/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:59:16,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:59:16,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:59:16,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:59:16,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:59:16,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:59:16,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:59:16,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:59:16,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:59:16,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:59:16,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:59:16,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:59:16,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:59:16,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:59:16,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:59:16,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:59:16,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:59:16,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:59:16,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:59:16,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:59:16,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:59:16,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:59:16,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:59:16,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:59:16,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:59:16,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:59:16,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:59:16,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:59:16,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:59:16,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:59:16,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:59:16,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:59:16,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:59:16,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:59:16,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:59:16,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:59:16,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:59:16,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:59:16,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:59:16,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:59:16,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:59:16,142 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 00:59:16,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:59:16,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:59:16,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:59:16,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:59:16,172 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:59:16,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:59:16,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:59:16,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:59:16,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:59:16,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:59:16,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:59:16,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:59:16,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:59:16,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:59:16,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:59:16,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:59:16,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:59:16,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:59:16,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:59:16,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:59:16,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:59:16,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:59:16,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:59:16,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:59:16,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:59:16,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:59:16,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:59:16,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:59:16,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:59:16,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:59:16,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:59:16,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:59:16,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:59:16,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:59:16,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:59:16,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-27 00:59:16,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98f8e74a/67599e8d584e4da5a4689e0b0ff7ef2c/FLAG57f94bc73 [2020-10-27 00:59:17,369 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:59:17,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-27 00:59:17,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98f8e74a/67599e8d584e4da5a4689e0b0ff7ef2c/FLAG57f94bc73 [2020-10-27 00:59:17,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98f8e74a/67599e8d584e4da5a4689e0b0ff7ef2c [2020-10-27 00:59:17,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:59:17,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:59:17,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:59:17,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:59:17,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:59:17,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:59:17" (1/1) ... [2020-10-27 00:59:17,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1732d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:17, skipping insertion in model container [2020-10-27 00:59:17,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:59:17" (1/1) ... [2020-10-27 00:59:17,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:59:17,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:59:18,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:59:18,083 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:59:18,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:59:18,114 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:59:18,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18 WrapperNode [2020-10-27 00:59:18,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:59:18,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:59:18,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:59:18,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:59:18,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (1/1) ... [2020-10-27 00:59:18,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:59:18,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:59:18,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:59:18,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:59:18,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (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 00:59:18,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:59:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:59:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:59:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 00:59:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:59:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:59:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:59:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:59:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:59:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 00:59:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:59:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:59:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:59:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:59:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:59:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:59:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:59:18,470 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:59:18,471 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:59:18,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:59:18 BoogieIcfgContainer [2020-10-27 00:59:18,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:59:18,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:59:18,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:59:18,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:59:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:59:17" (1/3) ... [2020-10-27 00:59:18,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31994586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:59:18, skipping insertion in model container [2020-10-27 00:59:18,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:59:18" (2/3) ... [2020-10-27 00:59:18,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31994586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:59:18, skipping insertion in model container [2020-10-27 00:59:18,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:59:18" (3/3) ... [2020-10-27 00:59:18,481 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-10-27 00:59:18,493 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:59:18,497 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:59:18,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:59:18,537 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:59:18,538 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:59:18,538 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:59:18,538 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:59:18,538 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:59:18,538 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:59:18,538 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:59:18,539 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:59:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 00:59:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 00:59:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:18,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:18,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 943003376, now seen corresponding path program 1 times [2020-10-27 00:59:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195769689] [2020-10-27 00:59:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:18,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:18,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 00:59:18,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 00:59:18,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:18,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 00:59:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:59:19,134 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-27 00:59:19,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:19,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:19,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:19,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:19,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:59:19,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:19,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:19,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:59:19,213 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 00:59:19,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195769689] [2020-10-27 00:59:19,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:59:19,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:59:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766317339] [2020-10-27 00:59:19,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 00:59:19,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:19,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 00:59:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 00:59:19,242 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 00:59:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:19,306 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-27 00:59:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 00:59:19,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 00:59:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:19,315 INFO L225 Difference]: With dead ends: 37 [2020-10-27 00:59:19,316 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 00:59:19,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 00:59:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 00:59:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 00:59:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 00:59:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 00:59:19,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 00:59:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:19,360 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 00:59:19,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 00:59:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 00:59:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 00:59:19,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:19,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:19,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:59:19,362 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash 771228470, now seen corresponding path program 1 times [2020-10-27 00:59:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:19,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180016919] [2020-10-27 00:59:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:19,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:19,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 00:59:19,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 00:59:19,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:59:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:59:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:59:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:19,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:19,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:19,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:19,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:59:19,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:19,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:19,561 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 00:59:19,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180016919] [2020-10-27 00:59:19,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:59:19,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:59:19,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559924244] [2020-10-27 00:59:19,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:59:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:59:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:59:19,566 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-27 00:59:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:19,646 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 00:59:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 00:59:19,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 00:59:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:19,648 INFO L225 Difference]: With dead ends: 22 [2020-10-27 00:59:19,648 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 00:59:19,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:59:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 00:59:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-27 00:59:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 00:59:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 00:59:19,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-27 00:59:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:19,658 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 00:59:19,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:59:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 00:59:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 00:59:19,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:19,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:19,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:59:19,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1042690312, now seen corresponding path program 1 times [2020-10-27 00:59:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:19,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075368200] [2020-10-27 00:59:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:19,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:19,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 00:59:19,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:19,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 00:59:19,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 00:59:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 00:59:19,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:19,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:19,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:19,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:19,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:19,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:59:19,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:19,811 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 00:59:19,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075368200] [2020-10-27 00:59:19,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:19,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:59:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107561491] [2020-10-27 00:59:19,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:59:19,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:59:19,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:59:19,814 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-27 00:59:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:19,939 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 00:59:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:59:19,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 00:59:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:19,941 INFO L225 Difference]: With dead ends: 24 [2020-10-27 00:59:19,941 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 00:59:19,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:59:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 00:59:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 00:59:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 00:59:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 00:59:19,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-27 00:59:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:19,949 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 00:59:19,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:59:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 00:59:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 00:59:19,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:19,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:19,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:59:19,951 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash -461917638, now seen corresponding path program 2 times [2020-10-27 00:59:19,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:19,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139827810] [2020-10-27 00:59:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 00:59:20,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 00:59:20,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:59:20,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:20,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 00:59:20,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:20,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:59:20,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:20,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:20,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139827810] [2020-10-27 00:59:20,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:20,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:59:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204490267] [2020-10-27 00:59:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:59:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:59:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:59:20,227 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-27 00:59:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:20,376 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 