/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/array-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:52,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:52,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:53,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:53,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:53,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:53,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:53,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:53,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:53,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:53,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:53,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:53,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:53,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:53,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:53,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:53,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:53,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:53,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:53,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:53,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:53,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:53,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:53,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:53,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:53,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:53,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:53,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:53,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:53,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:53,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:53,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:53,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:53,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:53,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:53,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:53,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:53,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:53,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:53,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:53,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:53,093 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 [2020-10-26 19:13:53,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:53,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:53,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:53,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:53,147 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:53,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:53,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:53,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:53,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:53,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:53,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:53,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:53,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:53,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:53,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:53,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:53,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:53,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:53,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:53,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:53,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:53,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:53,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:53,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:53,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:53,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:53,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:53,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:53,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:53,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:53,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:53,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:53,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:53,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:53,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:53,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2020-10-26 19:13:53,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cbe530e7/5bd71080e11a438d8d758b2c10fe12bb/FLAG6ff164886 [2020-10-26 19:13:54,379 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:54,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2020-10-26 19:13:54,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cbe530e7/5bd71080e11a438d8d758b2c10fe12bb/FLAG6ff164886 [2020-10-26 19:13:54,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cbe530e7/5bd71080e11a438d8d758b2c10fe12bb [2020-10-26 19:13:54,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:54,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:54,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:54,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:54,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:54,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:54" (1/1) ... [2020-10-26 19:13:54,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8fdfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:54, skipping insertion in model container [2020-10-26 19:13:54,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:54" (1/1) ... [2020-10-26 19:13:54,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:54,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:54,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:55,002 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:55,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:55,067 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:55,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55 WrapperNode [2020-10-26 19:13:55,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:55,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:55,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:55,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:55,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (1/1) ... [2020-10-26 19:13:55,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:55,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:55,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:55,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:55,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (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 [2020-10-26 19:13:55,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:55,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:55,261 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:55,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:55,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:55,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:55,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:55,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:55,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:55,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:55,644 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:13:55,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:55 BoogieIcfgContainer [2020-10-26 19:13:55,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:55,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:55,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:55,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:55,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:54" (1/3) ... [2020-10-26 19:13:55,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:55, skipping insertion in model container [2020-10-26 19:13:55,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:55" (2/3) ... [2020-10-26 19:13:55,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:55, skipping insertion in model container [2020-10-26 19:13:55,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:55" (3/3) ... [2020-10-26 19:13:55,659 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2020-10-26 19:13:55,672 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:55,677 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:55,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:55,726 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:55,726 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:55,726 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:55,726 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:55,726 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:55,727 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:55,727 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:55,727 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:13:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:55,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,751 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -87603489, now seen corresponding path program 1 times [2020-10-26 19:13:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451578813] [2020-10-26 19:13:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:56,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:56,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 19:13:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:56,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:56,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:56,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:13:56,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:56,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:56,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:56,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:56,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451578813] [2020-10-26 19:13:56,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:56,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:56,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53916649] [2020-10-26 19:13:56,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:56,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:56,267 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:13:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:56,376 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-26 19:13:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:56,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:13:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:56,386 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:13:56,386 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:13:56,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:13:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:13:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:13:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:13:56,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:13:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:56,429 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:13:56,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:13:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:56,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:56,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:56,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:56,431 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash 511332686, now seen corresponding path program 1 times [2020-10-26 19:13:56,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:56,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764530355] [2020-10-26 19:13:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:56,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-26 19:13:56,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:13:56,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:56,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:13:56,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:56,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:56,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:13:56,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:56,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764530355] [2020-10-26 19:13:56,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:13:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929670961] [2020-10-26 19:13:56,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:13:56,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:13:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:56,815 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:13:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:56,953 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-26 19:13:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:13:56,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:13:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:56,955 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:13:56,955 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:13:56,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:13:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 19:13:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:13:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-26 19:13:56,964 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-26 19:13:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:56,965 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-26 19:13:56,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:13:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-26 19:13:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:13:56,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:56,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:56,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:56,968 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1856707308, now seen corresponding path program 1 times [2020-10-26 19:13:56,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:56,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9693007] [2020-10-26 19:13:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:13:57,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 19:13:57,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:57,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:57,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9693007] [2020-10-26 19:13:57,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:57,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:57,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939494448] [2020-10-26 