/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/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:13:26,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:13:26,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:13:26,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:13:26,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:13:26,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:13:26,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:13:26,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:13:26,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:13:26,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:13:26,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:13:26,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:13:26,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:13:26,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:13:26,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:13:26,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:13:26,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:13:26,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:13:26,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:13:26,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:13:26,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:13:26,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:13:26,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:13:26,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:13:26,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:13:26,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:13:26,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:13:26,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:13:26,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:13:26,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:13:26,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:13:26,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:13:26,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:13:26,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:13:26,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:13:26,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:13:26,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:13:26,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:13:26,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:13:26,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:13:26,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:13:26,185 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 20:13:26,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:13:26,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:13:26,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:13:26,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:13:26,214 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:13:26,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:13:26,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:13:26,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:13:26,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:13:26,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:13:26,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:13:26,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:13:26,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:13:26,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:13:26,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:13:26,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:13:26,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:13:26,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:13:26,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:13:26,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:13:26,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:13:26,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:13:26,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:13:26,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:13:26,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:13:26,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:13:26,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:13:26,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:13:26,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:13:26,676 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:13:26,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-27 20:13:26,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7fbef1f/9ef1592879fc4fe9b59131fc35c8ca73/FLAG568e10e74 [2020-10-27 20:13:27,397 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:13:27,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-27 20:13:27,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7fbef1f/9ef1592879fc4fe9b59131fc35c8ca73/FLAG568e10e74 [2020-10-27 20:13:27,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7fbef1f/9ef1592879fc4fe9b59131fc35c8ca73 [2020-10-27 20:13:27,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:13:27,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:13:27,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:27,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:13:27,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:13:27,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:27" (1/1) ... [2020-10-27 20:13:27,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583b9222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:27, skipping insertion in model container [2020-10-27 20:13:27,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:27" (1/1) ... [2020-10-27 20:13:27,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:13:27,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:13:27,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:27,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:13:27,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:28,008 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:13:28,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28 WrapperNode [2020-10-27 20:13:28,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:28,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:13:28,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:13:28,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:13:28,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (1/1) ... [2020-10-27 20:13:28,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:13:28,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:13:28,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:13:28,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:13:28,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (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 20:13:28,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:13:28,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:13:28,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:13:28,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:13:28,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:13:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:13:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:13:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:13:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:13:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:13:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:13:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:13:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:13:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:13:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:13:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:13:28,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:13:28,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:13:28,489 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:13:28,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:28 BoogieIcfgContainer [2020-10-27 20:13:28,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:13:28,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:13:28,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:13:28,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:13:28,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:13:27" (1/3) ... [2020-10-27 20:13:28,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f082de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:28, skipping insertion in model container [2020-10-27 20:13:28,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:28" (2/3) ... [2020-10-27 20:13:28,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f082de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:28, skipping insertion in model container [2020-10-27 20:13:28,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:28" (3/3) ... [2020-10-27 20:13:28,502 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2020-10-27 20:13:28,517 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:13:28,522 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:13:28,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:13:28,575 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:13:28,575 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:13:28,575 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:13:28,575 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:13:28,576 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:13:28,576 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:13:28,576 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:13:28,576 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:13:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:13:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:13:28,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:28,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:28,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:28,613 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 20:13:28,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:28,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143801553] [2020-10-27 20:13:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:28,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:28,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:13:28,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 20:13:28,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:28,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:13:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:28,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 20:13:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:29,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:29,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:29,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:29,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:13:29,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:29,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:13:29,094 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 20:13:29,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143801553] [2020-10-27 20:13:29,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:29,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:13:29,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172176769] [2020-10-27 20:13:29,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:13:29,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:13:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:13:29,151 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 20:13:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:29,288 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 20:13:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:13:29,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:13:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:29,307 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:13:29,307 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 20:13:29,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:13:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 20:13:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 20:13:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 20:13:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 20:13:29,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 20:13:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:29,373 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 20:13:29,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:13:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 20:13:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:13:29,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:29,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:29,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:13:29,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 20:13:29,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71392950] [2020-10-27 20:13:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:29,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:29,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:13:29,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:29,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 20:13:29,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:13:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:13:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:29,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:29,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:29,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:29,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:13:29,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:13:29,800 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 20:13:29,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71392950] [2020-10-27 20:13:29,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:29,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:13:29,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885909705] [2020-10-27 20:13:29,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:13:29,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:13:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:13:29,814 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 20:13:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:29,929 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 20:13:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:13:29,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:13:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:29,931 INFO L225 Difference]: With dead ends: 20 [2020-10-27 20:13:29,931 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:13:29,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:13:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:13:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:13:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:13:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 20:13:29,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 20:13:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:29,941 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 20:13:29,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:13:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 20:13:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:13:29,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:29,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:29,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:13:29,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 20:13:29,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:29,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707734371] [2020-10-27 20:13:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:13:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:13:30,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:30,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:30,304 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 20:13:30,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707734371] [2020-10-27 20:13:30,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:30,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:13:30,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650123750] [2020-10-27 20:13:30,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:13:30,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:13:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:13:30,307 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 20:13:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:30,478 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 20:13:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:13:30,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 20:13:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:30,479 INFO L225 Difference]: With dead ends: 21 [2020-10-27 20:13:30,479 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:13:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:13:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:13:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:13:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:13:30,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:13:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:30,487 