00:59:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:59:20,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 00:59:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:20,378 INFO L225 Difference]: With dead ends: 26 [2020-10-27 00:59:20,378 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 00:59:20,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:59:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 00:59:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-27 00:59:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 00:59:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 00:59:20,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-27 00:59:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:20,386 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 00:59:20,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:59:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 00:59:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 00:59:20,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:20,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:20,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:59:20,388 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -685126404, now seen corresponding path program 3 times [2020-10-27 00:59:20,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:20,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483174811] [2020-10-27 00:59:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 00:59:20,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 00:59:20,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:59:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 00:59:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:20,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:20,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:20,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483174811] [2020-10-27 00:59:20,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:20,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:59:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839228362] [2020-10-27 00:59:20,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:59:20,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:59:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:59:20,588 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-27 00:59:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:20,762 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 00:59:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:59:20,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 00:59:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:20,764 INFO L225 Difference]: With dead ends: 28 [2020-10-27 00:59:20,764 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 00:59:20,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:59:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 00:59:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 00:59:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 00:59:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 00:59:20,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-27 00:59:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:20,772 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 00:59:20,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:59:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 00:59:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 00:59:20,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:20,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:20,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:59:20,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -440385730, now seen corresponding path program 4 times [2020-10-27 00:59:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:20,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739215372] [2020-10-27 00:59:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:20,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 00:59:20,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 00:59:20,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:59:20,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:20,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 00:59:20,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:20,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:20,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:20,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739215372] [2020-10-27 00:59:20,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:20,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:59:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837597142] [2020-10-27 00:59:20,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:59:20,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:59:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:59:20,975 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-27 00:59:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:21,171 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 00:59:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:59:21,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 00:59:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:21,173 INFO L225 Difference]: With dead ends: 30 [2020-10-27 00:59:21,173 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 00:59:21,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:59:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 00:59:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 00:59:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 00:59:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 00:59:21,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-27 00:59:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:21,180 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 00:59:21,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:59:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 00:59:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 00:59:21,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:21,181 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:21,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:59:21,182 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1467799296, now seen corresponding path program 5 times [2020-10-27 00:59:21,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:21,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235862302] [2020-10-27 00:59:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:21,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:21,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 00:59:21,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 00:59:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:21,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:21,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:21,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:21,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:21,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:21,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235862302] [2020-10-27 00:59:21,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:21,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:59:21,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044766275] [2020-10-27 00:59:21,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:59:21,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:59:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:59:21,396 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-27 00:59:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:21,643 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 00:59:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:59:21,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 00:59:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:21,645 INFO L225 Difference]: With dead ends: 32 [2020-10-27 00:59:21,645 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 00:59:21,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:59:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 00:59:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 00:59:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 00:59:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 00:59:21,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-27 00:59:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:21,652 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 00:59:21,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:59:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 00:59:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 00:59:21,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:21,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:21,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:59:21,653 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -969758142, now seen corresponding path program 6 times [2020-10-27 00:59:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:21,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148811089] [2020-10-27 00:59:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:59:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 00:59:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:21,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:21,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:21,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:21,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:21,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:21,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:21,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:21,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:21,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:21,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:21,856 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 00:59:21,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148811089] [2020-10-27 00:59:21,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:21,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:59:21,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610672024] [2020-10-27 00:59:21,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:59:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:59:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:59:21,859 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-27 00:59:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:22,163 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 00:59:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:59:22,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 00:59:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:22,165 INFO L225 Difference]: With dead ends: 34 [2020-10-27 00:59:22,165 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 00:59:22,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:59:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 00:59:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 00:59:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 00:59:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 00:59:22,172 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-27 00:59:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:22,172 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 00:59:22,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:59:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 00:59:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 00:59:22,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:22,174 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:22,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:59:22,174 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash 906420996, now seen corresponding path program 7 times [2020-10-27 00:59:22,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:22,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413668578] [2020-10-27 00:59:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:22,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:22,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:22,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 00:59:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:22,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:22,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:22,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:22,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:22,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413668578] [2020-10-27 00:59:22,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:22,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 00:59:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080849241] [2020-10-27 00:59:22,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 00:59:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 00:59:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:59:22,553 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-27 00:59:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:22,974 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 00:59:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:59:22,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 00:59:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:22,976 INFO L225 Difference]: With dead ends: 36 [2020-10-27 00:59:22,976 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 00:59:22,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 00:59:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 00:59:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 00:59:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 00:59:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 00:59:22,992 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-27 00:59:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:22,993 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 00:59:22,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 00:59:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 00:59:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 00:59:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:22,995 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:22,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:59:22,995 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash 28308294, now seen corresponding path program 8 times [2020-10-27 00:59:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:22,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150957575] [2020-10-27 00:59:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:23,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:23,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 00:59:23,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 00:59:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:23,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:23,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:23,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:23,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:23,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:23,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:59:23,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150957575] [2020-10-27 00:59:23,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:23,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 00:59:23,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429603433] [2020-10-27 00:59:23,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 00:59:23,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 00:59:23,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:59:23,363 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-27 00:59:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:23,826 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 00:59:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:59:23,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 00:59:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:23,827 INFO L225 Difference]: With dead ends: 38 [2020-10-27 00:59:23,827 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 00:59:23,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:59:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 00:59:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 00:59:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 00:59:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 00:59:23,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-27 00:59:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:23,835 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 00:59:23,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 00:59:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 00:59:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 00:59:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:23,836 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:23,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 00:59:23,837 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2024408312, now seen corresponding path program 9 times [2020-10-27 00:59:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:23,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024145931] [2020-10-27 00:59:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:23,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 00:59:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:24,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:24,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:24,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024145931] [2020-10-27 00:59:24,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:24,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 00:59:24,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771350334] [2020-10-27 00:59:24,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 00:59:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:24,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 00:59:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:59:24,142 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-27 00:59:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:24,670 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 00:59:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:59:24,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 00:59:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:24,673 INFO L225 Difference]: With dead ends: 40 [2020-10-27 00:59:24,673 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 00:59:24,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:59:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 00:59:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 00:59:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 00:59:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 00:59:24,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-27 00:59:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:24,681 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 00:59:24,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 00:59:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 00:59:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 00:59:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:24,682 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 00:59:24,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 999889482, now seen corresponding path program 10 times [2020-10-27 00:59:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217755471] [2020-10-27 00:59:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:24,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:24,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 00:59:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:25,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:25,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:25,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217755471] [2020-10-27 00:59:25,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:25,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 00:59:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366169374] [2020-10-27 00:59:25,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 00:59:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 00:59:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:59:25,039 