19:13:57,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:57,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:57,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:57,222 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-26 19:13:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:57,306 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-26 19:13:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:57,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:13:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:57,308 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:13:57,308 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:13:57,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:13:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-26 19:13:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:13:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-26 19:13:57,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-10-26 19:13:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:57,317 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-26 19:13:57,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-26 19:13:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:13:57,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:57,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1976562954, now seen corresponding path program 2 times [2020-10-26 19:13:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148049171] [2020-10-26 19:13:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:13:57,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 19:13:57,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:13:57,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:57,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148049171] [2020-10-26 19:13:57,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:57,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:57,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054375374] [2020-10-26 19:13:57,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:57,717 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-26 19:13:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:57,944 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-26 19:13:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:57,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:13:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:57,946 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:13:57,946 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:13:57,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:13:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-26 19:13:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:13:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-26 19:13:57,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-10-26 19:13:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:57,961 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-26 19:13:57,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-26 19:13:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:13:57,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:57,963 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1193721768, now seen corresponding path program 3 times [2020-10-26 19:13:57,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732702692] [2020-10-26 19:13:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:13:58,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:58,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-26 19:13:58,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:13:58,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:58,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:13:58,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:58,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:58,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:58,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:58,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732702692] [2020-10-26 19:13:58,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:58,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:13:58,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616866270] [2020-10-26 19:13:58,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:13:58,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:58,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:13:58,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:58,390 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-26 19:13:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:58,483 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-26 19:13:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:13:58,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:13:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:58,484 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:13:58,485 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:13:58,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:13:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 19:13:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:13:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:13:58,492 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-26 19:13:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:58,493 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:13:58,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:13:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:13:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:13:58,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:58,494 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:58,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:58,495 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash 502618822, now seen corresponding path program 4 times [2020-10-26 19:13:58,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:58,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530106702] [2020-10-26 19:13:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:58,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:13:58,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:58,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-26 19:13:58,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:13:58,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:59,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530106702] [2020-10-26 19:13:59,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904905972] [2020-10-26 19:13:59,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:59,035 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-10-26 19:13:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,139 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:13:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:13:59,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-26 19:13:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,140 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:13:59,140 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:13:59,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:13:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:13:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:13:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-26 19:13:59,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-26 19:13:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,148 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-26 19:13:59,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-26 19:13:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:13:59,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,149 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:59,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2072618596, now seen corresponding path program 5 times [2020-10-26 19:13:59,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541988115] [2020-10-26 19:13:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:13:59,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:59,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-26 19:13:59,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:13:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:13:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541988115] [2020-10-26 19:13:59,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:13:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928122485] [2020-10-26 19:13:59,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:13:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:13:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:59,771 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2020-10-26 19:13:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,873 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:13:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:13:59,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 19:13:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,875 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:13:59,875 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:13:59,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:13:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:13:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:13:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:13:59,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2020-10-26 19:13:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,882 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:13:59,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:13:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:13:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:13:59,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,883 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:13:59,883 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -986086782, now seen corresponding path program 6 times [2020-10-26 19:13:59,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675829477] [2020-10-26 19:13:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:14:00,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:00,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:00,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675829477] [2020-10-26 19:14:00,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:00,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:14:00,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625925002] [2020-10-26 19:14:00,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:14:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:14:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:00,765 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-26 19:14:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:00,898 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 19:14:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:14:00,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 19:14:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:00,900 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:14:00,900 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:14:00,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:14:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:14:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:14:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-26 19:14:00,911 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-26 19:14:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:00,913 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-26 19:14:00,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:14:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-26 19:14:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:14:00,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:00,915 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:00,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:14:00,915 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1650642720, now seen corresponding path program 7 times [2020-10-26 19:14:00,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:00,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996196144] [2020-10-26 19:14:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:14:01,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:01,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-26 19:14:01,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:14:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:01,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:01,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:14:01,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:01,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:01,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996196144] [2020-10-26 19:14:01,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:01,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:14:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832585009] [2020-10-26 19:14:01,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:14:01,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:14:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:01,979 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2020-10-26 19:14:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:02,107 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-26 19:14:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:14:02,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:14:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:02,110 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:14:02,110 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:14:02,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:14:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:14:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:14:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-26 19:14:02,125 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2020-10-26 19:14:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:02,126 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-26 19:14:02,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:14:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-26 19:14:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:14:02,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:02,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:02,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:02,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1516989502, now seen corresponding path program 8 times [2020-10-26 19:14:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:02,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931807740] [2020-10-26 