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:13:30,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:13:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:13:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:13:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:30,488 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:30,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:13:30,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 20:13:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:30,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819433476] [2020-10-27 20:13:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:13:30,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 20:13:30,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:13:30,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:30,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:13:30,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:30,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:30,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:13:30,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819433476] [2020-10-27 20:13:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:30,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:13:30,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092321033] [2020-10-27 20:13:30,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:13:30,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:30,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:13:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:13:30,802 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 20:13:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:31,043 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 20:13:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:13:31,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 20:13:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:31,045 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:13:31,045 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:13:31,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:13:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:13:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:13:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:13:31,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:13:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:31,052 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:13:31,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:13:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:13:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:13:31,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:31,053 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:31,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:13:31,053 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 20:13:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:31,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502346774] [2020-10-27 20:13:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:13:31,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 20:13:31,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:13:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:13:31,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:31,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:13:31,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:31,386 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 20:13:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502346774] [2020-10-27 20:13:31,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:31,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:13:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318358318] [2020-10-27 20:13:31,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:13:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:13:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:13:31,400 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 20:13:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:31,723 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 20:13:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:13:31,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 20:13:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:31,725 INFO L225 Difference]: With dead ends: 23 [2020-10-27 20:13:31,725 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:13:31,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:13:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:13:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:13:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:13:31,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 20:13:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:31,733 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:13:31,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:13:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:13:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:13:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:31,735 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:31,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:13:31,735 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:31,736 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 20:13:31,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:31,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117089239] [2020-10-27 20:13:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:13:31,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:31,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:13:31,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:32,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:32,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:32,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:32,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117089239] [2020-10-27 20:13:32,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:32,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:13:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545392142] [2020-10-27 20:13:32,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:13:32,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:13:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:13:32,050 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 20:13:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:32,294 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:13:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:13:32,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 20:13:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:32,296 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:13:32,296 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:13:32,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:13:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:13:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:13:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:13:32,302 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 20:13:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:32,303 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:13:32,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:13:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:13:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:13:32,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:32,304 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:32,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:13:32,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 20:13:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:32,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545527649] [2020-10-27 20:13:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:13:32,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:13:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:32,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,692 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 20:13:32,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545527649] [2020-10-27 20:13:32,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:32,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:13:32,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828681412] [2020-10-27 20:13:32,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:13:32,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:32,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:13:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:32,695 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 20:13:33,002 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-27 20:13:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:33,158 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 20:13:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:13:33,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 20:13:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:33,159 INFO L225 Difference]: With dead ends: 25 [2020-10-27 20:13:33,160 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:13:33,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:13:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:13:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:13:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:13:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 20:13:33,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 20:13:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:33,166 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 20:13:33,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:13:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 20:13:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:13:33,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:33,167 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:33,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:13:33,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 20:13:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:33,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52174002] [2020-10-27 20:13:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:13:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 20:13:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:13:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:33,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:33,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:33,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:33,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:33,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:33,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:33,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52174002] [2020-10-27 20:13:33,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:33,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:13:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970190616] [2020-10-27 20:13:33,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:13:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:13:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:13:33,485 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 20:13:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:33,855 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:13:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:13:33,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 20:13:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:33,857 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:13:33,857 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:13:33,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:13:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:13:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:13:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:13:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 20:13:33,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 20:13:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:33,868 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 20:13:33,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:13:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 20:13:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:13:33,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:33,870 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:33,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:13:33,870 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 20:13:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:33,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025390886] [2020-10-27 20:13:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:34,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:13:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:13:34,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:34,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:34,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:34,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:34,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:34,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:34,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:34,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:34,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:34,307 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 20:13:34,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025390886] [2020-10-27 20:13:34,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:34,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:13:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646462451] [2020-10-27 20:13:34,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:13:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:13:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:13:34,309 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-27 20:13:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:34,765 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-27 20:13:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:13:34,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 20:13:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:34,767 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:13:34,767 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:13:34,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:13:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:13:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 20:13:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:13:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 20:13:34,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 20:13:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:34,774 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 20:13:34,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:13:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 20:13:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:13:34,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:34,775 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:34,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:13:34,775 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-27 20:13:34,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:34,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593940146] [2020-10-27 20:13:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:35,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:35,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:13:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:35,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:35,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:35,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:35,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:35,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593940146] [2020-10-27 20:13:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:13:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132615329] [2020-10-27 20:13:35,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:13:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:13:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:13:35,265 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-27 20:13:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:35,808 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 20:13:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:13:35,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 20:13:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:35,811 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:13:35,811 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:13:35,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:13:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 20:13:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:13:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 