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-27 00:59:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:25,631 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 00:59:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 00:59:25,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 00:59:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:25,633 INFO L225 Difference]: With dead ends: 42 [2020-10-27 00:59:25,633 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 00:59:25,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 00:59:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 00:59:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 00:59:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 00:59:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 00:59:25,641 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-27 00:59:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:25,642 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 00:59:25,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 00:59:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 00:59:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 00:59:25,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:25,643 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:25,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 00:59:25,643 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash -342789876, now seen corresponding path program 11 times [2020-10-27 00:59:25,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:25,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481386665] [2020-10-27 00:59:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:25,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 00:59:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:26,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:26,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:26,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:26,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:59:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:26,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481386665] [2020-10-27 00:59:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:26,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 00:59:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179086891] [2020-10-27 00:59:26,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 00:59:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 00:59:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:59:26,027 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-27 00:59:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:26,601 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 00:59:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 00:59:26,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 00:59:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:26,602 INFO L225 Difference]: With dead ends: 44 [2020-10-27 00:59:26,602 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 00:59:26,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 00:59:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 00:59:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 00:59:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 00:59:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 00:59:26,616 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-27 00:59:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:26,617 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 00:59:26,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 00:59:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 00:59:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 00:59:26,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:26,619 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:26,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 00:59:26,619 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2127503182, now seen corresponding path program 12 times [2020-10-27 00:59:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:26,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853883054] [2020-10-27 00:59:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:26,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:26,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 00:59:26,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:26,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 00:59:26,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 00:59:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 00:59:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:27,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:27,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:27,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:27,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:27,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853883054] [2020-10-27 00:59:27,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:27,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 00:59:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465295300] [2020-10-27 00:59:27,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 00:59:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 00:59:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 00:59:27,151 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-27 00:59:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:27,847 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 00:59:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:59:27,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 00:59:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:27,848 INFO L225 Difference]: With dead ends: 46 [2020-10-27 00:59:27,848 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 00:59:27,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 00:59:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 00:59:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 00:59:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 00:59:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 00:59:27,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-27 00:59:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:27,863 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 00:59:27,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 00:59:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 00:59:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 00:59:27,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:27,868 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:27,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 00:59:27,868 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash 962217232, now seen corresponding path program 13 times [2020-10-27 00:59:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:27,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878920261] [2020-10-27 00:59:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:28,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 00:59:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:28,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 00:59:28,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:28,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 00:59:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 00:59:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:28,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:28,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:28,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878920261] [2020-10-27 00:59:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:28,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 00:59:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39622553] [2020-10-27 00:59:28,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 00:59:28,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 00:59:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:59:28,402 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-27 00:59:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:29,051 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 00:59:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:59:29,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 00:59:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:29,052 INFO L225 Difference]: With dead ends: 48 [2020-10-27 00:59:29,052 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 00:59:29,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 00:59:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 00:59:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 00:59:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 00:59:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 00:59:29,061 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-27 00:59:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:29,061 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 00:59:29,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 00:59:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 00:59:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 00:59:29,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:29,062 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:29,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 00:59:29,063 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2108883538, now seen corresponding path program 14 times [2020-10-27 00:59:29,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:29,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265472438] [2020-10-27 00:59:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:29,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:29,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 00:59:29,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 00:59:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:29,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:29,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:29,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:29,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:29,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265472438] [2020-10-27 00:59:29,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:29,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 00:59:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416443689] [2020-10-27 00:59:29,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 00:59:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 00:59:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 00:59:29,620 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-27 00:59:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:30,312 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 00:59:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 00:59:30,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 00:59:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:30,316 INFO L225 Difference]: With dead ends: 50 [2020-10-27 00:59:30,316 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 00:59:30,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 00:59:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 00:59:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 00:59:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 00:59:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 00:59:30,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-27 00:59:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:30,325 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 00:59:30,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 00:59:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 00:59:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 00:59:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:30,326 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:30,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 00:59:30,326 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 248608532, now seen corresponding path program 15 times [2020-10-27 00:59:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:30,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740620890] [2020-10-27 00:59:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:30,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 00:59:30,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:30,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:30,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:30,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:30,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:30,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:30,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:30,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:30,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740620890] [2020-10-27 00:59:30,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 00:59:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696280380] [2020-10-27 00:59:30,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 00:59:30,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 00:59:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 00:59:30,894 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-27 00:59:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:31,705 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 00:59:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 00:59:31,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 00:59:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:31,706 INFO L225 Difference]: With dead ends: 52 [2020-10-27 00:59:31,706 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 00:59:31,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 00:59:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 00:59:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 00:59:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 00:59:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 00:59:31,719 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-27 00:59:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:31,720 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 00:59:31,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 00:59:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 00:59:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 00:59:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:31,723 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:31,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 00:59:31,724 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -769277098, now seen corresponding path program 16 times [2020-10-27 00:59:31,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:31,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757885725] [2020-10-27 00:59:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:32,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 00:59:32,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-27 00:59:32,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 00:59:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 00:59:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:32,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:32,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:32,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:32,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757885725] [2020-10-27 00:59:32,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 00:59:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690341095] [2020-10-27 00:59:32,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 00:59:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 00:59:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 00:59:32,354 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-27 00:59:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:33,318 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 00:59:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:59:33,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 00:59:33,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:33,320 INFO L225 Difference]: With dead ends: 54 [2020-10-27 00:59:33,320 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 00:59:33,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 00:59:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 00:59:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 00:59:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 00:59:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 00:59:33,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-27 00:59:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:33,330 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 00:59:33,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 00:59:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 00:59:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 00:59:33,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:33,331 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:33,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 00:59:33,331 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash 295175960, now seen corresponding path program 17 times [2020-10-27 00:59:33,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:33,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852316851] [2020-10-27 00:59:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:33,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:33,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:33,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 00:59:33,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-27 00:59:33,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 00:59:33,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:33,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 00:59:33,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:33,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:33,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:33,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:33,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:33,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:59:33,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:33,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:33,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:33,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:33,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:33,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852316851] [2020-10-27 00:59:33,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:33,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 00:59:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338826095] [2020-10-27 00:59:33,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 00:59:33,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 00:59:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:59:33,923 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-27 00:59:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:34,874 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 00:59:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 00:59:34,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 00:59:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:34,876 INFO L225 Difference]: With dead ends: 56 [2020-10-27 00:59:34,876 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 00:59:34,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 00:59:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 00:59:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 00:59:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 00:59:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 00:59:34,886 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-27 00:59:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:34,886 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 00:59:34,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 00:59:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 00:59:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 00:59:34,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:34,887 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:34,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 00:59:34,887 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1032348250, now seen corresponding path program 18 times [2020-10-27 00:59:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:34,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039268650] [2020-10-27 00:59:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:35,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:35,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 00:59:35,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:35,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 00:59:35,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 00:59:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 00:59:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:35,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:35,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:35,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:35,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039268650] [2020-10-27 00:59:35,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:35,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 00:59:35,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069060060] [2020-10-27 00:59:35,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 00:59:35,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:35,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 00:59:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 00:59:35,523 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-27 00:59:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:36,521 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 00:59:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 00:59:36,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 00:59:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:36,522 INFO L225 Difference]: With dead ends: 58 [2020-10-27 00:59:36,522 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 00:59:36,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 00:59:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 00:59:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 00:59:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 00:59:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 00:59:36,531 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-27 00:59:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:36,531 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 00:59:36,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 00:59:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 00:59:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 00:59:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:36,532 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:36,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 00:59:36,533 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 785315100, now seen corresponding path program 19 times [2020-10-27 00:59:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:36,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717638579] [2020-10-27 00:59:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:36,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:36,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 00:59:36,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:37,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:37,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:37,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:37,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717638579] [2020-10-27 00:59:37,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:37,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 00:59:37,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826505879] [2020-10-27 00:59:37,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 00:59:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 00:59:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:59:37,315 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-27 00:59:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:38,408 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 00:59:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 00:59:38,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 00:59:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:38,409 INFO L225 Difference]: With dead ends: 60 [2020-10-27 00:59:38,409 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 00:59:38,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 00:59:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 00:59:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 00:59:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 00:59:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 00:59:38,418 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-27 00:59:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:38,418 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 00:59:38,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 00:59:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 00:59:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 00:59:38,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:38,419 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:38,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 00:59:38,419 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -390340770, now seen corresponding path program 20 times [2020-10-27 00:59:38,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:38,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890832639] [2020-10-27 00:59:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:38,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 00:59:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:39,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:39,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:39,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:39,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:39,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:39,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:39,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:39,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890832639] [2020-10-27 00:59:39,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:39,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 00:59:39,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775847665] [2020-10-27 00:59:39,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 00:59:39,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:39,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 00:59:39,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 00:59:39,290 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-27 00:59:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:40,453 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 00:59:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 00:59:40,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 00:59:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:40,455 INFO L225 Difference]: With dead ends: 62 [2020-10-27 00:59:40,455 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 00:59:40,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 00:59:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 00:59:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 00:59:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 00:59:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 00:59:40,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-27 00:59:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:40,464 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 00:59:40,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 00:59:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 00:59:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 00:59:40,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:40,465 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:40,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 00:59:40,465 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -619232992, now seen corresponding path program 21 times [2020-10-27 00:59:40,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:40,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784348676] [2020-10-27 00:59:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:40,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:40,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 00:59:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:41,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:41,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:41,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:41,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:41,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:41,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784348676] [2020-10-27 00:59:41,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:41,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 00:59:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815072357] [2020-10-27 00:59:41,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 00:59:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 00:59:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 00:59:41,243 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-27 00:59:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:42,508 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 00:59:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 00:59:42,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 00:59:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:42,510 INFO L225 Difference]: With dead ends: 64 [2020-10-27 00:59:42,510 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 00:59:42,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 00:59:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 00:59:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 00:59:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 00:59:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 00:59:42,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-27 00:59:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:42,519 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 00:59:42,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 00:59:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 00:59:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 00:59:42,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:42,520 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:42,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 00:59:42,520 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1541326238, now seen corresponding path program 22 times [2020-10-27 00:59:42,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:42,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583873168] [2020-10-27 00:59:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:42,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:42,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 00:59:42,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-27 00:59:42,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 00:59:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 00:59:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:43,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:43,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:43,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:43,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:43,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:43,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583873168] [2020-10-27 00:59:43,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:43,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 00:59:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366403817] [2020-10-27 00:59:43,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 00:59:43,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 00:59:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:59:43,396 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-27 00:59:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:44,706 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 00:59:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 00:59:44,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 00:59:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:44,707 INFO L225 Difference]: With dead ends: 66 [2020-10-27 00:59:44,708 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 00:59:44,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 00:59:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 00:59:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-27 00:59:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 00:59:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 00:59:44,716 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-27 00:59:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:44,717 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 00:59:44,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 00:59:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 00:59:44,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 00:59:44,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:44,717 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:44,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 00:59:44,718 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1385294628, now seen corresponding path program 23 times [2020-10-27 00:59:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:44,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597876277] [2020-10-27 00:59:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:44,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:45,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 00:59:45,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:45,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:45,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:45,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597876277] [2020-10-27 00:59:45,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:45,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 00:59:45,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337437126] [2020-10-27 00:59:45,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 00:59:45,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 00:59:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 00:59:45,587 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-27 00:59:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:47,015 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 00:59:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 00:59:47,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 00:59:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:47,017 INFO L225 Difference]: With dead ends: 68 [2020-10-27 00:59:47,017 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 00:59:47,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 00:59:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 00:59:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 00:59:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 00:59:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 00:59:47,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-27 00:59:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:47,027 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 00:59:47,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 00:59:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 00:59:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 00:59:47,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:47,028 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:47,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 00:59:47,028 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash 664367974, now seen corresponding path program 24 times [2020-10-27 00:59:47,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:47,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059935188] [2020-10-27 00:59:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:47,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:47,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:59:47,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 00:59:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:48,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:48,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:48,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059935188] [2020-10-27 00:59:48,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:48,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 00:59:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839071694] [2020-10-27 00:59:48,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 00:59:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:48,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 00:59:48,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 00:59:48,029 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-27 00:59:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:49,482 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 00:59:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 00:59:49,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 00:59:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:49,484 INFO L225 Difference]: With dead ends: 70 [2020-10-27 00:59:49,484 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 00:59:49,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 00:59:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 00:59:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-27 00:59:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 00:59:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-27 00:59:49,491 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-27 00:59:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:49,492 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-27 00:59:49,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 00:59:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-27 00:59:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 00:59:49,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:49,493 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:49,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 00:59:49,493 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash -656411864, now seen corresponding path program 25 times [2020-10-27 00:59:49,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:49,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113150539] [2020-10-27 00:59:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:49,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:49,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:59:49,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-27 00:59:49,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 00:59:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 00:59:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:50,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:50,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:50,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:50,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:50,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113150539] [2020-10-27 00:59:50,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:50,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 00:59:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782657350] [2020-10-27 00:59:50,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 00:59:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 00:59:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 00:59:50,641 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-27 00:59:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:52,226 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 00:59:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 00:59:52,226 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 00:59:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:52,227 INFO L225 Difference]: With dead ends: 72 [2020-10-27 00:59:52,227 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 00:59:52,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 00:59:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 00:59:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 00:59:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 