19:14:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:02,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:14:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:03,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:03,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:03,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:03,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:03,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:03,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931807740] [2020-10-26 19:14:03,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:03,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:03,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219900954] [2020-10-26 19:14:03,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:03,469 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2020-10-26 19:14:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:03,616 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-26 19:14:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:14:03,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:14:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:03,617 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:14:03,617 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:14:03,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:14:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:14:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:14:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-26 19:14:03,628 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-10-26 19:14:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:03,628 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-26 19:14:03,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-26 19:14:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:14:03,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:03,632 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:03,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:03,633 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1925265884, now seen corresponding path program 9 times [2020-10-26 19:14:03,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:03,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642791847] [2020-10-26 19:14:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:03,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:14:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-26 19:14:05,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:14:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:14:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:05,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:05,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:05,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:05,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642791847] [2020-10-26 19:14:05,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:05,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:14:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97416990] [2020-10-26 19:14:05,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:14:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:14:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:05,323 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-26 19:14:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:05,440 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:14:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:14:05,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:14:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:05,441 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:14:05,441 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:14:05,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:14:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:14:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:14:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:14:05,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-26 19:14:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:05,451 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:14:05,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:14:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:14:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:14:05,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:05,453 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:05,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:05,453 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash -858122246, now seen corresponding path program 10 times [2020-10-26 19:14:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:05,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206440500] [2020-10-26 19:14:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:14:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-26 19:14:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:14:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:07,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206440500] [2020-10-26 19:14:07,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:07,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:14:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305272339] [2020-10-26 19:14:07,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:14:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:07,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:14:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:07,172 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-10-26 19:14:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,327 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-26 19:14:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:14:07,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:14:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,329 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:14:07,329 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:14:07,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:14:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:14:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:14:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-26 19:14:07,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-26 19:14:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,339 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-26 19:14:07,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:14:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-26 19:14:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:14:07,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,340 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:07,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash 70510232, now seen corresponding path program 11 times [2020-10-26 19:14:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958053886] [2020-10-26 19:14:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:14:09,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:14:09,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:09,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:09,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:14:09,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:09,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:09,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958053886] [2020-10-26 19:14:09,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:09,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:14:09,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277237621] [2020-10-26 19:14:09,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:14:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:09,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:14:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:09,261 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-10-26 19:14:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:09,354 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 19:14:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:09,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-26 19:14:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:09,356 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:14:09,356 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:14:09,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:14:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:14:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:14:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-26 19:14:09,364 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-10-26 19:14:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:09,364 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-26 19:14:09,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:14:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-26 19:14:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:14:09,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:09,366 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:09,366 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash -866875978, now seen corresponding path program 12 times [2020-10-26 19:14:09,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501224401] [2020-10-26 19:14:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:11,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:14:11,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-10-26 19:14:11,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:14:11,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:11,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:11,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:11,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:11,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:11,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:11,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501224401] [2020-10-26 19:14:11,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:11,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:14:11,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189235991] [2020-10-26 19:14:11,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:14:11,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:14:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:11,853 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 16 states. [2020-10-26 19:14:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:12,004 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-26 19:14:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:14:12,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-26 19:14:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:12,005 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:14:12,005 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:14:12,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:14:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:14:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:14:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-26 19:14:12,011 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2020-10-26 19:14:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:12,012 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-26 19:14:12,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:14:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-26 19:14:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:14:12,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:12,012 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:12,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:12,013 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash 248108372, now seen corresponding path program 13 times [2020-10-26 19:14:12,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:12,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497412758] [2020-10-26 19:14:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:14:14,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:14,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-26 19:14:14,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:14:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:14:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:14,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:14,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:14,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:14,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:14,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:14,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497412758] [2020-10-26 19:14:14,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:14,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:14:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61571267] [2020-10-26 19:14:14,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:14:14,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:14:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:14,499 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 17 states. [2020-10-26 19:14:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:14,656 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 19:14:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:14:14,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-26 19:14:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:14,657 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:14:14,658 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:14:14,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:14:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:14:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:14:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-26 19:14:14,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2020-10-26 19:14:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-26 19:14:14,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:14:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-26 19:14:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:14:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:14,664 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:14,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:14:14,665 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1993755278, now seen corresponding path program 14 times [2020-10-26 19:14:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:14,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222301816] [2020-10-26 19:14:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:14:17,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2361 [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:14:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:17,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:17,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:17,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:17,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:17,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222301816] [2020-10-26 19:14:17,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:17,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:14:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627174993] [2020-10-26 19:14:17,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:14:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:14:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:17,286 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-10-26 19:14:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:17,394 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-26 19:14:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:14:17,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:14:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:17,396 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:14:17,396 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:14:17,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:14:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:14:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:14:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-26 19:14:17,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 45 [2020-10-26 19:14:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:17,406 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-26 19:14:17,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:14:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-26 19:14:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:14:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:17,407 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:17,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:14:17,408 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:17,413 INFO L82 PathProgramCache]: Analyzing trace with hash -351140336, now seen corresponding path program 15 times [2020-10-26 19:14:17,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:17,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490367702] [2020-10-26 19:14:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:17,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:20,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:14:20,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:14:20,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:20,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:20,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:20,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490367702] [2020-10-26 19:14:20,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:20,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:14:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919344792] [2020-10-26 19:14:20,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:14:20,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:14:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:20,394 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 19 states. [2020-10-26 19:14:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:20,606 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-26 19:14:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:14:20,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:14:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:20,607 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:14:20,607 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:14:20,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:14:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:14:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:14:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-26 19:14:20,618 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 47 [2020-10-26 19:14:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:20,619 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-26 19:14:20,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:14:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-26 19:14:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:14:20,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:20,619 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:20,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:20,620 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1948821294, now seen corresponding path program 16 times [2020-10-26 19:14:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:20,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277411053] [2020-10-26 19:14:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:23,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:14:23,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2711 [2020-10-26 19:14:23,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:14:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:14:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:23,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:23,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:23,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:23,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:23,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277411053] [2020-10-26 19:14:23,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:23,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:14:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832209386] [2020-10-26 19:14:23,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:14:23,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:14:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:23,710 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-10-26 19:14:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:23,838 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 19:14:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:14:23,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-26 19:14:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:23,839 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:14:23,840 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:14:23,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:14:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:14:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:14:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-26 19:14:23,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-26 19:14:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-26 19:14:23,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:14:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-26 19:14:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:14:23,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:23,847 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:23,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:14:23,848 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash 303790284, now seen corresponding path program 17 times [2020-10-26 19:14:23,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:23,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955303293] [2020-10-26 19:14:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:26,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:14:26,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:26,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2860 [2020-10-26 19:14:26,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:14:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:26,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:27,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:27,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955303293] [2020-10-26 19:14:27,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:27,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:14:27,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866602441] [2020-10-26 19:14:27,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:14:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:14:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:27,069 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 21 states. [2020-10-26 19:14:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:27,269 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-26 19:14:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:14:27,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-26 19:14:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:27,271 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:14:27,271 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:14:27,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:14:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:14:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:14:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-26 19:14:27,280 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2020-10-26 19:14:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:27,280 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-26 19:14:27,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:14:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-26 19:14:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:14:27,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:27,281 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:27,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:14:27,282 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash -23045398, now seen corresponding path program 18 times [2020-10-26 19:14:27,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:27,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934211082] [2020-10-26 19:14:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2983 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:14:30,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:30,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:30,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:30,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:30,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934211082] [2020-10-26 19:14:30,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:30,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:14:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58470328] [2020-10-26 19:14:30,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:14:30,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:14:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:30,673 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 22 states. [2020-10-26 19:14:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:30,814 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:14:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:14:30,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-26 19:14:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:30,815 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:14:30,815 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:14:30,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:14:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:14:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:14:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-26 19:14:30,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2020-10-26 19:14:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:30,822 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-26 19:14:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:14:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-26 19:14:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:14:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:30,823 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:30,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:14:30,823 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:30,824 INFO L82 PathProgramCache]: Analyzing trace with hash -579523192, now seen corresponding path program 19 times [2020-10-26 19:14:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:30,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024474461] [2020-10-26 19:14:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3118 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:14:33,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:34,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:34,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:34,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024474461] [2020-10-26 19:14:34,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:34,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:14:34,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263258424] [2020-10-26 19:14:34,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:14:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:34,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:14:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:34,347 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 23 states. [2020-10-26 19:14:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:34,565 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-26 19:14:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:14:34,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-26 19:14:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:34,566 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:14:34,566 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:14:34,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:14:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:14:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:14:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-26 19:14:34,577 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-26 19:14:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:34,577 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-26 19:14:34,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:14:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-26 19:14:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:14:34,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:34,578 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:34,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:14:34,579 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1516228774, now seen corresponding path program 20 times [2020-10-26 19:14:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:34,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684157558] [2020-10-26 