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:59,033 INFO L225 Difference]: With dead ends: 58 [2020-10-27 19:40:59,034 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 19:40:59,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:40:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 19:40:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 19:40:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:40:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 19:40:59,048 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-27 19:40:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:59,049 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 19:40:59,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:40:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 19:40:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:40:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:59,053 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:59,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:40:59,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1934553251, now seen corresponding path program 8 times [2020-10-27 19:40:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:59,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369735534] [2020-10-27 19:40:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:59,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:59,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:40:59,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:59,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 19:40:59,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:40:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 19:40:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:59,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:59,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:59,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:59,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:59,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:59,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:59,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369735534] [2020-10-27 19:40:59,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:59,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:40:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626216183] [2020-10-27 19:40:59,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:40:59,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:40:59,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:40:59,587 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-27 19:40:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:59,674 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-27 19:40:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:40:59,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 19:40:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:59,676 INFO L225 Difference]: With dead ends: 62 [2020-10-27 19:40:59,676 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:40:59,677 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 19:40:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:40:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-27 19:40:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:40:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 19:40:59,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-27 19:40:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:59,684 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 19:40:59,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:40:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 19:40:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:40:59,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:59,685 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:59,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:40:59,686 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1370117244, now seen corresponding path program 9 times [2020-10-27 19:40:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217764284] [2020-10-27 19:40:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:59,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:59,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:40:59,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 19:40:59,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:40:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:40:59,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:00,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:00,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:00,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:00,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:00,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:00,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217764284] [2020-10-27 19:41:00,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:00,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:41:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456246845] [2020-10-27 19:41:00,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:41:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:41:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:41:00,189 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 13 states. [2020-10-27 19:41:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:00,277 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-27 19:41:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:41:00,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 19:41:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:00,279 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:41:00,279 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 19:41:00,280 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 19:41:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 19:41:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-27 19:41:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 19:41:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 19:41:00,286 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-10-27 19:41:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:00,287 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 19:41:00,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:41:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 19:41:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:41:00,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:00,288 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:00,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:41:00,289 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash 160310229, now seen corresponding path program 10 times [2020-10-27 19:41:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:00,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891661105] [2020-10-27 19:41:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:00,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:00,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:00,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:41:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:00,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:00,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:00,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:00,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:00,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:00,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891661105] [2020-10-27 19:41:00,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:00,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:41:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248466815] [2020-10-27 19:41:00,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:41:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:41:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:41:00,836 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 14 states. [2020-10-27 19:41:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:00,933 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-27 19:41:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:41:00,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-27 19:41:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:00,934 INFO L225 Difference]: With dead ends: 70 [2020-10-27 19:41:00,935 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:41:00,935 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 19:41:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:41:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-27 19:41:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 19:41:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 19:41:00,943 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-27 19:41:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:00,943 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 19:41:00,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:41:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 19:41:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:41:00,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:00,944 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:00,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:41:00,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2116510034, now seen corresponding path program 11 times [2020-10-27 19:41:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:00,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326295948] [2020-10-27 19:41:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:00,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:01,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:01,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 19:41:01,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:01,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-27 19:41:01,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:41:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 19:41:01,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:01,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:01,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:01,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:01,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:01,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:01,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:41:01,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:01,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326295948] [2020-10-27 19:41:01,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:01,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:41:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909988258] [2020-10-27 19:41:01,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:41:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:41:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:41:01,614 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 15 states. [2020-10-27 19:41:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:01,735 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-27 19:41:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:41:01,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 19:41:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:01,736 INFO L225 Difference]: With dead ends: 74 [2020-10-27 19:41:01,736 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 19:41:01,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:41:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 19:41:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 19:41:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:41:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 19:41:01,745 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2020-10-27 19:41:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:01,745 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 19:41:01,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:41:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 19:41:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 19:41:01,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:01,747 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:01,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:41:01,747 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2008546041, now seen corresponding path program 12 times [2020-10-27 19:41:01,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:01,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421706150] [2020-10-27 19:41:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:01,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:02,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:02,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:41:02,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:02,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:02,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:02,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:02,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421706150] [2020-10-27 19:41:02,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:02,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:41:02,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225698390] [2020-10-27 19:41:02,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:41:02,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:41:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:41:02,472 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 16 states. [2020-10-27 19:41:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:02,580 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 19:41:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:41:02,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 19:41:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:02,583 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:41:02,583 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 19:41:02,584 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 19:41:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 19:41:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 19:41:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:41:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 19:41:02,599 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-27 19:41:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:02,600 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 19:41:02,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:41:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 19:41:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 19:41:02,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:02,603 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:02,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:41:02,604 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1635423968, now seen corresponding path program 13 times [2020-10-27 19:41:02,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:02,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469871721] [2020-10-27 19:41:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:03,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:03,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:41:03,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:03,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:03,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:03,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:03,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469871721] [2020-10-27 19:41:03,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:03,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:41:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193702212] [2020-10-27 19:41:03,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:41:03,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:41:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:41:03,417 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 17 states. [2020-10-27 19:41:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:03,544 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-27 19:41:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:41:03,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-10-27 19:41:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:03,546 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:41:03,546 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:41:03,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:41:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:41:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-27 19:41:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:41:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 19:41:03,563 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2020-10-27 19:41:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:03,563 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 19:41:03,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:41:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 19:41:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 19:41:03,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:03,564 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:03,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:41:03,564 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1492030521, now seen corresponding path program 14 times [2020-10-27 19:41:03,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:03,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335682906] [2020-10-27 19:41:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:03,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:04,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:04,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 19:41:04,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:04,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 19:41:04,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:41:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 19:41:04,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:04,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:04,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:04,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:04,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:04,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:41:04,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:41:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:04,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335682906] [2020-10-27 19:41:04,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:04,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:41:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704576611] [2020-10-27 19:41:04,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:41:04,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:41:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:41:04,426 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 18 states. [2020-10-27 19:41:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:04,562 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-27 19:41:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:41:04,563 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-27 19:41:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:04,564 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:41:04,564 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 19:41:04,565 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 19:41:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 19:41:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-27 19:41:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:41:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 19:41:04,572 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2020-10-27 19:41:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:04,572 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 19:41:04,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:41:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 19:41:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 19:41:04,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:04,579 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:04,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:41:04,580 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1359101202, now seen corresponding path program 15 times [2020-10-27 19:41:04,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:04,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655723346] [2020-10-27 