00:59:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-27 00:59:52,235 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-27 00:59:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:52,235 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-27 00:59:52,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 00:59:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-27 00:59:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 00:59:52,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:52,236 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:52,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 00:59:52,237 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1384483434, now seen corresponding path program 26 times [2020-10-27 00:59:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:52,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435318198] [2020-10-27 00:59:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:52,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:52,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 00:59:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:53,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:53,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:53,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:53,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435318198] [2020-10-27 00:59:53,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 00:59:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202546549] [2020-10-27 00:59:53,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 00:59:53,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 00:59:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 00:59:53,304 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-27 00:59:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:55,009 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 00:59:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 00:59:55,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 00:59:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:55,011 INFO L225 Difference]: With dead ends: 74 [2020-10-27 00:59:55,011 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 00:59:55,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 00:59:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 00:59:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 00:59:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 00:59:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-27 00:59:55,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-27 00:59:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:55,018 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-27 00:59:55,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 00:59:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-27 00:59:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 00:59:55,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:55,019 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:55,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 00:59:55,019 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash -115189460, now seen corresponding path program 27 times [2020-10-27 00:59:55,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:55,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087116191] [2020-10-27 00:59:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:55,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:55,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:55,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:59:55,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:55,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-27 00:59:55,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:55,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 00:59:55,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:55,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 00:59:55,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:56,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:56,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:56,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:56,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:56,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:56,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:59:56,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:56,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:56,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087116191] [2020-10-27 00:59:56,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:56,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 00:59:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948500604] [2020-10-27 00:59:56,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 00:59:56,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 00:59:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 00:59:56,189 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-27 00:59:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:57,829 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 00:59:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 00:59:57,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 00:59:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:57,830 INFO L225 Difference]: With dead ends: 76 [2020-10-27 00:59:57,831 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 00:59:57,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 00:59:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 00:59:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 00:59:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 00:59:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-27 00:59:57,839 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-27 00:59:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:57,839 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-27 00:59:57,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 00:59:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-27 00:59:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 00:59:57,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:57,840 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:57,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 00:59:57,840 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1808170862, now seen corresponding path program 28 times [2020-10-27 00:59:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:57,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063340765] [2020-10-27 00:59:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:58,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:58,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:59:58,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:58,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-27 00:59:58,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:58,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 00:59:58,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:59:58,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 00:59:58,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:59,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:59,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:59,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063340765] [2020-10-27 00:59:59,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:59:59,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 00:59:59,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718180743] [2020-10-27 00:59:59,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 00:59:59,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 00:59:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 00:59:59,067 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-27 01:00:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:01,050 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 01:00:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:00:01,051 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 01:00:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:01,052 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:00:01,052 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:00:01,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:00:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:00:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 01:00:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:00:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-27 01:00:01,066 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-27 01:00:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:01,066 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-27 01:00:01,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:00:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-27 01:00:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:00:01,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:01,067 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:01,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:00:01,067 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash -973464272, now seen corresponding path program 29 times [2020-10-27 01:00:01,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:01,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479917124] [2020-10-27 01:00:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:01,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:01,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:00:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:02,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:02,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:02,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:02,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:02,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479917124] [2020-10-27 01:00:02,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:02,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:00:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831462121] [2020-10-27 01:00:02,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:00:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:00:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:00:02,315 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-27 01:00:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:04,216 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 01:00:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:00:04,217 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 01:00:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:04,218 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:00:04,218 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:00:04,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:00:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:00:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 01:00:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:00:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-27 01:00:04,227 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-27 01:00:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:04,227 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-27 01:00:04,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:00:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-27 01:00:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:00:04,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:04,228 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:04,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:00:04,228 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:04,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1639797362, now seen corresponding path program 30 times [2020-10-27 01:00:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:04,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323074046] [2020-10-27 01:00:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:04,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:00:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:04,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:00:04,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:05,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:05,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:05,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:00:05,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:05,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:05,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323074046] [2020-10-27 01:00:05,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:05,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:00:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741470639] [2020-10-27 01:00:05,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:00:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:00:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:00:05,747 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-27 01:00:07,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:07,856 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 01:00:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:00:07,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 01:00:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:07,859 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:00:07,859 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:00:07,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:00:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:00:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 01:00:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:00:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-27 01:00:07,873 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-27 01:00:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:07,874 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-27 01:00:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:00:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-27 01:00:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:00:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:07,874 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:07,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:00:07,875 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash 428359476, now seen corresponding path program 31 times [2020-10-27 01:00:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550910025] [2020-10-27 01:00:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:07,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:00:08,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:00:08,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:09,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:09,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:09,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550910025] [2020-10-27 01:00:09,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:09,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:00:09,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573132903] [2020-10-27 01:00:09,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:00:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:00:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:00:09,159 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-27 01:00:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:11,430 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 01:00:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:00:11,431 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 01:00:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:11,432 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:00:11,432 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:00:11,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:00:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:00:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-27 01:00:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:00:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-27 01:00:11,440 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-27 01:00:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:11,440 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-27 01:00:11,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:00:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-27 01:00:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:00:11,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:11,441 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:11,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:00:11,441 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 172688246, now seen corresponding path program 32 times [2020-10-27 01:00:11,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:11,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375110980] [2020-10-27 01:00:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:11,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:00:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:12,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375110980] [2020-10-27 01:00:12,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:12,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:00:12,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599096946] [2020-10-27 01:00:12,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:00:12,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:12,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:00:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:00:12,843 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-27 01:00:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:15,259 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 01:00:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:00:15,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 01:00:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:15,261 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:00:15,261 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:00:15,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:00:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:00:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 01:00:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:00:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-27 01:00:15,268 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-27 01:00:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:15,268 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-27 01:00:15,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:00:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-27 01:00:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:00:15,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:15,269 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:15,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:00:15,269 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -714227912, now seen corresponding path program 33 times [2020-10-27 01:00:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:15,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512299088] [2020-10-27 01:00:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:15,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:15,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:00:15,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:15,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-27 01:00:15,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:00:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:00:15,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:16,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:16,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:16,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:16,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512299088] [2020-10-27 01:00:16,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:16,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:00:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403014290] [2020-10-27 01:00:16,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:00:16,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:00:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:00:16,775 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-27 01:00:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:19,252 