19:14:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:14:38,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-26 19:14:38,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:38,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:14:38,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:38,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:38,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:38,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:38,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:38,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684157558] [2020-10-26 19:14:38,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:38,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427555796] [2020-10-26 19:14:38,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:38,728 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 24 states. [2020-10-26 19:14:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:38,945 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-26 19:14:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:14:38,946 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-26 19:14:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:38,947 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:14:38,947 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:14:38,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:14:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:14:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:14:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-26 19:14:38,952 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 57 [2020-10-26 19:14:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:38,953 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-26 19:14:38,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-26 19:14:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:14:38,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:38,953 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:38,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:14:38,954 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1194206276, now seen corresponding path program 21 times [2020-10-26 19:14:38,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:38,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114004179] [2020-10-26 19:14:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:38,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:43,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:14:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:44,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:44,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114004179] [2020-10-26 19:14:44,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:44,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:14:44,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466105626] [2020-10-26 19:14:44,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:14:44,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:44,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:14:44,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:44,437 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 25 states. [2020-10-26 19:14:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:44,665 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-26 19:14:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:14:44,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-26 19:14:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:44,667 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:14:44,667 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:14:44,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:14:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:14:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:14:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-26 19:14:44,672 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 59 [2020-10-26 19:14:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:44,672 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-26 19:14:44,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:14:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-26 19:14:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:14:44,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:44,673 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:44,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:14:44,674 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 968231010, now seen corresponding path program 22 times [2020-10-26 19:14:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:44,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077188416] [2020-10-26 19:14:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:44,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4818 [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:14:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:14:49,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:49,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077188416] [2020-10-26 19:14:49,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:49,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:14:49,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068367677] [2020-10-26 19:14:49,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:14:49,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:14:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:49,980 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 26 states. [2020-10-26 19:14:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:50,234 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-26 19:14:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:14:50,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:14:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:50,236 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:14:50,236 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:14:50,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:14:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:14:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:14:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-26 19:14:50,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2020-10-26 19:14:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:50,241 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-26 19:14:50,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:14:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-26 19:14:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:14:50,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:50,242 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:50,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:14:50,242 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1445634816, now seen corresponding path program 23 times [2020-10-26 19:14:50,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:50,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004019632] [2020-10-26 19:14:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:14:55,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:55,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:55,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:55,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004019632] [2020-10-26 19:14:55,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:55,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:14:55,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974869259] [2020-10-26 19:14:55,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:14:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:14:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:55,811 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 27 states. [2020-10-26 19:14:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:56,069 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-26 19:14:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:14:56,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-26 19:14:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:56,071 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:14:56,071 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:14:56,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:14:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:14:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:14:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-26 19:14:56,077 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2020-10-26 19:14:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:56,078 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-26 19:14:56,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:14:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-26 19:14:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:14:56,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:56,078 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:56,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:14:56,079 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1888353762, now seen corresponding path program 24 times [2020-10-26 19:14:56,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:56,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25876030] [2020-10-26 19:14:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:15:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:01,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:01,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:01,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:01,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25876030] [2020-10-26 19:15:01,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:01,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:15:01,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418431216] [2020-10-26 19:15:01,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:15:01,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:01,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:15:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:01,689 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 28 states. [2020-10-26 19:15:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:01,880 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-26 19:15:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:15:01,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:15:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:01,882 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:15:01,882 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:15:01,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:15:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:15:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:15:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-26 19:15:01,887 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-26 19:15:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:01,887 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-26 19:15:01,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:15:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-26 19:15:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:15:01,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:01,888 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:01,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:15:01,888 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2139498564, now seen corresponding path program 25 times [2020-10-26 19:15:01,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:01,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173735346] [2020-10-26 19:15:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:06,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:15:06,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:07,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:07,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173735346] [2020-10-26 19:15:07,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:07,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:15:07,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242936257] [2020-10-26 19:15:07,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:15:07,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:15:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:07,526 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 29 states. [2020-10-26 19:15:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:07,816 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-26 19:15:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:15:07,817 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:15:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:07,818 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:15:07,818 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:15:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:15:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:15:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:15:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-26 19:15:07,825 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2020-10-26 19:15:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:07,825 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-26 19:15:07,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:15:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-26 19:15:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:15:07,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:07,826 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:07,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:15:07,826 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1323482586, now seen corresponding path program 26 times [2020-10-26 19:15:07,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:07,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996104837] [2020-10-26 19:15:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:15:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:13,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:13,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996104837] [2020-10-26 19:15:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:15:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702748262] [2020-10-26 19:15:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:15:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:15:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:13,568 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 30 states. [2020-10-26 19:15:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:13,874 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-26 