19:41:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:05,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:05,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 19:41:05,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 19:41:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:05,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:05,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:05,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:41:05,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:05,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655723346] [2020-10-27 19:41:05,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:41:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392816115] [2020-10-27 19:41:05,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:41:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:41:05,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:41:05,583 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 19 states. [2020-10-27 19:41:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:05,750 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-27 19:41:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:41:05,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-10-27 19:41:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:05,752 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:41:05,752 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 19:41:05,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:41:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 19:41:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-27 19:41:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:41:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 19:41:05,763 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2020-10-27 19:41:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:05,763 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 19:41:05,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:41:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 19:41:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:41:05,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:05,766 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:05,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:41:05,767 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1391710571, now seen corresponding path program 16 times [2020-10-27 19:41:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:05,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016329596] [2020-10-27 19:41:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:06,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:41:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:41:06,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:06,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:06,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:06,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:41:06,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016329596] [2020-10-27 19:41:06,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:06,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:41:06,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677678579] [2020-10-27 19:41:06,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:41:06,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:41:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:41:06,742 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 20 states. [2020-10-27 19:41:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:06,880 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-27 19:41:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:41:06,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2020-10-27 19:41:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:06,881 INFO L225 Difference]: With dead ends: 94 [2020-10-27 19:41:06,881 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:41:06,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:41:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:41:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-27 19:41:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 19:41:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 19:41:06,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2020-10-27 19:41:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:06,887 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 19:41:06,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:41:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 19:41:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 19:41:06,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:06,888 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:06,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:41:06,889 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash 518099268, now seen corresponding path program 17 times [2020-10-27 19:41:06,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:06,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065531866] [2020-10-27 19:41:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:06,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:07,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:07,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 19:41:07,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:07,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 19:41:07,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:41:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:41:07,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:07,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:07,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065531866] [2020-10-27 19:41:07,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:07,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:41:07,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454495682] [2020-10-27 19:41:07,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:41:07,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:07,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:41:07,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:41:07,908 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 21 states. [2020-10-27 19:41:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:08,049 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-27 19:41:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:41:08,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2020-10-27 19:41:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:08,051 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:41:08,051 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:41:08,052 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 19:41:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:41:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 19:41:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:41:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 19:41:08,059 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-27 19:41:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:08,059 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 19:41:08,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:41:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 19:41:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 19:41:08,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:08,061 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:08,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:41:08,061 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1144406883, now seen corresponding path program 18 times [2020-10-27 19:41:08,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810961800] [2020-10-27 19:41:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:08,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:08,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:08,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 19:41:08,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:08,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-27 19:41:08,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:41:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:41:08,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:09,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:09,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:09,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:09,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:09,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:09,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810961800] [2020-10-27 19:41:09,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:09,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:41:09,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549702557] [2020-10-27 19:41:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:41:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:41:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:41:09,205 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 22 states. [2020-10-27 19:41:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:09,367 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-27 19:41:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:41:09,368 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2020-10-27 19:41:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:09,370 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:41:09,370 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 19:41:09,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:41:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 19:41:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-27 19:41:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:41:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 19:41:09,377 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2020-10-27 19:41:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:09,377 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 19:41:09,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:41:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 19:41:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 19:41:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:09,379 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:09,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:41:09,379 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash 126522230, now seen corresponding path program 19 times [2020-10-27 19:41:09,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:09,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570502841] [2020-10-27 19:41:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:10,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:10,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 19:41:10,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-27 19:41:10,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:41:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 19:41:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:10,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:10,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:10,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570502841] [2020-10-27 19:41:10,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:10,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:41:10,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631700281] [2020-10-27 19:41:10,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:41:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:41:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:41:10,617 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 23 states. [2020-10-27 19:41:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:10,755 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-27 19:41:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:41:10,759 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2020-10-27 19:41:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:10,761 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:41:10,761 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:41:10,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:41:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:41:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-27 19:41:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:41:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 19:41:10,767 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2020-10-27 19:41:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:10,767 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 19:41:10,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:41:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 19:41:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 19:41:10,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:10,768 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:10,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:41:10,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1189238223, now seen corresponding path program 20 times [2020-10-27 19:41:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:10,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652742678] [2020-10-27 19:41:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:11,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:41:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 19:41:11,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:12,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:12,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:12,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:12,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:12,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:12,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:12,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:12,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:12,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652742678] [2020-10-27 19:41:12,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:12,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:41:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095992672] [2020-10-27 19:41:12,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:41:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:41:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:41:12,085 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 24 states. [2020-10-27 19:41:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:12,235 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-10-27 19:41:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:41:12,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-10-27 19:41:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:12,237 INFO L225 Difference]: With dead ends: 110 [2020-10-27 19:41:12,237 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:41:12,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:41:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:41:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-27 19:41:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:41:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-27 19:41:12,243 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2020-10-27 19:41:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:12,243 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-27 19:41:12,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:41:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-27 19:41:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 19:41:12,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:12,244 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:12,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:41:12,245 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1250999384, now seen corresponding path program 21 times [2020-10-27 19:41:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:12,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322878394] [2020-10-27 19:41:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:13,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:13,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 19:41:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:13,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:13,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:13,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322878394] [2020-10-27 19:41:13,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:13,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:41:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428417988] [2020-10-27 19:41:13,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:41:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:13,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:41:13,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:41:13,610 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 25 states. [2020-10-27 19:41:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:13,819 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-27 19:41:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:41:13,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-10-27 19:41:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:13,821 INFO L225 Difference]: With dead ends: 114 [2020-10-27 19:41:13,821 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 19:41:13,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:41:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 19:41:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-27 19:41:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 19:41:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-27 19:41:13,829 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2020-10-27 19:41:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:13,829 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-27 19:41:13,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:41:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-27 19:41:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 19:41:13,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:13,831 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:13,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:41:13,831 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash 363830529, now seen corresponding path program 22 times [2020-10-27 19:41:13,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:13,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127994701] [2020-10-27 19:41:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:13,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:14,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:14,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 19:41:14,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-27 19:41:14,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:14,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:41:14,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:14,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 19:41:14,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:15,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:15,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:15,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:15,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:15,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:15,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:15,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:15,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:15,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:15,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:15,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127994701] [2020-10-27 19:41:15,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:15,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:41:15,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514581408] [2020-10-27 19:41:15,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:41:15,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:15,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:41:15,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:41:15,334 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 26 states. [2020-10-27 19:41:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:15,492 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-27 19:41:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:41:15,493 