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 01:00:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:00:19,253 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 01:00:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:19,254 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:00:19,255 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:00:19,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:00:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:00:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 01:00:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:00:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-27 01:00:19,262 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-27 01:00:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:19,263 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-27 01:00:19,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:00:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-27 01:00:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:00:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:19,263 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:19,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:00:19,264 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1657836154, now seen corresponding path program 34 times [2020-10-27 01:00:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:19,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698616207] [2020-10-27 01:00:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:19,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:19,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:00:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:20,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:20,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698616207] [2020-10-27 01:00:20,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:20,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:00:20,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138813666] [2020-10-27 01:00:20,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:00:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:00:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:00:20,982 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-27 01:00:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:23,537 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 01:00:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:00:23,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 01:00:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:23,538 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:00:23,538 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:00:23,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:00:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:00:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-27 01:00:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:00:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-27 01:00:23,545 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-27 01:00:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:23,546 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-27 01:00:23,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:00:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-27 01:00:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:00:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:23,547 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:23,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:00:23,547 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash 583769404, now seen corresponding path program 35 times [2020-10-27 01:00:23,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:23,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580282227] [2020-10-27 01:00:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:24,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:00:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:25,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:25,176 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 01:00:25,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580282227] [2020-10-27 01:00:25,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:25,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:00:25,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266171923] [2020-10-27 01:00:25,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:00:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:00:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:00:25,178 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-27 01:00:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:27,740 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 01:00:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:00:27,741 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 01:00:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:27,742 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:00:27,742 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:00:27,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:00:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:00:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 01:00:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:00:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-27 01:00:27,749 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-27 01:00:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:27,749 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-27 01:00:27,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:00:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-27 01:00:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:00:27,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:27,750 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:27,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:00:27,750 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -802226306, now seen corresponding path program 36 times [2020-10-27 01:00:27,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:27,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587586051] [2020-10-27 01:00:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:28,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:28,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:00:28,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:00:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:29,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:29,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:29,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:29,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587586051] [2020-10-27 01:00:29,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:29,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:00:29,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197605889] [2020-10-27 01:00:29,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:00:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:00:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:00:29,426 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-27 01:00:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:32,217 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 01:00:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:00:32,217 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 01:00:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:32,219 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:00:32,219 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:00:32,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:00:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:00:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-27 01:00:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:00:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-27 01:00:32,225 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-27 01:00:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:32,225 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-27 01:00:32,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:00:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-27 01:00:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:00:32,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:32,226 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:32,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:00:32,226 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:32,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1304241856, now seen corresponding path program 37 times [2020-10-27 01:00:32,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:32,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691741192] [2020-10-27 01:00:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:32,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:32,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:00:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:33,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:33,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:33,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691741192] [2020-10-27 01:00:33,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:33,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:00:33,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204373936] [2020-10-27 01:00:33,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:00:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:33,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:00:33,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:00:33,892 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-27 01:00:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:36,859 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 01:00:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:00:36,860 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 01:00:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:36,862 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:00:36,862 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:00:36,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:00:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:00:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 01:00:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:00:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-27 01:00:36,876 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-27 01:00:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:36,876 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-27 01:00:36,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:00:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-27 01:00:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:00:36,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:36,877 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:36,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:00:36,878 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1590119042, now seen corresponding path program 38 times [2020-10-27 01:00:36,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:36,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855700069] [2020-10-27 01:00:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:00:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:38,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:38,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:38,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855700069] [2020-10-27 01:00:38,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:38,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:00:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5334887] [2020-10-27 01:00:38,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:00:38,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:00:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:00:38,715 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-27 01:00:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:41,833 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 01:00:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:00:41,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 01:00:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:41,835 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:00:41,835 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:00:41,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:00:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:00:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-27 01:00:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:00:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-27 01:00:41,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-27 01:00:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:41,845 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-27 01:00:41,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:00:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-27 01:00:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:00:41,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:41,846 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:41,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:00:41,846 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash -67865788, now seen corresponding path program 39 times [2020-10-27 01:00:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:41,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621681255] [2020-10-27 01:00:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:42,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:42,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:00:42,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:42,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 01:00:42,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:00:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:00:42,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:43,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:43,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621681255] [2020-10-27 01:00:43,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:43,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:00:43,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529890893] [2020-10-27 01:00:43,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:00:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:00:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:00:43,845 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-27 01:00:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:46,937 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 01:00:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:00:46,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 01:00:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:46,939 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:00:46,939 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:00:46,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:00:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:00:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-27 01:00:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:00:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-27 01:00:46,949 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-27 01:00:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:46,949 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-27 01:00:46,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:00:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-27 01:00:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:00:46,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:46,950 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:46,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:00:46,950 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash 41579398, now seen corresponding path program 40 times [2020-10-27 01:00:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758121522] [2020-10-27 01:00:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:46,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:47,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:47,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:00:47,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:00:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:49,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:49,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:49,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:49,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:49,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:49,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:49,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:49,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758121522] [2020-10-27 01:00:49,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:49,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:00:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571559197] [2020-10-27 01:00:49,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:00:49,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:00:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:00:49,077 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-27 01:00:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:52,388 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 01:00:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:00:52,388 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 01:00:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:52,390 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:00:52,390 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 01:00:52,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:00:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 01:00:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-27 01:00:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:00:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-27 01:00:52,401 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-27 01:00:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:52,401 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-27 01:00:52,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:00:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-27 01:00:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:00:52,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:52,402 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:52,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:00:52,402 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2139188040, now seen corresponding path program 41 times [2020-10-27 01:00:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:52,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076259148] [2020-10-27 01:00:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:52,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:00:53,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:54,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:54,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:54,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:00:54,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:54,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076259148] [2020-10-27 01:00:54,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:54,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:00:54,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228012714] [2020-10-27 01:00:54,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:00:54,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:00:54,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:00:54,523 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-27 01:00:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:57,972 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 01:00:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:00:57,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-27 01:00:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:57,974 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:00:57,974 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:00:57,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:00:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:00:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 