20:13:35,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-27 20:13:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:35,819 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 20:13:35,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:13:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 20:13:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:13:35,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:35,820 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:35,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:13:35,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-27 20:13:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:35,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467203752] [2020-10-27 20:13:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:35,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:36,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:36,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:13:36,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 20:13:36,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:13:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:13:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:36,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:36,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:36,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:36,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:36,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:13:36,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:36,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:36,298 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 20:13:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467203752] [2020-10-27 20:13:36,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:36,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:13:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340193844] [2020-10-27 20:13:36,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:13:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:13:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:13:36,301 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-27 20:13:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:36,918 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-27 20:13:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:13:36,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 20:13:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:36,923 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:13:36,924 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:13:36,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:13:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:13:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:13:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 20:13:36,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 20:13:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:36,932 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 20:13:36,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:13:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 20:13:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:13:36,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:36,933 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:36,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:13:36,934 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-27 20:13:36,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:36,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897338995] [2020-10-27 20:13:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:36,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:13:37,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:37,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:37,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:37,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:37,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:37,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:37,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:37,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897338995] [2020-10-27 20:13:37,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:37,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:13:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486763870] [2020-10-27 20:13:37,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:13:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:37,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:13:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:13:37,449 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 20:13:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:38,076 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 20:13:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:13:38,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 20:13:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:38,078 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:13:38,078 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:13:38,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:13:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:13:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:13:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 20:13:38,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 20:13:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:38,089 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 20:13:38,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:13:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 20:13:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:13:38,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:38,092 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:38,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:13:38,092 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-27 20:13:38,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:38,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500067962] [2020-10-27 20:13:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:38,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:13:38,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:38,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:38,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:38,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:38,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:38,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:38,690 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 20:13:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500067962] [2020-10-27 20:13:38,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:38,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:13:38,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104850594] [2020-10-27 20:13:38,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:13:38,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:38,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:13:38,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:13:38,693 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-27 20:13:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:39,413 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-27 20:13:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:13:39,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 20:13:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:39,415 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:13:39,415 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:13:39,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:13:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 20:13:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:13:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 20:13:39,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 20:13:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:39,423 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 20:13:39,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:13:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 20:13:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:13:39,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:39,424 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:39,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:13:39,424 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-27 20:13:39,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348839551] [2020-10-27 20:13:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:13:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:13:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:39,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:40,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:40,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:40,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:40,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:13:40,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:40,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:40,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:40,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:40,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348839551] [2020-10-27 20:13:40,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:40,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:13:40,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357836523] [2020-10-27 20:13:40,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:13:40,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:40,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:13:40,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:13:40,017 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 20:13:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:40,803 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 20:13:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:13:40,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 20:13:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:40,805 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:13:40,805 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:13:40,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:13:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 20:13:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:13:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 20:13:40,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 20:13:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:40,816 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 20:13:40,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:13:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 20:13:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:13:40,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:40,817 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:40,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:13:40,817 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-27 20:13:40,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:40,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396875335] [2020-10-27 20:13:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:41,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:13:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:41,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:41,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:41,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:41,545 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 20:13:41,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396875335] [2020-10-27 20:13:41,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:41,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:13:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559754674] [2020-10-27 20:13:41,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:13:41,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:41,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:13:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:13:41,550 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 20:13:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:42,409 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 20:13:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:13:42,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 20:13:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:42,412 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:13:42,412 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:13:42,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:13:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 20:13:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:13:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 20:13:42,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 20:13:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:42,419 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 20:13:42,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:13:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 20:13:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:13:42,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:42,420 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:42,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:13:42,420 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-27 20:13:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:42,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345786548] [2020-10-27 20:13:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:42,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:42,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:13:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:13:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:43,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345786548] [2020-10-27 20:13:43,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:43,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:13:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436328659] [2020-10-27 20:13:43,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:13:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:13:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:13:43,186 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-27 20:13:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:44,172 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 20:13:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:13:44,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-27 20:13:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:44,179 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:13:44,179 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:13:44,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:13:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 20:13:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:13:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 20:13:44,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 20:13:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:44,188 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 20:13:44,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:13:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 20:13:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:13:44,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:44,189 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:44,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:13:44,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-27 20:13:44,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:44,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92401547] [2020-10-27 20:13:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:44,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:44,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:13:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:44,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:44,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:44,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:44,980 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 20:13:44,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92401547] [2020-10-27 20:13:44,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:44,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:13:44,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320052824] [2020-10-27 20:13:44,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:13:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:44,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:13:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:13:44,983 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 20:13:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:46,037 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 20:13:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:13:46,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 