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2020-10-27 19:41:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:15,494 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:41:15,494 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 19:41:15,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:41:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 19:41:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-27 19:41:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:41:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 19:41:15,501 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-27 19:41:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:15,502 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 19:41:15,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:41:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 19:41:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 19:41:15,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:15,503 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:15,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:41:15,503 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1090626010, now seen corresponding path program 23 times [2020-10-27 19:41:15,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:15,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277128081] [2020-10-27 19:41:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:41:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 19:41:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:17,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:17,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:17,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:17,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:17,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277128081] [2020-10-27 19:41:17,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:17,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 19:41:17,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080111743] [2020-10-27 19:41:17,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 19:41:17,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 19:41:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:41:17,066 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 27 states. [2020-10-27 19:41:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:17,223 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-10-27 19:41:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:41:17,224 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-27 19:41:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:17,225 INFO L225 Difference]: With dead ends: 122 [2020-10-27 19:41:17,225 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:41:17,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:41:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:41:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-27 19:41:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:41:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-27 19:41:17,232 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2020-10-27 19:41:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:17,233 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-27 19:41:17,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 19:41:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-27 19:41:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 19:41:17,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:17,234 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:17,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:41:17,235 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1214016973, now seen corresponding path program 24 times [2020-10-27 19:41:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:17,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205459428] [2020-10-27 19:41:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:17,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:18,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:41:18,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:18,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 19:41:18,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:18,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:18,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:18,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:18,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:18,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:18,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205459428] [2020-10-27 19:41:18,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:18,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:41:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055896614] [2020-10-27 19:41:18,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:41:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:41:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:41:18,843 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 28 states. [2020-10-27 19:41:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:19,013 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-10-27 19:41:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:41:19,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-10-27 19:41:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:19,015 INFO L225 Difference]: With dead ends: 126 [2020-10-27 19:41:19,015 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 19:41:19,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:41:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 19:41:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-10-27 19:41:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 19:41:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-27 19:41:19,022 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 109 [2020-10-27 19:41:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:19,022 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-27 19:41:19,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:41:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-27 19:41:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 19:41:19,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:19,024 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:19,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:41:19,024 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash 817081868, now seen corresponding path program 25 times [2020-10-27 19:41:19,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:19,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267802268] [2020-10-27 19:41:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:19,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:19,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:19,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:41:19,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 19:41:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:20,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:20,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:20,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:20,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:20,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267802268] [2020-10-27 19:41:20,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:20,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:41:20,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800508330] [2020-10-27 19:41:20,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:41:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:41:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:41:20,547 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 29 states. [2020-10-27 19:41:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:20,748 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-10-27 19:41:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:41:20,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2020-10-27 19:41:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:20,750 INFO L225 Difference]: With dead ends: 130 [2020-10-27 19:41:20,750 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:41:20,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:41:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:41:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-10-27 19:41:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 19:41:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-27 19:41:20,757 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 113 [2020-10-27 19:41:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:20,757 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-27 19:41:20,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:41:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-27 19:41:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 19:41:20,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:20,759 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:20,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:41:20,759 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 707802469, now seen corresponding path program 26 times [2020-10-27 19:41:20,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:20,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804082670] [2020-10-27 19:41:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:21,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:21,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 19:41:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:22,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:22,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:22,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:22,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:22,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:22,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:22,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804082670] [2020-10-27 19:41:22,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:22,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 19:41:22,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473893497] [2020-10-27 19:41:22,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 19:41:22,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 19:41:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:41:22,387 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 30 states. [2020-10-27 19:41:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:22,614 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-10-27 19:41:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:41:22,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2020-10-27 19:41:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:22,617 INFO L225 Difference]: With dead ends: 134 [2020-10-27 19:41:22,617 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 19:41:22,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:41:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 19:41:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-27 19:41:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 19:41:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-10-27 19:41:22,626 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 117 [2020-10-27 19:41:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:22,627 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-10-27 19:41:22,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 19:41:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-10-27 19:41:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 19:41:22,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:22,631 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:22,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:41:22,632 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2029479998, now seen corresponding path program 27 times [2020-10-27 19:41:22,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:22,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365920632] [2020-10-27 19:41:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:22,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:23,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 19:41:23,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:24,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:24,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:24,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:24,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365920632] [2020-10-27 19:41:24,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:24,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:41:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407580877] [2020-10-27 19:41:24,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:41:24,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:41:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:41:24,302 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 31 states. [2020-10-27 19:41:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:24,482 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-10-27 19:41:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:41:24,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-27 19:41:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:24,484 INFO L225 Difference]: With dead ends: 138 [2020-10-27 19:41:24,485 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 19:41:24,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:41:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 19:41:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-27 19:41:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 19:41:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-27 19:41:24,501 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-27 19:41:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:24,501 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-27 19:41:24,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 19:41:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-27 19:41:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 19:41:24,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:24,503 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:24,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:41:24,503 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -658012521, now seen corresponding path program 28 times [2020-10-27 19:41:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:24,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839533564] [2020-10-27 19:41:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:24,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:25,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:25,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 19:41:25,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:26,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:26,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839533564] [2020-10-27 19:41:26,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:26,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 19:41:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997299172] [2020-10-27 19:41:26,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 19:41:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 19:41:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:41:26,162 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 32 states. [2020-10-27 19:41:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:26,335 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-10-27 19:41:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 19:41:26,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2020-10-27 19:41:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:26,338 INFO L225 Difference]: With dead ends: 142 [2020-10-27 19:41:26,338 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:41:26,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:41:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:41:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-27 19:41:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 19:41:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-27 19:41:26,346 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2020-10-27 19:41:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:26,346 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-27 19:41:26,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 19:41:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-27 19:41:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 19:41:26,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:26,347 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:26,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:41:26,348 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2084491376, now seen corresponding path program 29 times [2020-10-27 19:41:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:26,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901938729] [2020-10-27 19:41:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:27,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:27,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 19:41:27,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-27 19:41:27,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 19:41:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:27,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 19:41:27,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:28,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:28,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:28,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:28,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:28,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:28,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:28,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:28,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:28,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901938729] [2020-10-27 19:41:28,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:28,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 19:41:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372550318] [2020-10-27 19:41:28,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 19:41:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 19:41:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:41:28,146 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 33 states. [2020-10-27 19:41:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:28,330 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2020-10-27 19:41:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:41:28,331 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2020-10-27 19:41:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:28,333 INFO L225 Difference]: With dead ends: 146 [2020-10-27 19:41:28,333 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:41:28,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:41:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:41:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-27 19:41:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:41:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-10-27 19:41:28,342 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 129 [2020-10-27 19:41:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:28,345 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-10-27 19:41:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 19:41:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-10-27 19:41:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 19:41:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:28,346 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:28,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:41:28,347 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1663334967, now seen corresponding path program 30 times [2020-10-27 19:41:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077793438] [2020-10-27 19:41:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:28,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:29,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:29,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 915 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 19:41:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:30,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:30,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:30,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:30,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:30,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:30,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077793438] [2020-10-27 