19:15:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:15:13,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-26 19:15:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:13,876 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:15:13,876 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:15:13,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:15:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:15:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:15:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-26 19:15:13,884 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 69 [2020-10-26 19:15:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:13,886 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-26 19:15:13,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:15:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-26 19:15:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:15:13,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:13,887 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:13,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:15:13,887 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash 648713336, now seen corresponding path program 27 times [2020-10-26 19:15:13,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:13,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424163854] [2020-10-26 19:15:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:15:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424163854] [2020-10-26 19:15:19,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:19,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:15:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143917885] [2020-10-26 19:15:19,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:15:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:15:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:19,621 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 31 states. [2020-10-26 19:15:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:19,926 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-26 19:15:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:15:19,926 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:15:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:19,927 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:15:19,928 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:15:19,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:15:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:15:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:15:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-26 19:15:19,934 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-26 19:15:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:19,934 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-26 19:15:19,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:15:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-26 19:15:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:15:19,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:19,935 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:19,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:15:19,935 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash 735525782, now seen corresponding path program 28 times [2020-10-26 19:15:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:19,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843122592] [2020-10-26 19:15:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:15:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:25,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:25,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:25,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:25,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:25,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843122592] [2020-10-26 19:15:25,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:25,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:15:25,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361773370] [2020-10-26 19:15:25,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:15:25,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:15:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:15:25,674 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 32 states. [2020-10-26 19:15:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:25,862 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-26 19:15:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:15:25,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-26 19:15:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:25,863 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:15:25,864 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:15:25,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:15:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:15:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:15:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:15:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-26 19:15:25,869 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 73 [2020-10-26 19:15:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:25,869 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-26 19:15:25,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:15:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-26 19:15:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:15:25,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:25,871 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:25,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:15:25,871 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1737059532, now seen corresponding path program 29 times [2020-10-26 19:15:25,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:25,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587639322] [2020-10-26 19:15:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:30,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:15:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:15:30,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:31,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:31,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587639322] [2020-10-26 19:15:31,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:31,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:15:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596767503] [2020-10-26 19:15:31,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:15:31,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:15:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:15:31,683 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 33 states. [2020-10-26 19:15:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:32,027 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-26 19:15:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:15:32,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-26 19:15:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:32,029 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:15:32,029 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:15:32,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:15:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:15:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:15:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:15:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-26 19:15:32,035 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 75 [2020-10-26 19:15:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:32,035 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-26 19:15:32,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:15:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-26 19:15:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:15:32,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:32,037 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:32,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:15:32,037 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1520335698, now seen corresponding path program 30 times [2020-10-26 19:15:32,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:32,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134653817] [2020-10-26 19:15:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:37,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:15:37,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:37,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:37,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:37,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:37,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134653817] [2020-10-26 19:15:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:15:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376322419] [2020-10-26 19:15:37,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:15:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:15:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:15:37,880 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 34 states. [2020-10-26 19:15:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:38,220 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:15:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:15:38,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-26 19:15:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:38,223 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:15:38,223 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:15:38,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:15:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:15:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:15:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:15:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-26 19:15:38,228 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-26 19:15:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:38,229 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-26 19:15:38,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:15:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-26 19:15:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:15:38,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:38,230 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:38,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:15:38,230 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash 845992944, now seen corresponding path program 31 times [2020-10-26 19:15:38,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:38,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895927613] [2020-10-26 19:15:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:43,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:15:43,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:43,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:15:43,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:43,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:15:43,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:43,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:15:43,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:44,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:44,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:44,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:44,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895927613] [2020-10-26 19:15:44,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:44,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:15:44,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146717826] [2020-10-26 19:15:44,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:15:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:15:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:15:44,066 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 35 states. [2020-10-26 19:15:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:44,423 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-26 19:15:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:15:44,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-26 19:15:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:44,425 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:15:44,425 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:15:44,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:15:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:15:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:15:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:15:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-26 19:15:44,432 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2020-10-26 19:15:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:44,432 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-26 19:15:44,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:15:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-26 19:15:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:15:44,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:44,433 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:44,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:15:44,434 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1342668046, now seen corresponding path program 32 times [2020-10-26 19:15:44,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:44,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937750345] [2020-10-26 19:15:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:44,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:49,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:15:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:50,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:50,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:50,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937750345] [2020-10-26 19:15:50,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:50,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:15:50,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676459894] [2020-10-26 19:15:50,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:15:50,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:50,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:15:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:15:50,384 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 36 states. [2020-10-26 19:15:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:50,743 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-26 19:15:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:15:50,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-26 19:15:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:50,745 