20:13:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:46,038 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:13:46,038 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:13:46,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:13:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:13:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 20:13:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:13:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 20:13:46,046 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 20:13:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:46,047 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 20:13:46,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:13:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 20:13:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:13:46,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:46,048 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:46,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:13:46,048 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-27 20:13:46,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:46,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947301076] [2020-10-27 20:13:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:46,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:46,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:13:46,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:13:46,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:46,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:46,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:46,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:46,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947301076] [2020-10-27 20:13:46,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:13:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657567300] [2020-10-27 20:13:46,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:13:46,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:13:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:13:47,001 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-27 20:13:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:48,148 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 20:13:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:13:48,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-27 20:13:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:48,149 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:13:48,149 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:13:48,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:13:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:13:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 20:13:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:13:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 20:13:48,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 20:13:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:48,158 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 20:13:48,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:13:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 20:13:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:13:48,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:48,160 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:48,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:13:48,160 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-27 20:13:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319272231] [2020-10-27 20:13:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:48,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:13:48,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:13:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:49,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:49,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:49,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:49,251 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 20:13:49,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319272231] [2020-10-27 20:13:49,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:49,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:13:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103719749] [2020-10-27 20:13:49,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:13:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:13:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:13:49,253 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 20:13:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:50,408 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 20:13:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:13:50,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 20:13:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:50,410 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:13:50,410 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:13:50,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:13:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:13:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 20:13:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:13:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 20:13:50,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 20:13:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:50,417 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 20:13:50,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:13:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 20:13:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:13:50,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:50,419 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:50,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:13:50,419 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-27 20:13:50,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:50,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849023434] [2020-10-27 20:13:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:50,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:50,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:13:50,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:50,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-27 20:13:50,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:13:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:13:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:51,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:51,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:51,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849023434] [2020-10-27 20:13:51,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:51,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:13:51,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93277000] [2020-10-27 20:13:51,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:13:51,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:13:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:13:51,406 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 20:13:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:52,600 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 20:13:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:13:52,600 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 20:13:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:52,601 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:13:52,601 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:13:52,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:13:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:13:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 20:13:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:13:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 20:13:52,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 20:13:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:52,609 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 20:13:52,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:13:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 20:13:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:13:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:52,611 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:52,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:13:52,612 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-27 20:13:52,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:52,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961505644] [2020-10-27 20:13:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:53,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:53,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:13:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:53,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:53,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:53,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:53,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,813 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 20:13:53,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961505644] [2020-10-27 20:13:53,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:53,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:13:53,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084180902] [2020-10-27 20:13:53,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:13:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:13:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:13:53,819 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 20:13:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:55,177 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 20:13:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:13:55,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 20:13:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:55,184 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:13:55,184 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:13:55,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:13:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:13:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 20:13:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:13:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 20:13:55,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 20:13:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:55,199 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 20:13:55,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:13:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 20:13:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:13:55,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:55,200 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:55,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:13:55,200 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-27 20:13:55,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:55,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503508998] [2020-10-27 20:13:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:55,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:13:56,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:56,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503508998] [2020-10-27 20:13:56,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:56,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:13:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442851233] [2020-10-27 20:13:56,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:13:56,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:13:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:13:56,613 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-27 20:13:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:58,110 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 20:13:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:13:58,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-27 20:13:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:58,115 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:13:58,115 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:13:58,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:13:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:13:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 20:13:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:13:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 20:13:58,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 20:13:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:58,124 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 20:13:58,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:13:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 20:13:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:13:58,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:58,125 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:58,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:13:58,125 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-27 20:13:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:58,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980482842] [2020-10-27 20:13:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:58,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:58,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:13:58,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 20:13:58,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:13:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:13:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:59,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:59,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:59,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:59,445 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 20:13:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980482842] [2020-10-27 20:13:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:13:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078601443] [2020-10-27 20:13:59,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:13:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:13:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:13:59,448 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 20:14:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:01,104 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 20:14:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:14:01,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 20:14:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:01,105 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:14:01,105 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:14:01,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:14:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:14:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 20:14:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:14:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 20:14:01,114 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 20:14:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:01,114 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 20:14:01,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:14:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 20:14:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:14:01,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:01,115 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:01,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:14:01,115 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-27 20:14:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:01,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603207928] [2020-10-27 20:14:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:01,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:01,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:01,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:14:01,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:02,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:02,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:02,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:02,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:02,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603207928] [2020-10-27 20:14:02,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:02,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:14:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084262418] [2020-10-27 20:14:02,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:14:02,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:14:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:14:02,508 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-27 20:14:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:04,204 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 20:14:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:14:04,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-27 