19:41:30,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:30,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 19:41:30,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810815904] [2020-10-27 19:41:30,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 19:41:30,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 19:41:30,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:41:30,139 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 34 states. [2020-10-27 19:41:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:30,361 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-10-27 19:41:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:41:30,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2020-10-27 19:41:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:30,364 INFO L225 Difference]: With dead ends: 150 [2020-10-27 19:41:30,364 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 19:41:30,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:41:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 19:41:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-10-27 19:41:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 19:41:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-27 19:41:30,372 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 133 [2020-10-27 19:41:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:30,372 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-27 19:41:30,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 19:41:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-27 19:41:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 19:41:30,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:30,373 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:41:30,374 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash 184280738, now seen corresponding path program 31 times [2020-10-27 19:41:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260032671] [2020-10-27 19:41:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 19:41:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:31,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 19:41:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:32,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:32,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:32,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:32,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:32,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:32,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:32,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260032671] [2020-10-27 19:41:32,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:32,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 19:41:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107014289] [2020-10-27 19:41:32,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 19:41:32,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 19:41:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:41:32,297 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 35 states. [2020-10-27 19:41:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:32,545 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-10-27 19:41:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 19:41:32,546 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2020-10-27 19:41:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:32,550 INFO L225 Difference]: With dead ends: 154 [2020-10-27 19:41:32,550 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 19:41:32,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:41:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 19:41:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-27 19:41:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 19:41:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-10-27 19:41:32,558 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 137 [2020-10-27 19:41:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:32,560 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-10-27 19:41:32,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 19:41:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-10-27 19:41:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 19:41:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:32,561 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:32,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:41:32,561 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1109511429, now seen corresponding path program 32 times [2020-10-27 19:41:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:32,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938744750] [2020-10-27 19:41:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:33,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:33,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 19:41:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:34,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:34,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:34,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:34,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:34,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:34,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938744750] [2020-10-27 19:41:34,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:34,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 19:41:34,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039096323] [2020-10-27 19:41:34,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 19:41:34,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 19:41:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:41:34,722 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 36 states. [2020-10-27 19:41:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:34,932 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-10-27 19:41:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 19:41:34,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2020-10-27 19:41:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:34,934 INFO L225 Difference]: With dead ends: 158 [2020-10-27 19:41:34,934 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 19:41:34,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:41:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 19:41:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 19:41:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 19:41:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-27 19:41:34,945 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 141 [2020-10-27 19:41:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:34,945 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-27 19:41:34,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 19:41:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-27 19:41:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 19:41:34,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:34,946 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:34,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:41:34,947 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1671473876, now seen corresponding path program 33 times [2020-10-27 19:41:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365801443] [2020-10-27 19:41:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:36,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 19:41:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:37,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:37,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:37,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365801443] [2020-10-27 19:41:37,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:37,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 19:41:37,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720422822] [2020-10-27 19:41:37,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 19:41:37,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:37,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 19:41:37,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:41:37,075 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 37 states. [2020-10-27 19:41:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:37,271 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-10-27 19:41:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 19:41:37,272 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2020-10-27 19:41:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:37,273 INFO L225 Difference]: With dead ends: 162 [2020-10-27 19:41:37,273 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 19:41:37,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:41:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 19:41:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-10-27 19:41:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 19:41:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-27 19:41:37,287 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 145 [2020-10-27 19:41:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:37,287 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-27 19:41:37,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 19:41:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-27 19:41:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 19:41:37,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:37,288 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:37,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:41:37,289 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash -247362003, now seen corresponding path program 34 times [2020-10-27 19:41:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:37,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307495592] [2020-10-27 19:41:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:37,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:38,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:38,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 19:41:38,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:38,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-27 19:41:38,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 19:41:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 19:41:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:39,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:39,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:39,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:39,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:39,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307495592] [2020-10-27 19:41:39,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:39,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 19:41:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892798971] [2020-10-27 19:41:39,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 19:41:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 19:41:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:41:39,736 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 38 states. [2020-10-27 19:41:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:39,946 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2020-10-27 19:41:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 19:41:39,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2020-10-27 19:41:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:39,948 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:41:39,948 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 19:41:39,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:41:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 19:41:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2020-10-27 19:41:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 19:41:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-27 19:41:39,957 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 149 [2020-10-27 19:41:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:39,957 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-27 19:41:39,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 19:41:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-27 19:41:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 19:41:39,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:39,958 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:39,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:41:39,959 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 849288454, now seen corresponding path program 35 times [2020-10-27 19:41:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:39,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722147545] [2020-10-27 19:41:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:41,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:41,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 19:41:41,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:42,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:42,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:42,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:42,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722147545] [2020-10-27 19:41:42,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:42,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 19:41:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147119241] [2020-10-27 19:41:42,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 19:41:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 19:41:42,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:41:42,358 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 39 states. [2020-10-27 19:41:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:42,605 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-10-27 19:41:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 19:41:42,606 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2020-10-27 19:41:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:42,607 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:41:42,607 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 19:41:42,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:41:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 19:41:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-27 19:41:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 19:41:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-10-27 19:41:42,613 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 153 [2020-10-27 19:41:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:42,613 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-10-27 19:41:42,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 19:41:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-10-27 19:41:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 19:41:42,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:42,614 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:42,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:41:42,614 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1517786975, now seen corresponding path program 36 times [2020-10-27 19:41:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:42,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470989076] [2020-10-27 19:41:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 19:41:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 19:41:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:45,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:45,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:45,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:45,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470989076] [2020-10-27 19:41:45,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 19:41:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080594179] [2020-10-27 19:41:45,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 19:41:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 19:41:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:41:45,196 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 40 states. [2020-10-27 19:41:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:45,486 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-10-27 19:41:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 19:41:45,486 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2020-10-27 19:41:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:45,488 INFO L225 Difference]: With dead ends: 174 [2020-10-27 19:41:45,488 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 19:41:45,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:41:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 19:41:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-27 19:41:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 19:41:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-10-27 19:41:45,495 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 157 [2020-10-27 19:41:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:45,496 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-10-27 19:41:45,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 19:41:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-10-27 19:41:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 19:41:45,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:45,497 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:45,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:41:45,497 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:45,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1838596808, now seen corresponding path program 37 times [2020-10-27 19:41:45,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:45,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19285080] [2020-10-27 19:41:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:46,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 19:41:46,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:48,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:48,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:48,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19285080] [2020-10-27 19:41:48,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:48,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 19:41:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362205048] [2020-10-27 19:41:48,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 19:41:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 19:41:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:41:48,123 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 41 states. [2020-10-27 19:41:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:48,363 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2020-10-27 19:41:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 19:41:48,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2020-10-27 19:41:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:48,366 INFO L225 Difference]: With dead ends: 178 [2020-10-27 19:41:48,366 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 19:41:48,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:41:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 19:41:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-27 19:41:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 19:41:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-27 19:41:48,373 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-27 19:41:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:48,373 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-27 19:41:48,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 19:41:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-27 19:41:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 19:41:48,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:48,374 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:48,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:41:48,375 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:48,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1963831663, now seen corresponding path program 38 times [2020-10-27 19:41:48,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:48,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870190064] [2020-10-27 19:41:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:49,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1481 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-27 