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:15:50,746 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:15:50,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:15:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:15:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:15:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:15:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-26 19:15:50,752 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 81 [2020-10-26 19:15:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:50,752 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-26 19:15:50,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:15:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-26 19:15:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:15:50,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:50,754 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:50,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:15:50,754 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1906071212, now seen corresponding path program 33 times [2020-10-26 19:15:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035799628] [2020-10-26 19:15:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:15:55,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:56,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:56,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035799628] [2020-10-26 19:15:56,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:56,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:15:56,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108269709] [2020-10-26 19:15:56,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:15:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:15:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:15:56,789 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 37 states. [2020-10-26 19:15:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:57,173 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-26 19:15:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:15:57,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-26 19:15:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:57,175 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:15:57,175 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:15:57,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:15:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:15:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:15:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:15:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-26 19:15:57,182 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 83 [2020-10-26 19:15:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:57,182 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-26 19:15:57,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:15:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-26 19:15:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:15:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:57,183 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:57,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:15:57,184 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2124332854, now seen corresponding path program 34 times [2020-10-26 19:15:57,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:57,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914527797] [2020-10-26 19:15:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:57,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:57,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:02,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:02,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:16:02,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:02,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-26 19:16:02,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:16:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:16:02,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:03,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:03,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:03,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:03,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914527797] [2020-10-26 19:16:03,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:03,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:16:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668443717] [2020-10-26 19:16:03,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:16:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:16:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:03,258 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 38 states. [2020-10-26 19:16:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:03,507 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-26 19:16:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:16:03,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-26 19:16:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:03,509 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:16:03,509 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:16:03,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:16:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:16:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:16:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-26 19:16:03,516 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 85 [2020-10-26 19:16:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:03,516 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-26 19:16:03,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:16:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-26 19:16:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:16:03,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:03,517 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:03,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:16:03,517 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1282139288, now seen corresponding path program 35 times [2020-10-26 19:16:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:03,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500746635] [2020-10-26 19:16:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:08,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:16:08,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:09,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:09,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:09,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:09,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500746635] [2020-10-26 19:16:09,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:09,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:16:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207509336] [2020-10-26 19:16:09,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:16:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:16:09,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:09,706 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 39 states. [2020-10-26 19:16:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:10,104 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-26 19:16:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:16:10,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-26 19:16:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:10,106 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:16:10,106 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:16:10,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:16:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:16:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:16:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-26 19:16:10,112 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 87 [2020-10-26 19:16:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:10,113 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-26 19:16:10,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:16:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-26 19:16:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:16:10,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:10,114 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:10,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:16:10,114 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 612025990, now seen corresponding path program 36 times [2020-10-26 19:16:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:10,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425986487] [2020-10-26 19:16:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:16:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:16,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:16,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:16,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425986487] [2020-10-26 19:16:16,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:16,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:16:16,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458443260] [2020-10-26 19:16:16,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:16:16,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:16,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:16:16,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:16,278 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 40 states. [2020-10-26 19:16:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:16,525 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-26 19:16:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:16:16,530 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-26 19:16:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:16,531 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:16:16,531 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:16:16,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:16:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:16:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:16:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-26 19:16:16,537 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 89 [2020-10-26 19:16:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:16,538 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-26 19:16:16,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:16:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-26 19:16:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:16:16,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:16,539 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:16,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:16:16,540 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -161275356, now seen corresponding path program 37 times [2020-10-26 19:16:16,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:16,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543760914] [2020-10-26 19:16:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:16:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:16:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543760914] [2020-10-26 19:16:22,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:22,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:16:22,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891669808] [2020-10-26 19:16:22,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:16:22,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:22,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:16:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:16:22,721 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 41 states. [2020-10-26 19:16:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:23,129 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-26 19:16:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:16:23,129 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-26 19:16:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:23,130 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:16:23,130 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:16:23,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:16:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:16:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:16:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:16:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-26 19:16:23,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2020-10-26 19:16:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:23,137 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-26 19:16:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:16:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-26 19:16:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:16:23,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:23,138 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:23,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:16:23,138 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash -274526654, now seen corresponding path program 38 times [2020-10-26 19:16:23,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:23,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361521500] [2020-10-26 19:16:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:16:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361521500] [2020-10-26 19:16:29,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:29,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:16:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830574608] [2020-10-26 19:16:29,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:16:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:16:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:16:29,366 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 42 states. [2020-10-26 19:16:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:29,723 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-26 19:16:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:16:29,723 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-26 19:16:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:29,724 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:16:29,724 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:16:29,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:16:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:16:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:16:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:16:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-26 19:16:29,730 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 93 [2020-10-26 19:16:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:29,730 