20:14:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:04,205 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:14:04,205 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:14:04,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:14:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:14:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 20:14:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:14:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 20:14:04,215 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 20:14:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:04,215 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 20:14:04,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:14:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 20:14:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:14:04,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:04,216 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:04,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:14:04,218 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-27 20:14:04,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:04,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621571938] [2020-10-27 20:14:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:04,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:04,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:14:04,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:04,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 20:14:05,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:14:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:14:05,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:05,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:05,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:05,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:05,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:05,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:05,720 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 20:14:05,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621571938] [2020-10-27 20:14:05,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:05,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:14:05,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87991364] [2020-10-27 20:14:05,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:14:05,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:05,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:14:05,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:14:05,722 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 20:14:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:07,664 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 20:14:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:14:07,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 20:14:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:07,666 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:14:07,666 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:14:07,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:14:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:14:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 20:14:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:14:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 20:14:07,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 20:14:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:07,674 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 20:14:07,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:14:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 20:14:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:14:07,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:07,674 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:07,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:14:07,675 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-27 20:14:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974495847] [2020-10-27 20:14:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:14:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:09,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:09,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974495847] [2020-10-27 20:14:09,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:09,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:14:09,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26440392] [2020-10-27 20:14:09,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:14:09,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:14:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:14:09,303 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 20:14:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:11,305 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 20:14:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:14:11,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 20:14:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:11,311 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:14:11,311 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:14:11,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:14:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:14:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 20:14:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:14:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 20:14:11,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 20:14:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:11,319 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 20:14:11,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:14:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 20:14:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:14:11,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:11,320 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:11,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:14:11,320 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-27 20:14:11,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:11,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093517397] [2020-10-27 20:14:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:14:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:12,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:14:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:12,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:12,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:12,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:12,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:12,963 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 20:14:12,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093517397] [2020-10-27 20:14:12,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:12,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:14:12,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447847371] [2020-10-27 20:14:12,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:14:12,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:14:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:14:12,965 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 20:14:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:14,958 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 20:14:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:14:14,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 20:14:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:14,959 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:14:14,959 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:14:14,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:14:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:14:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 20:14:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:14:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 20:14:14,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 20:14:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:14,968 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 20:14:14,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:14:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 20:14:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:14:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:14,969 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:14,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:14:14,969 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-27 20:14:14,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:14,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879321714] [2020-10-27 20:14:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:15,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:14:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:14:15,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:16,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:16,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:16,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879321714] [2020-10-27 20:14:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:16,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:14:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572729771] [2020-10-27 20:14:16,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:14:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:14:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:14:16,791 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-27 20:14:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:19,164 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 20:14:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:14:19,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-27 20:14:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:19,165 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:14:19,165 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:14:19,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:14:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:14:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 20:14:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:14:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 20:14:19,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 20:14:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:19,175 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 20:14:19,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:14:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 20:14:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:14:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:19,175 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:19,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:14:19,176 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-27 20:14:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649733572] [2020-10-27 20:14:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:19,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:19,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:14:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:20,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:20,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:20,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:20,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:20,928 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 20:14:20,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649733572] [2020-10-27 20:14:20,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:20,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:14:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217088411] [2020-10-27 20:14:20,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:14:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:14:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:14:20,930 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-27 20:14:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:23,286 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 20:14:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:14:23,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 20:14:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:23,287 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:14:23,287 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:14:23,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:14:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:14:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 20:14:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:14:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 20:14:23,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 20:14:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:23,296 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 20:14:23,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:14:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 20:14:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:14:23,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:23,297 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:23,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:14:23,297 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-27 20:14:23,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:23,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263962674] [2020-10-27 20:14:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:14:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:14:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:24,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:24,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263962674] [2020-10-27 20:14:24,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:24,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:14:24,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338640114] [2020-10-27 20:14:24,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:14:24,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:14:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:14:24,998 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 20:14:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:27,481 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 20:14:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:14:27,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 20:14:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:27,483 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:14:27,483 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:14:27,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:14:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:14:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 20:14:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:14:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 20:14:27,492 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 20:14:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:27,493 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 20:14:27,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:14:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 20:14:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:14:27,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:27,493 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:27,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:14:27,494 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-27 20:14:27,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:27,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435991534] [2020-10-27 20:14:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:28,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:14:28,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:29,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:29,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:29,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:29,224 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 20:14:29,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435991534] [2020-10-27 20:14:29,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:29,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:14:29,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808508062] [2020-10-27 20:14:29,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:14:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:14:29,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:14:29,227 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 20:14:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:32,011 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 20:14:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:14:32,012 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 20:14:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:32,013 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:14:32,013 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:14:32,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:14:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:14:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 