19:41:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:51,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:51,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:51,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:51,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:51,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:41:51,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:51,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:51,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870190064] [2020-10-27 19:41:51,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:51,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 19:41:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237434594] [2020-10-27 19:41:51,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 19:41:51,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:51,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 19:41:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:41:51,214 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 42 states. [2020-10-27 19:41:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:51,453 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-10-27 19:41:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 19:41:51,454 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2020-10-27 19:41:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:51,456 INFO L225 Difference]: With dead ends: 182 [2020-10-27 19:41:51,456 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 19:41:51,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:41:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 19:41:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-27 19:41:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 19:41:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-10-27 19:41:51,464 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 165 [2020-10-27 19:41:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:51,464 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-10-27 19:41:51,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 19:41:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-10-27 19:41:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 19:41:51,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:51,466 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:51,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:41:51,466 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash 191957866, now seen corresponding path program 39 times [2020-10-27 19:41:51,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:51,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829590683] [2020-10-27 19:41:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:51,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:52,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:52,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 19:41:52,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:52,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-27 19:41:52,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:52,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 19:41:52,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:52,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 19:41:52,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:54,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:54,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829590683] [2020-10-27 19:41:54,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:54,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 19:41:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427011346] [2020-10-27 19:41:54,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 19:41:54,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 19:41:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:41:54,344 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 43 states. [2020-10-27 19:41:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:54,608 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-10-27 19:41:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 19:41:54,609 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2020-10-27 19:41:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:54,611 INFO L225 Difference]: With dead ends: 186 [2020-10-27 19:41:54,611 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 19:41:54,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:41:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 19:41:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2020-10-27 19:41:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 19:41:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2020-10-27 19:41:54,619 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 169 [2020-10-27 19:41:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:54,619 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2020-10-27 19:41:54,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 19:41:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2020-10-27 19:41:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 19:41:54,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:54,621 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:54,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:41:54,621 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2111589437, now seen corresponding path program 40 times [2020-10-27 19:41:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:54,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533564179] [2020-10-27 19:41:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:54,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:56,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 19:41:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-27 19:41:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:57,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:57,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:57,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:57,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:57,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:57,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:57,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:57,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:57,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533564179] [2020-10-27 19:41:57,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:57,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 19:41:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122596928] [2020-10-27 19:41:57,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 19:41:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 19:41:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:41:57,661 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 44 states. [2020-10-27 19:41:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:57,948 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2020-10-27 19:41:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 19:41:57,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2020-10-27 19:41:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:57,951 INFO L225 Difference]: With dead ends: 190 [2020-10-27 19:41:57,951 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 19:41:57,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:41:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 19:41:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-10-27 19:41:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 19:41:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2020-10-27 19:41:57,959 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 173 [2020-10-27 19:41:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:57,959 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2020-10-27 19:41:57,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 19:41:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2020-10-27 19:41:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 19:41:57,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:57,961 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:57,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:41:57,961 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1809283172, now seen corresponding path program 41 times [2020-10-27 19:41:57,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:57,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897754204] [2020-10-27 19:41:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1780 [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 19:41:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-27 19:41:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:01,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:01,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:01,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:01,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897754204] [2020-10-27 19:42:01,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:01,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 19:42:01,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762810437] [2020-10-27 19:42:01,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 19:42:01,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:01,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 19:42:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:42:01,343 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 45 states. [2020-10-27 19:42:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:01,681 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2020-10-27 19:42:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 19:42:01,682 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2020-10-27 19:42:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:01,684 INFO L225 Difference]: With dead ends: 194 [2020-10-27 19:42:01,684 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 19:42:01,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:42:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 19:42:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-27 19:42:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 19:42:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2020-10-27 19:42:01,691 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 177 [2020-10-27 19:42:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:01,692 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2020-10-27 19:42:01,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 19:42:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2020-10-27 19:42:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 19:42:01,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:01,693 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:01,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:42:01,694 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1384265995, now seen corresponding path program 42 times [2020-10-27 19:42:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:01,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45425958] [2020-10-27 19:42:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:01,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 19:42:03,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:03,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 19:42:03,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:04,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:04,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:04,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:04,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:04,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:04,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:04,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45425958] [2020-10-27 19:42:04,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:04,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 19:42:04,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423036075] [2020-10-27 19:42:04,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 19:42:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 19:42:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:42:04,962 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 46 states. [2020-10-27 19:42:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:05,279 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-10-27 19:42:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 19:42:05,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 181 [2020-10-27 19:42:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:05,282 INFO L225 Difference]: With dead ends: 198 [2020-10-27 19:42:05,282 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 19:42:05,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:42:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 19:42:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-27 19:42:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 19:42:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-27 19:42:05,290 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 181 [2020-10-27 19:42:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:05,290 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-27 19:42:05,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 19:42:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-27 19:42:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 19:42:05,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:05,292 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:05,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:42:05,292 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1862159922, now seen corresponding path program 43 times [2020-10-27 19:42:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:05,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065850312] [2020-10-27 19:42:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-27 19:42:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:08,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:08,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:09,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065850312] [2020-10-27 19:42:09,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:09,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 19:42:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892048641] [2020-10-27 19:42:09,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 19:42:09,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:09,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 19:42:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:42:09,013 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 47 states. [2020-10-27 19:42:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:09,306 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-10-27 19:42:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 19:42:09,306 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 185 [2020-10-27 19:42:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:09,308 INFO L225 Difference]: With dead ends: 202 [2020-10-27 19:42:09,308 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 19:42:09,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:42:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 19:42:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-27 19:42:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 19:42:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2020-10-27 19:42:09,315 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 185 [2020-10-27 19:42:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:09,316 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2020-10-27 19:42:09,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 19:42:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2020-10-27 19:42:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 19:42:09,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:09,317 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:09,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:42:09,318 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -395147225, now seen corresponding path program 44 times [2020-10-27 19:42:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:09,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378006656] [2020-10-27 19:42:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:11,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:11,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 19:42:11,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1839 [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-27 19:42:11,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:12,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:12,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:12,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378006656] [2020-10-27 19:42:12,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:12,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 19:42:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236712571] [2020-10-27 19:42:12,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 19:42:12,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 19:42:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:42:12,946 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 48 states. [2020-10-27 19:42:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:13,247 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2020-10-27 19:42:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 19:42:13,247 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 189 [2020-10-27 19:42:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:13,249 INFO L225 Difference]: With dead ends: 206 [2020-10-27 19:42:13,250 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 19:42:13,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:42:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 19:42:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-10-27 19:42:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 19:42:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-10-27 19:42:13,257 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 189 [2020-10-27 19:42:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:13,257 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-10-27 19:42:13,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 19:42:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-10-27 19:42:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 19:42:13,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:13,258 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:13,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:42:13,259 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -730953216, now seen corresponding path program 45 times [2020-10-27 19:42:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:13,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079975900] [2020-10-27 19:42:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:15,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:15,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-27 19:42:15,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:16,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:16,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:16,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:16,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:16,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:16,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:17,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079975900] [2020-10-27 19:42:17,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:17,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 19:42:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089976511] [2020-10-27 19:42:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 19:42:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 19:42:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:42:17,003 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 49 states. [2020-10-27 19:42:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:17,367 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-10-27 19:42:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 19:42:17,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 193 [2020-10-27 19:42:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:17,369 INFO L225 Difference]: With dead ends: 210 [2020-10-27 19:42:17,369 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 19:42:17,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:42:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 