01:00:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:00:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-27 01:00:57,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-27 01:00:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-27 01:00:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:00:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-27 01:00:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:00:57,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:57,984 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:57,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:00:57,985 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -693536118, now seen corresponding path program 42 times [2020-10-27 01:00:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:57,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327444579] [2020-10-27 01:00:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:58,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:58,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:58,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:00:58,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:00:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:00,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:00,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:00,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:00,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:00,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:00,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327444579] [2020-10-27 01:01:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:01:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34646741] [2020-10-27 01:01:00,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:01:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:01:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:01:00,244 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-27 01:01:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:03,847 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 01:01:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:01:03,848 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-27 01:01:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:03,849 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:01:03,850 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:01:03,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:01:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:01:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-27 01:01:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:01:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-27 01:01:03,858 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-27 01:01:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:03,858 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-27 01:01:03,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:01:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-27 01:01:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:01:03,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:03,859 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:03,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:01:03,859 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash 67813708, now seen corresponding path program 43 times [2020-10-27 01:01:03,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:03,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358873086] [2020-10-27 01:01:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:01:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:04,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:01:04,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:06,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:06,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:06,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:06,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:06,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358873086] [2020-10-27 01:01:06,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:06,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:01:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877046619] [2020-10-27 01:01:06,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:01:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:01:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:01:06,176 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-27 01:01:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:09,841 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 01:01:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:01:09,842 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-27 01:01:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:09,843 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:01:09,844 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:01:09,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:01:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:01:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-27 01:01:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:01:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-27 01:01:09,852 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-27 01:01:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:09,853 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-27 01:01:09,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:01:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-27 01:01:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:01:09,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:09,854 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:09,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:01:09,854 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1580556174, now seen corresponding path program 44 times [2020-10-27 01:01:09,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:09,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260900619] [2020-10-27 01:01:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:01:10,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260900619] [2020-10-27 01:01:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:01:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669751704] [2020-10-27 01:01:12,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:01:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:01:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:01:12,287 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-27 01:01:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:16,088 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 01:01:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:01:16,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-27 01:01:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:16,090 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:01:16,090 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:01:16,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:01:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:01:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-27 01:01:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:01:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-27 01:01:16,100 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-27 01:01:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:16,100 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-27 01:01:16,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:01:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-27 01:01:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:01:16,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:16,101 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:16,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:01:16,101 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash -667847344, now seen corresponding path program 45 times [2020-10-27 01:01:16,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:16,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180879817] [2020-10-27 01:01:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 01:01:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:18,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:18,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:18,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:18,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180879817] [2020-10-27 01:01:18,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:18,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:01:18,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864868712] [2020-10-27 01:01:18,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:01:18,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:01:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:01:18,850 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-27 01:01:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:22,802 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 01:01:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:01:22,803 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-27 01:01:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:22,804 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:01:22,804 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:01:22,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:01:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:01:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-27 01:01:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:01:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-27 01:01:22,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-27 01:01:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:22,814 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-27 01:01:22,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:01:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-27 01:01:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:01:22,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:22,815 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:22,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:01:22,816 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1015078254, now seen corresponding path program 46 times [2020-10-27 01:01:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:22,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023354751] [2020-10-27 01:01:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:01:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:25,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023354751] [2020-10-27 01:01:25,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:25,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:01:25,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781968848] [2020-10-27 01:01:25,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:01:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:01:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:01:25,366 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-27 01:01:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:29,882 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 01:01:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:01:29,883 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-27 01:01:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:29,887 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:01:29,887 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 01:01:29,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:01:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 01:01:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-27 01:01:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:01:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-27 01:01:29,894 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-27 01:01:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:29,895 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-27 01:01:29,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:01:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-27 01:01:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:01:29,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:29,895 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:29,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:01:29,896 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash 303466324, now seen corresponding path program 47 times [2020-10-27 01:01:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:29,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118507219] [2020-10-27 01:01:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:01:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:32,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:32,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118507219] [2020-10-27 01:01:32,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:32,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:01:32,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682777116] [2020-10-27 01:01:32,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:01:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:01:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:01:32,653 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-27 01:01:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:37,125 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 01:01:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:01:37,126 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-27 01:01:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:37,128 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:01:37,128 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:01:37,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:01:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:01:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-27 01:01:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:01:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-27 01:01:37,137 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-27 01:01:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:37,137 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-27 01:01:37,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:01:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-27 01:01:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:01:37,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:37,138 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:37,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:01:37,138 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash 409453462, now seen corresponding path program 48 times [2020-10-27 01:01:37,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:37,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453499512] [2020-10-27 01:01:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:38,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:38,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:01:38,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:01:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:40,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:40,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453499512] [2020-10-27 01:01:40,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:40,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:01:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503519937] [2020-10-27 01:01:40,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:01:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:01:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:01:40,115 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-27 01:01:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:44,521 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 01:01:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:01:44,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-27 01:01:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:44,523 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:01:44,524 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:01:44,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:01:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:01:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-27 01:01:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:01:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-27 01:01:44,532 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-27 01:01:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:44,532 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-27 01:01:44,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:01:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-27 01:01:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 01:01:44,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:44,533 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:44,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:01:44,533 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash -816122024, now seen corresponding path program 49 times [2020-10-27 01:01:44,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:44,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463988764] [2020-10-27 01:01:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:45,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:45,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 01:01:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:47,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:47,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463988764] [2020-10-27 01:01:47,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:47,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:01:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806661387] [2020-10-27 01:01:47,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:01:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:01:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:01:47,455 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-27 01:01:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:52,124 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 01:01:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:01:52,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-27 01:01:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:52,127 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:01:52,127 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:01:52,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:01:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:01:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-27 01:01:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:01:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-27 01:01:52,136 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-27 01:01:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:52,137 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-27 01:01:52,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:01:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-27 01:01:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 01:01:52,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:52,138 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:52,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:01:52,138 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1773124966, now seen corresponding path program 50 times [2020-10-27 01:01:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:52,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082210273] [2020-10-27 01:01:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:52,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:01:53,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:53,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:01:53,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:55,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:55,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:55,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:55,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:55,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082210273] [2020-10-27 01:01:55,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:55,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:01:55,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201439650] [2020-10-27 