20:14:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:14:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 20:14:32,021 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 20:14:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:32,021 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 20:14:32,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:14:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 20:14:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:14:32,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:32,021 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:32,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:14:32,022 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-27 20:14:32,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:32,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809799743] [2020-10-27 20:14:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:14:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:14:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:34,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:34,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:34,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:34,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809799743] [2020-10-27 20:14:34,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:34,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:14:34,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307921535] [2020-10-27 20:14:34,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:14:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:14:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:14:34,102 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 20:14:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:36,924 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 20:14:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:14:36,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 20:14:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:36,925 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:14:36,925 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:14:36,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:14:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:14:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 20:14:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:14:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 20:14:36,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 20:14:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:36,941 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 20:14:36,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:14:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 20:14:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:14:36,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:36,942 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:36,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:14:36,942 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-27 20:14:36,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:36,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159382220] [2020-10-27 20:14:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:37,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:37,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:14:37,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:39,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:39,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:39,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:39,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:39,037 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 20:14:39,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159382220] [2020-10-27 20:14:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:14:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972912924] [2020-10-27 20:14:39,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:14:39,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:14:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:14:39,039 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-27 20:14:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:41,938 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 20:14:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:14:41,939 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-27 20:14:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:41,939 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:14:41,939 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:14:41,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:14:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:14:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 20:14:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:14:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 20:14:41,955 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 20:14:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:41,955 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 20:14:41,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:14:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 20:14:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:14:41,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:41,956 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:41,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:14:41,956 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-27 20:14:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:41,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983403984] [2020-10-27 20:14:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:14:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:14:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:44,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:44,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:44,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:44,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983403984] [2020-10-27 20:14:44,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:44,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:14:44,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639933715] [2020-10-27 20:14:44,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:14:44,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:14:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:14:44,280 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 20:14:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:47,555 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 20:14:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:14:47,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 20:14:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:47,557 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:14:47,557 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:14:47,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:14:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:14:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 20:14:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:14:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 20:14:47,565 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 20:14:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:47,565 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 20:14:47,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:14:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 20:14:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:14:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:47,566 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:47,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:14:47,566 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-27 20:14:47,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:47,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875905970] [2020-10-27 20:14:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:47,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:14:48,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:49,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:49,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:49,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:49,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:49,921 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 20:14:49,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875905970] [2020-10-27 20:14:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:14:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674837046] [2020-10-27 20:14:49,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:14:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:14:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:49,924 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-27 20:14:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:53,199 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 20:14:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:14:53,200 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-27 20:14:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:53,201 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:14:53,201 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:14:53,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:14:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:14:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 20:14:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:14:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 20:14:53,210 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 20:14:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:53,210 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 20:14:53,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:14:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 20:14:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:14:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:53,211 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:53,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:14:53,212 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-27 20:14:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:53,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72985286] [2020-10-27 20:14:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:53,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:14:54,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:55,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:55,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:55,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72985286] [2020-10-27 20:14:55,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:55,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:14:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134299646] [2020-10-27 20:14:55,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:14:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:14:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:14:55,951 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-27 20:14:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:59,261 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 20:14:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:14:59,261 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-27 20:14:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:59,262 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:14:59,262 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:14:59,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:14:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:14:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 20:14:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:14:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 20:14:59,270 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 20:14:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:59,271 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 20:14:59,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:14:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 20:14:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:14:59,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:59,271 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:59,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:14:59,272 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-27 20:14:59,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:59,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773003299] [2020-10-27 20:14:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:59,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:01,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:15:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:15:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:02,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:02,453 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 20:15:02,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773003299] [2020-10-27 20:15:02,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:02,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:15:02,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795223653] [2020-10-27 20:15:02,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:15:02,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:02,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:15:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:15:02,455 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-27 20:15:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:06,275 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 20:15:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:15:06,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 20:15:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:06,277 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:15:06,277 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:15:06,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:15:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:15:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 20:15:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:15:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 20:15:06,285 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 20:15:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:06,285 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 20:15:06,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:15:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 20:15:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:15:06,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:06,286 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:06,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:15:06,286 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-27 20:15:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:06,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664595929] [2020-10-27 20:15:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:15:07,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664595929] [2020-10-27 20:15:08,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:08,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:15:08,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249867456] [2020-10-27 20:15:08,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:15:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:08,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:15:08,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:15:08,829 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 20:15:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:12,582 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 20:15:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:15:12,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 20:15:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:12,584 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:15:12,584 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:15:12,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:15:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:15:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 20:15:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:15:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 20:15:12,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 20:15:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:12,591 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 20:15:12,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:15:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 20:15:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:15:12,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:12,592 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:12,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:15:12,592 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-27 