19:42:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-27 19:42:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 19:42:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2020-10-27 19:42:17,381 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 193 [2020-10-27 19:42:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:17,381 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2020-10-27 19:42:17,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 19:42:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2020-10-27 19:42:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 19:42:17,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:17,383 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:17,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:42:17,383 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974745, now seen corresponding path program 46 times [2020-10-27 19:42:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:17,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851348278] [2020-10-27 19:42:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:19,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:19,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 19:42:19,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:19,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2162 [2020-10-27 19:42:19,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:19,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 19:42:19,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:19,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-27 19:42:19,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:21,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:21,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:21,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851348278] [2020-10-27 19:42:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 19:42:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032315883] [2020-10-27 19:42:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 19:42:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 19:42:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 19:42:21,505 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 50 states. [2020-10-27 19:42:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:21,772 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2020-10-27 19:42:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 19:42:21,772 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 197 [2020-10-27 19:42:21,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:21,773 INFO L225 Difference]: With dead ends: 214 [2020-10-27 19:42:21,773 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 19:42:21,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 19:42:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 19:42:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-27 19:42:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 19:42:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2020-10-27 19:42:21,780 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 197 [2020-10-27 19:42:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:21,781 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2020-10-27 19:42:21,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 19:42:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2020-10-27 19:42:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 19:42:21,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:21,782 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:21,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:42:21,782 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1629417422, now seen corresponding path program 47 times [2020-10-27 19:42:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45425172] [2020-10-27 19:42:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:24,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:24,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 19:42:24,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:24,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-10-27 19:42:24,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:24,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 19:42:24,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:24,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-27 19:42:24,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:25,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:25,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:25,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:25,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:25,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:25,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:25,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:25,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:25,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45425172] [2020-10-27 19:42:25,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:25,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 19:42:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999216266] [2020-10-27 19:42:25,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 19:42:25,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 19:42:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:42:25,971 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 51 states. [2020-10-27 19:42:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:26,361 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2020-10-27 19:42:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 19:42:26,362 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 201 [2020-10-27 19:42:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:26,364 INFO L225 Difference]: With dead ends: 218 [2020-10-27 19:42:26,364 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 19:42:26,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:42:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 19:42:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-27 19:42:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 19:42:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-27 19:42:26,372 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 201 [2020-10-27 19:42:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:26,373 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-27 19:42:26,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 19:42:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-27 19:42:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 19:42:26,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:26,374 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:26,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:42:26,374 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash 552866955, now seen corresponding path program 48 times [2020-10-27 19:42:26,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:26,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910525660] [2020-10-27 19:42:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:28,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:28,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 19:42:28,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:28,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2256 [2020-10-27 19:42:28,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:28,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 19:42:28,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:28,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-27 19:42:28,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:30,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:30,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:30,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:30,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910525660] [2020-10-27 19:42:30,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:30,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 19:42:30,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801108740] [2020-10-27 19:42:30,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 19:42:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 19:42:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:42:30,769 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 52 states. [2020-10-27 19:42:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:31,133 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-10-27 19:42:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 19:42:31,134 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 205 [2020-10-27 19:42:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:31,137 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:42:31,137 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 19:42:31,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:42:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 19:42:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-27 19:42:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 19:42:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2020-10-27 19:42:31,144 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 205 [2020-10-27 19:42:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:31,144 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2020-10-27 19:42:31,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 19:42:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2020-10-27 19:42:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 19:42:31,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:31,146 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:31,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:42:31,146 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1630845852, now seen corresponding path program 49 times [2020-10-27 19:42:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:31,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413284804] [2020-10-27 19:42:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:33,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-27 19:42:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:35,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:35,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:35,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:35,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:35,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:35,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:35,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:35,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:35,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413284804] [2020-10-27 19:42:35,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:35,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 19:42:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541827255] [2020-10-27 19:42:35,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 19:42:35,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 19:42:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:42:35,618 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 53 states. [2020-10-27 19:42:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:35,997 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2020-10-27 19:42:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 19:42:35,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 209 [2020-10-27 19:42:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:36,000 INFO L225 Difference]: With dead ends: 226 [2020-10-27 19:42:36,000 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 19:42:36,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:42:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 19:42:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-27 19:42:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 19:42:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2020-10-27 19:42:36,008 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 209 [2020-10-27 19:42:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:36,008 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2020-10-27 19:42:36,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 19:42:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2020-10-27 19:42:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 19:42:36,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:36,010 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:36,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:42:36,010 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -77275203, now seen corresponding path program 50 times [2020-10-27 19:42:36,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:36,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079512077] [2020-10-27 19:42:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2466 [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 19:42:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-27 19:42:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:40,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:40,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:40,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:40,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079512077] [2020-10-27 19:42:40,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:40,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 19:42:40,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962254934] [2020-10-27 19:42:40,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 19:42:40,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 19:42:40,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:42:40,749 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 54 states. [2020-10-27 19:42:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:41,180 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2020-10-27 19:42:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 19:42:41,180 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 213 [2020-10-27 19:42:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:41,182 INFO L225 Difference]: With dead ends: 230 [2020-10-27 19:42:41,182 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 19:42:41,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:42:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 19:42:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-27 19:42:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 19:42:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2020-10-27 19:42:41,189 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 213 [2020-10-27 19:42:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:41,189 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2020-10-27 19:42:41,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 19:42:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2020-10-27 19:42:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 19:42:41,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:41,191 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:41,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:42:41,191 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash -258005354, now seen corresponding path program 51 times [2020-10-27 19:42:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:41,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058120323] [2020-10-27 19:42:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 19:42:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-27 19:42:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:46,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:46,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:46,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058120323] [2020-10-27 19:42:46,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:46,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 19:42:46,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763944345] [2020-10-27 19:42:46,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 19:42:46,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 19:42:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:42:46,077 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 55 states. [2020-10-27 19:42:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:46,487 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-10-27 19:42:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 19:42:46,488 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 217 [2020-10-27 19:42:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:46,490 INFO L225 Difference]: With dead ends: 234 [2020-10-27 19:42:46,490 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 19:42:46,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:42:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 19:42:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-27 19:42:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 19:42:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2020-10-27 19:42:46,498 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 217 [2020-10-27 19:42:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:46,499 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2020-10-27 19:42:46,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 19:42:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2020-10-27 19:42:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 19:42:46,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:46,501 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:46,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:42:46,501 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1623697169, now seen corresponding path program 52 times [2020-10-27 19:42:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:46,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482698202] [2020-10-27 19:42:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:49,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:49,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 19:42:49,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:49,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-27 19:42:49,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 19:42:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 19:42:49,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:51,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:51,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482698202] [2020-10-27 19:42:51,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:51,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 19:42:51,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095605532] [2020-10-27 19:42:51,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 19:42:51,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 19:42:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 19:42:51,534 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 56 states. [2020-10-27 19:42:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:51,973 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2020-10-27 19:42:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 19:42:51,974 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-10-27 19:42:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:51,976 INFO L225 Difference]: With dead ends: 238 [2020-10-27 19:42:51,976 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 19:42:51,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 19:42:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 19:42:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-27 19:42:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 19:42:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-27 19:42:51,983 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 221 [2020-10-27 19:42:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:51,983 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-27 19:42:51,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 19:42:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-27 19:42:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 19:42:51,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:51,985 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:51,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:42:51,985 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash 516863688, now seen corresponding path program 53 times [2020-10-27 19:42:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:51,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270653099] [2020-10-27 