01:01:55,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:01:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:01:55,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:01:55,326 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-27 01:02:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:00,109 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 01:02:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:02:00,110 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-27 01:02:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:00,111 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:02:00,111 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:02:00,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:02:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:02:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-27 01:02:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:02:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-27 01:02:00,120 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-27 01:02:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:00,120 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-27 01:02:00,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:02:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-27 01:02:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:02:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:00,121 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:00,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:02:00,122 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1965016412, now seen corresponding path program 51 times [2020-10-27 01:02:00,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:00,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706467861] [2020-10-27 01:02:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:02:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 01:02:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:03,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:03,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706467861] [2020-10-27 01:02:03,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:03,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:02:03,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827886450] [2020-10-27 01:02:03,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:02:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:02:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:02:03,434 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-27 01:02:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:08,349 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 01:02:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:02:08,349 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-27 01:02:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:08,351 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:02:08,351 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:02:08,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 01:02:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:02:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-27 01:02:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:02:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-27 01:02:08,360 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-27 01:02:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:08,360 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-27 01:02:08,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:02:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-27 01:02:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:02:08,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:08,361 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:08,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:02:08,361 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash -568746082, now seen corresponding path program 52 times [2020-10-27 01:02:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:08,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046934516] [2020-10-27 01:02:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:08,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:02:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:02:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:11,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:11,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:11,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:11,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:11,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046934516] [2020-10-27 01:02:11,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:11,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:02:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996621482] [2020-10-27 01:02:11,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:02:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:02:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:02:11,748 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-27 01:02:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:16,855 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 01:02:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:02:16,855 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-27 01:02:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:16,857 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:02:16,857 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:02:16,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 01:02:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:02:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-27 01:02:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:02:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-27 01:02:16,867 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-27 01:02:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:16,867 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-27 01:02:16,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:02:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-27 01:02:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 01:02:16,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:16,868 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:16,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:02:16,868 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -268045984, now seen corresponding path program 53 times [2020-10-27 01:02:16,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:16,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919507923] [2020-10-27 01:02:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:17,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 01:02:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:20,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:20,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:20,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919507923] [2020-10-27 01:02:20,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:20,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 01:02:20,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128182098] [2020-10-27 01:02:20,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 01:02:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 01:02:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:02:20,300 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-27 01:02:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:25,503 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 01:02:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:02:25,503 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-27 01:02:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:25,505 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:02:25,505 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:02:25,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 01:02:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:02:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-27 01:02:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:02:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-27 01:02:25,515 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-27 01:02:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:25,516 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-27 01:02:25,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 01:02:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-27 01:02:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:02:25,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:25,517 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:25,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:02:25,517 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 941939362, now seen corresponding path program 54 times [2020-10-27 01:02:25,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:25,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65409923] [2020-10-27 01:02:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:26,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:26,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:02:26,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-27 01:02:26,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 01:02:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:02:26,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:29,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:29,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65409923] [2020-10-27 01:02:29,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:29,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 01:02:29,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932536973] [2020-10-27 01:02:29,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 01:02:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 01:02:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:02:29,149 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-27 01:02:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:34,766 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-27 01:02:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:02:34,767 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-27 01:02:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:34,768 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:02:34,768 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:02:34,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 01:02:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:02:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-27 01:02:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:02:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-27 01:02:34,776 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-27 01:02:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:34,776 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-27 01:02:34,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 01:02:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-27 01:02:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 01:02:34,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:34,776 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:34,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:02:34,777 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash -198280348, now seen corresponding path program 55 times [2020-10-27 01:02:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024100106] [2020-10-27 01:02:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:34,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 01:02:35,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:35,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 01:02:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:38,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:38,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:38,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024100106] [2020-10-27 01:02:38,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:38,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 01:02:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255276580] [2020-10-27 01:02:38,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 01:02:38,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 01:02:38,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:02:38,607 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-27 01:02:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:44,218 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-27 01:02:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:02:44,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-27 01:02:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:44,220 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:02:44,220 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:02:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 01:02:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:02:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-27 01:02:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:02:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-27 01:02:44,242 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-27 01:02:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:44,243 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-27 01:02:44,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 01:02:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-27 01:02:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 01:02:44,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:44,244 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:44,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:02:44,244 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash -732761178, now seen corresponding path program 56 times [2020-10-27 01:02:44,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:44,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738259194] [2020-10-27 01:02:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:45,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:45,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 01:02:45,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:45,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-27 01:02:45,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:45,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 01:02:45,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:45,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:02:45,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:48,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:48,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:48,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738259194] [2020-10-27 01:02:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:48,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 01:02:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869605427] [2020-10-27 01:02:48,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 01:02:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 01:02:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:02:48,300 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-27 01:02:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:54,067 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-27 01:02:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 01:02:54,068 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-27 01:02:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:54,069 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:02:54,070 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:02:54,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-27 01:02:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:02:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-27 01:02:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:02:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-27 01:02:54,077 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-27 01:02:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:54,077 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-27 01:02:54,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 01:02:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-27 01:02:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:02:54,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:54,078 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:54,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:02:54,078 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1027236712, now seen corresponding path program 57 times [2020-10-27 01:02:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:54,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824765432] [2020-10-27 01:02:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:55,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 01:02:55,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:58,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:58,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:58,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:58,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:58,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:58,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:58,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:58,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:58,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:58,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:58,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:58,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824765432] [2020-10-27 01:02:58,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:58,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 01:02:58,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534573750] [2020-10-27 01:02:58,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 01:02:58,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 01:02:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:02:58,352 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-27 01:03:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:04,343 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-27 01:03:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 01:03:04,344 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-27 01:03:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:04,345 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:03:04,345 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:03:04,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-27 01:03:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:03:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-27 01:03:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:03:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-27 01:03:04,354 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-27 01:03:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:04,355 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-27 01:03:04,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 01:03:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-27 01:03:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 01:03:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:04,356 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:04,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:03:04,356 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 168094378, now seen corresponding path program 58 times [2020-10-27 01:03:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:04,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729959907] [2020-10-27 01:03:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 01:03:05,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:05,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 01:03:05,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:08,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729959907] [2020-10-27 01:03:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 01:03:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942593891] [2020-10-27 01:03:08,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 01:03:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 01:03:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:03:08,573 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states.