20:15:12,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:12,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994139847] [2020-10-27 20:15:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:13,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:13,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:15:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:15,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:15,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:15,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:15,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:15,107 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 20:15:15,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994139847] [2020-10-27 20:15:15,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:15,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:15:15,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982710715] [2020-10-27 20:15:15,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:15:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:15:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:15:15,108 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 20:15:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:19,203 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 20:15:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:15:19,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 20:15:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:19,204 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:15:19,204 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:15:19,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:15:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:15:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 20:15:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:15:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 20:15:19,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 20:15:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:19,213 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 20:15:19,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:15:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 20:15:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:15:19,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:19,214 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:19,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:15:19,214 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-27 20:15:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:19,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076230848] [2020-10-27 20:15:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:19,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:15:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:22,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:22,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076230848] [2020-10-27 20:15:22,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:22,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:15:22,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092564405] [2020-10-27 20:15:22,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:15:22,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:15:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:15:22,523 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 20:15:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:26,631 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 20:15:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:15:26,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 20:15:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:26,633 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:15:26,633 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:15:26,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:15:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:15:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 20:15:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:15:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 20:15:26,643 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 20:15:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:26,643 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 20:15:26,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:15:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 20:15:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:15:26,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:26,644 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:26,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:15:26,644 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-27 20:15:26,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:26,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740399891] [2020-10-27 20:15:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:15:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:30,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:30,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:30,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:30,178 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 20:15:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740399891] [2020-10-27 20:15:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:15:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970420333] [2020-10-27 20:15:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:15:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:15:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:15:30,180 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-27 20:15:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:34,387 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 20:15:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:15:34,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 20:15:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:34,389 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:15:34,389 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:15:34,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:15:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:15:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 20:15:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:15:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 20:15:34,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 20:15:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:34,398 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 20:15:34,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:15:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 20:15:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:15:34,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:34,399 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:34,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:15:34,400 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:34,400 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-27 20:15:34,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:34,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875605130] [2020-10-27 20:15:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:35,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:15:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:37,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:37,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:37,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:37,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:37,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875605130] [2020-10-27 20:15:37,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:37,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:15:37,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234713538] [2020-10-27 20:15:37,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:15:37,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:15:37,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:15:37,458 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 20:15:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:42,106 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 20:15:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:15:42,107 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 20:15:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:42,108 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:15:42,108 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:15:42,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:15:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:15:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 20:15:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:15:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 20:15:42,115 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 20:15:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:42,115 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 20:15:42,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:15:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 20:15:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:15:42,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:42,116 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:42,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:15:42,116 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-27 20:15:42,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:42,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857702435] [2020-10-27 20:15:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:44,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:15:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:45,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:45,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:45,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:45,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:15:45,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:45,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:45,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:45,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:45,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:45,920 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 20:15:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857702435] [2020-10-27 20:15:45,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:45,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:15:45,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788437284] [2020-10-27 20:15:45,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:15:45,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:15:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:15:45,921 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-27 20:15:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:50,671 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 20:15:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:15:50,672 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-27 20:15:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:50,673 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:15:50,673 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:15:50,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:15:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:15:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 20:15:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:15:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 20:15:50,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 20:15:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 20:15:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:15:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 20:15:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:15:50,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:50,682 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:50,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:15:50,683 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:50,683 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-27 20:15:50,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:50,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140711822] [2020-10-27 20:15:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:52,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:15:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:54,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:54,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:54,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140711822] [2020-10-27 20:15:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:54,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:15:54,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74182244] [2020-10-27 20:15:54,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:15:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:15:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:15:54,566 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 20:15:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:59,717 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 20:15:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:15:59,718 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 20:15:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:59,718 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:15:59,719 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 20:15:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:15:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 20:15:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 20:15:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:15:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 20:15:59,728 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 20:15:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:59,728 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 20:15:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:15:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 20:15:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:15:59,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:59,729 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:59,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:15:59,729 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-27 20:15:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:59,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106373560] [2020-10-27 20:15:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:01,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:01,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2188 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:16:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:03,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:03,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:03,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:03,882 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 20:16:03,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106373560] [2020-10-27 20:16:03,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:03,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:16:03,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649082718] [2020-10-27 20:16:03,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:16:03,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:03,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:16:03,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:16:03,883 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-27 20:16:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:08,919 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 20:16:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:16:08,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 20:16:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:08,921 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:16:08,921 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:16:08,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:16:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:16:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 20:16:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:16:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 20:16:08,930 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 20:16:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:08,931 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 20:16:08,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:16:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 20:16:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:16:08,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:08,931 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:08,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:16:08,932 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-27 20:16:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:08,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335223065] [2020-10-27 