19:42:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:52,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:54,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2749 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 19:42:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:57,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:57,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270653099] [2020-10-27 19:42:57,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:57,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 19:42:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456691837] [2020-10-27 19:42:57,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 19:42:57,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:57,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 19:42:57,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:42:57,275 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 57 states. [2020-10-27 19:42:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:57,731 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-10-27 19:42:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 19:42:57,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 225 [2020-10-27 19:42:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:57,734 INFO L225 Difference]: With dead ends: 242 [2020-10-27 19:42:57,734 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 19:42:57,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:42:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 19:42:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-27 19:42:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 19:42:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-10-27 19:42:57,741 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 225 [2020-10-27 19:42:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:57,741 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-10-27 19:42:57,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 19:42:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-10-27 19:42:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 19:42:57,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:57,743 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:57,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:42:57,743 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 232816673, now seen corresponding path program 54 times [2020-10-27 19:42:57,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:57,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360856604] [2020-10-27 19:42:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:00,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:00,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 19:43:00,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3116 [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-27 19:43:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:03,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:03,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:03,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:03,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360856604] [2020-10-27 19:43:03,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:03,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 19:43:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817495507] [2020-10-27 19:43:03,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 19:43:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 19:43:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 19:43:03,487 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 58 states. [2020-10-27 19:43:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:03,963 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2020-10-27 19:43:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 19:43:03,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 229 [2020-10-27 19:43:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:03,966 INFO L225 Difference]: With dead ends: 246 [2020-10-27 19:43:03,966 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 19:43:03,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 19:43:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 19:43:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-27 19:43:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 19:43:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2020-10-27 19:43:03,975 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 229 [2020-10-27 19:43:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:03,975 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2020-10-27 19:43:03,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 19:43:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2020-10-27 19:43:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 19:43:03,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:03,977 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:03,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:43:03,978 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 567014650, now seen corresponding path program 55 times [2020-10-27 19:43:03,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:03,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974104812] [2020-10-27 19:43:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:04,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:07,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2990 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-27 19:43:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:09,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:09,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974104812] [2020-10-27 19:43:09,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:09,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 19:43:09,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331730461] [2020-10-27 19:43:09,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 19:43:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 19:43:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:43:09,669 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 59 states. [2020-10-27 19:43:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:10,131 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2020-10-27 19:43:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 19:43:10,132 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 233 [2020-10-27 19:43:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:10,134 INFO L225 Difference]: With dead ends: 250 [2020-10-27 19:43:10,134 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 19:43:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:43:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 19:43:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2020-10-27 19:43:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 19:43:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2020-10-27 19:43:10,142 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 233 [2020-10-27 19:43:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:10,143 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2020-10-27 19:43:10,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 19:43:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2020-10-27 19:43:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 19:43:10,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:10,145 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:10,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 19:43:10,145 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1227926189, now seen corresponding path program 56 times [2020-10-27 19:43:10,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:10,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548959411] [2020-10-27 19:43:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:13,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:13,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 19:43:13,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3083 [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-27 19:43:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:15,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:15,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:16,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548959411] [2020-10-27 19:43:16,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:16,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 19:43:16,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078764248] [2020-10-27 19:43:16,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 19:43:16,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 19:43:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 19:43:16,021 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 60 states. [2020-10-27 19:43:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:16,482 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2020-10-27 19:43:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 19:43:16,482 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 237 [2020-10-27 19:43:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:16,485 INFO L225 Difference]: With dead ends: 254 [2020-10-27 19:43:16,485 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 19:43:16,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 19:43:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 19:43:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-27 19:43:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 19:43:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-10-27 19:43:16,492 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 237 [2020-10-27 19:43:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:16,493 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-10-27 19:43:16,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 19:43:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-10-27 19:43:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-27 19:43:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:16,494 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:16,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 19:43:16,495 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1611194668, now seen corresponding path program 57 times [2020-10-27 19:43:16,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:16,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681226860] [2020-10-27 19:43:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3094 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-27 19:43:19,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:22,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:22,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:22,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681226860] [2020-10-27 19:43:22,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:22,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 19:43:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175648926] [2020-10-27 19:43:22,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 19:43:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 19:43:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:43:22,551 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 61 states. [2020-10-27 19:43:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:22,921 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-10-27 19:43:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 19:43:22,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 241 [2020-10-27 19:43:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:22,923 INFO L225 Difference]: With dead ends: 258 [2020-10-27 19:43:22,923 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 19:43:22,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:43:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 19:43:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-10-27 19:43:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 19:43:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2020-10-27 19:43:22,930 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 241 [2020-10-27 19:43:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:22,930 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2020-10-27 19:43:22,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 19:43:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2020-10-27 19:43:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 19:43:22,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:22,931 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:22,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 19:43:22,931 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:22,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2004277381, now seen corresponding path program 58 times [2020-10-27 19:43:22,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:22,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764210350] [2020-10-27 19:43:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:22,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:26,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3173 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-27 19:43:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:29,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:29,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:29,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764210350] [2020-10-27 19:43:29,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:29,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 19:43:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124870224] [2020-10-27 19:43:29,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 19:43:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 19:43:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 19:43:29,146 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 62 states. [2020-10-27 19:43:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:29,647 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-10-27 19:43:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 19:43:29,647 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 245 [2020-10-27 19:43:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:29,650 INFO L225 Difference]: With dead ends: 262 [2020-10-27 19:43:29,650 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 19:43:29,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 19:43:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 19:43:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2020-10-27 19:43:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 19:43:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2020-10-27 19:43:29,658 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 245 [2020-10-27 19:43:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:29,658 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2020-10-27 19:43:29,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 19:43:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2020-10-27 19:43:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 19:43:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:29,660 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:29,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 19:43:29,660 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1376289954, now seen corresponding path program 59 times [2020-10-27 19:43:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:29,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74764312] [2020-10-27 19:43:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:32,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3214 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-27 19:43:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:35,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:35,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:35,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:35,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:35,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:35,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:35,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:35,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74764312] [2020-10-27 19:43:36,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:36,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 19:43:36,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263791743] [2020-10-27 19:43:36,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 19:43:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:36,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 19:43:36,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:43:36,028 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 63 states. [2020-10-27 19:43:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:36,424 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2020-10-27 19:43:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 19:43:36,425 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 249 [2020-10-27 19:43:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:36,427 INFO L225 Difference]: With dead ends: 266 [2020-10-27 19:43:36,427 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 19:43:36,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:43:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 19:43:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-10-27 19:43:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 19:43:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2020-10-27 19:43:36,434 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 249 [2020-10-27 19:43:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:36,435 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2020-10-27 19:43:36,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 19:43:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2020-10-27 19:43:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 19:43:36,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:36,436 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:36,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 19:43:36,437 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1689712201, now seen corresponding path program 60 times [2020-10-27 19:43:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:36,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013699042] [2020-10-27 19:43:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3397 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-27 19:43:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:42,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:42,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:42,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:42,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:42,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:43,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013699042] [2020-10-27 19:43:43,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 19:43:43,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105681395] [2020-10-27 19:43:43,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 19:43:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:43,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 19:43:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 19:43:43,044 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 64 states. [2020-10-27 19:43:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:43,586 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-10-27 19:43:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 19:43:43,586 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 253 [2020-10-27 19:43:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:43,588 INFO L225 Difference]: With dead ends: 270 [2020-10-27 19:43:43,589 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 19:43:43,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 19:43:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 19:43:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2020-10-27 19:43:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 19:43:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2020-10-27 19:43:43,597 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 253 [2020-10-27 19:43:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:43,597 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2020-10-27 19:43:43,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 19:43:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2020-10-27 19:43:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-27 19:43:43,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:43,599 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:43,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 19:43:43,600 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:43,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1309262736, now seen corresponding path program 61 times [2020-10-27 19:43:43,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:43,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691390264] [2020-10-27 19:43:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3596 [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-27 19:43:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:47,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-27 19:43:47,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:50,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:50,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691390264] [2020-10-27 19:43:50,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:50,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-27 19:43:50,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065112117] [2020-10-27 19:43:50,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-27 19:43:50,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-27 19:43:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 19:43:50,524 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 65 states. [2020-10-27 19:43:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:51,100 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-10-27 19:43:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 19:43:51,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 257 [2020-10-27 19:43:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:51,103 INFO L225 Difference]: With dead ends: 274 [2020-10-27 19:43:51,103 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 19:43:51,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 19:43:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 19:43:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-10-27 19:43:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 19:43:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2020-10-27 19:43:51,109 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 257 [2020-10-27 19:43:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:51,109 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2020-10-27 19:43:51,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-27 19:43:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2020-10-27 19:43:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-27 19:43:51,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:51,111 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:51,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 19:43:51,111 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:51,111 INFO L82 PathProgramCache]: Analyzing trace with hash -608704279, now seen corresponding path program 62 times [2020-10-27 19:43:51,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:51,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961537905] [2020-10-27 19:43:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3711 [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:54,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-27 19:43:54,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:54,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 250 [2020-10-27 19:43:54,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:58,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:58,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:58,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:58,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:58,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:58,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:58,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:58,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961537905] [2020-10-27 19:43:58,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:58,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-27 19:43:58,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584275305] [2020-10-27 19:43:58,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-27 19:43:58,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-27 19:43:58,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 19:43:58,270 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 66 states. [2020-10-27 19:43:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:58,835 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2020-10-27 19:43:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 19:43:58,836 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 261 [2020-10-27 19:43:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:58,838 INFO L225 Difference]: With dead ends: 278 [2020-10-27 19:43:58,838 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 19:43:58,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 19:43:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 19:43:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-10-27 19:43:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 19:43:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-10-27 19:43:58,845 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 261 [2020-10-27 19:43:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:58,846 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-10-27 19:43:58,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-27 19:43:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-10-27 19:43:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 19:43:58,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:58,848 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:58,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 19:43:58,848 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash -256788030, now seen corresponding path program 63 times [2020-10-27 19:43:58,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:58,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498848618] [2020-10-27 19:43:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:02,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3782 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-27 19:44:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:06,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:06,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:06,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:06,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:06,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498848618] [2020-10-27 19:44:06,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:06,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-27 19:44:06,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166001565] [2020-10-27 19:44:06,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-27 19:44:06,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-27 19:44:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 19:44:06,192 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 67 states. [2020-10-27 19:44:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:06,710 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2020-10-27 19:44:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 19:44:06,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 265 [2020-10-27 19:44:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:06,713 INFO L225 Difference]: With dead ends: 282 [2020-10-27 19:44:06,713 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 19:44:06,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 19:44:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 19:44:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-10-27 19:44:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-27 19:44:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-10-27 19:44:06,721 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-10-27 19:44:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:06,721 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-10-27 19:44:06,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-27 19:44:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-10-27 19:44:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-27 19:44:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:06,723 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:06,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 19:44:06,723 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1614116379, now seen corresponding path program 64 times [2020-10-27 19:44:06,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:06,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814192159] [2020-10-27 19:44:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:10,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:10,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 19:44:10,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3850 [2020-10-27 19:44:10,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-27 19:44:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:10,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 19:44:10,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:14,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:14,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:14,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814192159] [2020-10-27 19:44:14,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:14,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-27 19:44:14,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127766845] [2020-10-27 19:44:14,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-27 19:44:14,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-27 19:44:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 19:44:14,279 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 68 states. [2020-10-27 19:44:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:14,859 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2020-10-27 19:44:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-27 19:44:14,860 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 269 [2020-10-27 19:44:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:14,862 INFO L225 Difference]: With dead ends: 286 [2020-10-27 19:44:14,862 INFO L226 Difference]: Without dead ends: 278 [2020-10-27 19:44:14,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 19:44:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-27 19:44:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2020-10-27 19:44:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 19:44:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2020-10-27 19:44:14,870 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 269 [2020-10-27 19:44:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:14,871 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2020-10-27 19:44:14,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-27 19:44:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2020-10-27 19:44:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-27 19:44:14,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:14,873 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:14,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 19:44:14,873 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1268687372, now seen corresponding path program 65 times [2020-10-27 19:44:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:14,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860489340] [2020-10-27 19:44:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:14,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:19,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:19,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 19:44:19,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4163 [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-27 19:44:19,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:22,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:22,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:22,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860489340] [2020-10-27 19:44:22,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:22,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-27 19:44:22,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319406587] [2020-10-27 19:44:22,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-27 19:44:22,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-27 19:44:22,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 19:44:22,834 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 69 states. [2020-10-27 19:44:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:23,417 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2020-10-27 19:44:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-27 19:44:23,418 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 273 [2020-10-27 19:44:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:23,420 INFO L225 Difference]: With dead ends: 290 [2020-10-27 19:44:23,420 INFO L226 Difference]: Without dead ends: 282 [2020-10-27 19:44:23,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 19:44:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-27 19:44:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2020-10-27 19:44:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 19:44:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2020-10-27 19:44:23,427 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 273 [2020-10-27 19:44:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:23,427 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2020-10-27 19:44:23,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-27 19:44:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2020-10-27 19:44:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-27 19:44:23,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:23,429 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:23,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 19:44:23,429 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1103908531, now seen corresponding path program 66 times [2020-10-27 19:44:23,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:23,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584720911] [2020-10-27 19:44:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:23,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4179 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 266 [2020-10-27 19:44:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:31,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:31,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:31,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584720911] [2020-10-27 19:44:31,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:31,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-27 19:44:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996368404] [2020-10-27 19:44:31,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-27 19:44:31,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-27 19:44:31,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 19:44:31,574 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 70 states. [2020-10-27 19:44:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:32,192 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2020-10-27 19:44:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-27 19:44:32,193 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 277 [2020-10-27 19:44:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:32,195 INFO L225 Difference]: With dead ends: 294 [2020-10-27 19:44:32,196 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 19:44:32,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 19:44:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 19:44:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2020-10-27 19:44:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-27 19:44:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2020-10-27 19:44:32,204 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 277 [2020-10-27 19:44:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:32,204 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2020-10-27 19:44:32,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-27 19:44:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2020-10-27 19:44:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-27 19:44:32,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:32,206 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:32,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 19:44:32,206 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash 629846054, now seen corresponding path program 67 times [2020-10-27 19:44:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:32,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163349957] [2020-10-27 19:44:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:36,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4531 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 270 [2020-10-27 19:44:36,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:40,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:44:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:40,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:40,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:40,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:44:40,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:44:40,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:40,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:44:40,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:44:40,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:44:40,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:44:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:44:40,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163349957] [2020-10-27 19:44:40,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:44:40,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-27 19:44:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486467768] [2020-10-27 19:44:40,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-27 19:44:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:44:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-27 19:44:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 19:44:40,720 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 71 states. [2020-10-27 19:44:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:44:41,199 INFO L93 Difference]: Finished difference Result 298 states and 300 transitions. [2020-10-27 19:44:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-27 19:44:41,200 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 281 [2020-10-27 19:44:41,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:44:41,202 INFO L225 Difference]: With dead ends: 298 [2020-10-27 19:44:41,202 INFO L226 Difference]: Without dead ends: 290 [2020-10-27 19:44:41,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 19:44:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-27 19:44:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-10-27 19:44:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 19:44:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2020-10-27 19:44:41,210 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 281 [2020-10-27 19:44:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:44:41,211 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2020-10-27 19:44:41,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-27 19:44:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2020-10-27 19:44:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 19:44:41,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:44:41,213 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:44:41,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 19:44:41,213 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:44:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:44:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash -115041665, now seen corresponding path program 68 times [2020-10-27 19:44:41,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:44:41,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121833918] [2020-10-27 19:44:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:44:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:44:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:44:45,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4502 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 274 [2020-10-27 19:44:45,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0