20:16:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:11,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:11,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2064 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:16:11,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:13,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:13,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:13,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:16:13,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335223065] [2020-10-27 20:16:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:13,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:16:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517229768] [2020-10-27 20:16:13,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:16:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:16:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:16:13,188 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-27 20:16:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:19,063 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 20:16:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:16:19,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-27 20:16:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:19,065 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:16:19,065 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:16:19,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:16:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:16:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 20:16:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:16:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 20:16:19,074 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 20:16:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:19,074 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 20:16:19,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:16:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 20:16:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:16:19,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:19,074 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:19,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:16:19,075 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-27 20:16:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:19,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670797581] [2020-10-27 20:16:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:21,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2757 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:16:21,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:24,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:24,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:24,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:24,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:16:24,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:24,132 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 20:16:24,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670797581] [2020-10-27 20:16:24,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:24,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:16:24,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699414430] [2020-10-27 20:16:24,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:16:24,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:24,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:16:24,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:16:24,134 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 20:16:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:30,211 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 20:16:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:16:30,212 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 20:16:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:30,213 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:16:30,213 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:16:30,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:16:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:16:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 20:16:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:16:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 20:16:30,221 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 20:16:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:30,221 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 20:16:30,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:16:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 20:16:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:16:30,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:30,222 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:30,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:16:30,222 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-27 20:16:30,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:30,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951577192] [2020-10-27 20:16:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:30,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:32,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2490 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:16:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:35,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:35,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:35,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:35,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:16:35,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951577192] [2020-10-27 20:16:35,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:35,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:16:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956493399] [2020-10-27 20:16:35,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:16:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:16:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:16:35,097 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-27 20:16:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:41,242 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 20:16:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:16:41,243 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-27 20:16:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:41,244 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:16:41,245 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 20:16:41,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:16:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 20:16:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 20:16:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:16:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 20:16:41,253 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 20:16:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:41,254 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 20:16:41,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:16:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 20:16:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:16:41,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:41,254 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:41,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:16:41,255 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-27 20:16:41,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:41,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834089134] [2020-10-27 20:16:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:41,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:43,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:43,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2472 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:16:43,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:46,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:46,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:46,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:46,193 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 20:16:46,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834089134] [2020-10-27 20:16:46,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:46,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:16:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161129290] [2020-10-27 20:16:46,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:16:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:16:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:16:46,195 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 51 states. [2020-10-27 20:16:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:16:52,694 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-27 20:16:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:16:52,694 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-27 20:16:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:16:52,695 INFO L225 Difference]: With dead ends: 67 [2020-10-27 20:16:52,696 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:16:52,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:16:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:16:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 20:16:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:16:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 20:16:52,703 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-27 20:16:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:16:52,703 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 20:16:52,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:16:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 20:16:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:16:52,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:16:52,704 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:16:52,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:16:52,705 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:16:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:16:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -684175657, now seen corresponding path program 48 times [2020-10-27 20:16:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:16:52,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324822218] [2020-10-27 20:16:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:16:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:52,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:55,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:55,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2967 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:16:55,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:58,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:16:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:16:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:16:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:16:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:16:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:16:58,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324822218] [2020-10-27 20:16:58,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:16:58,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:16:58,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268352195] [2020-10-27 20:16:58,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:16:58,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:16:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:16:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:16:58,234 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-27 20:17:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:17:04,814 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 20:17:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:17:04,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-27 20:17:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:17:04,816 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:17:04,816 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:17:04,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:17:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:17:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 20:17:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:17:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 20:17:04,826 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-27 20:17:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:17:04,827 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 20:17:04,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:17:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 20:17:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:17:04,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:17:04,827 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:17:04,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:17:04,828 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:17:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:17:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1395679230, now seen corresponding path program 49 times [2020-10-27 20:17:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:17:04,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910865749] [2020-10-27 20:17:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:17:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:17:04,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:17:07,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:17:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:17:09,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:17:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:17:09,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:17:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:17:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:17:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:17:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:17:09,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:17:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:17:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:17:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:17:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:17:09,721 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 20:17:09,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910865749] [2020-10-27 20:17:09,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:17:09,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:17:09,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70735615] [2020-10-27 20:17:09,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:17:09,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:17:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:17:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:17:09,722 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 53 states. [2020-10-27 20:17:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:17:16,670 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-27 20:17:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:17:16,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-27 20:17:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:17:16,673 INFO L225 Difference]: With dead ends: 69 [2020-10-27 20:17:16,673 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:17:16,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:17:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:17:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 20:17:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:17:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-27 20:17:16,683 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-27 20:17:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:17:16,683 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-27 20:17:16,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:17:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-27 20:17:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:17:16,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:17:16,684 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:17:16,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:17:16,684 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:17:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:17:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1446671287, now seen corresponding path program 50 times [2020-10-27 20:17:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:17:16,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248364563] [2020-10-27 20:17:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:17:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:17:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:17:20,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4163 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:17:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0