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-26 19:16:29,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:16:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-26 19:16:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:16:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:29,732 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:29,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:16:29,732 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1734841632, now seen corresponding path program 39 times [2020-10-26 19:16:29,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:29,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715869589] [2020-10-26 19:16:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:34,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:16:34,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:35,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715869589] [2020-10-26 19:16:35,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:35,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:16:35,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49313782] [2020-10-26 19:16:35,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:16:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:16:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:16:35,997 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 43 states. [2020-10-26 19:16:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:36,329 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-26 19:16:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:16:36,330 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-26 19:16:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:36,331 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:16:36,331 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:16:36,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:16:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:16:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:16:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:16:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-26 19:16:36,338 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 95 [2020-10-26 19:16:36,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:36,338 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-26 19:16:36,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:16:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-26 19:16:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:16:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:36,340 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:36,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:16:36,340 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash -643229698, now seen corresponding path program 40 times [2020-10-26 19:16:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:36,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983119075] [2020-10-26 19:16:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:41,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:41,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:16:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:42,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:42,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:42,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983119075] [2020-10-26 19:16:42,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:42,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:16:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392002072] [2020-10-26 19:16:42,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:16:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:16:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:16:42,728 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 44 states. [2020-10-26 19:16:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:43,040 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-26 19:16:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:16:43,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-26 19:16:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:43,042 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:16:43,042 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:16:43,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:16:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:16:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:16:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:16:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-26 19:16:43,048 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 97 [2020-10-26 19:16:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:43,048 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-26 19:16:43,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:16:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-26 19:16:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:16:43,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:43,049 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:43,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:16:43,049 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash 423818652, now seen corresponding path program 41 times [2020-10-26 19:16:43,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:43,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121233124] [2020-10-26 19:16:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:16:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:48,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:16:48,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:16:49,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:49,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:49,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121233124] [2020-10-26 19:16:49,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:49,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:16:49,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148049090] [2020-10-26 19:16:49,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:16:49,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:16:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:16:49,528 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 45 states. [2020-10-26 19:16:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:49,855 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-26 19:16:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:16:49,856 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-26 19:16:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:49,857 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:16:49,857 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:16:49,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:16:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:16:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:16:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:16:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-26 19:16:49,864 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-10-26 19:16:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:49,864 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-26 19:16:49,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:16:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-26 19:16:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:16:49,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:49,865 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:49,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:16:49,866 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash -639900742, now seen corresponding path program 42 times [2020-10-26 19:16:49,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256964132] [2020-10-26 19:16:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:16:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:56,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256964132] [2020-10-26 19:16:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:16:56,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925534327] [2020-10-26 19:16:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:16:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:16:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:16:56,390 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 46 states. [2020-10-26 19:16:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:56,783 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-26 19:16:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:16:56,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-26 19:16:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:56,786 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:16:56,786 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:16:56,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:16:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:16:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:16:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:16:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-26 19:16:56,791 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 101 [2020-10-26 19:16:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:56,791 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-26 19:16:56,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:16:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-26 19:16:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:16:56,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:56,792 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:56,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:16:56,792 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash -672021928, now seen corresponding path program 43 times [2020-10-26 19:16:56,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:56,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006406469] [2020-10-26 19:16:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:17:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:03,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:03,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:03,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:03,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:03,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:03,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:03,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:03,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006406469] [2020-10-26 19:17:03,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:03,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:17:03,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907663607] [2020-10-26 19:17:03,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:17:03,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:03,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:17:03,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:17:03,335 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 47 states. [2020-10-26 19:17:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:03,811 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-26 19:17:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:17:03,811 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-26 19:17:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:03,813 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:17:03,813 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:17:03,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:17:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:17:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-26 19:17:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:17:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-26 19:17:03,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-26 19:17:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:03,819 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-26 19:17:03,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:17:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-26 19:17:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:17:03,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:03,820 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:03,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:17:03,820 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1475710602, now seen corresponding path program 44 times [2020-10-26 19:17:03,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:03,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798343893] [2020-10-26 19:17:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:03,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:17:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:10,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:10,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:10,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:10,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:10,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:10,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798343893] [2020-10-26 19:17:10,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:10,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:17:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719832786] [2020-10-26 19:17:10,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:17:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:17:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:17:10,500 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 48 states. [2020-10-26 19:17:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:10,790 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-26 19:17:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:17:10,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-26 19:17:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:10,792 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:17:10,792 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:17:10,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:17:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:17:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-26 19:17:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:17:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-26 19:17:10,798 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 105 [2020-10-26 19:17:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:10,799 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-26 19:17:10,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:17:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-26 19:17:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:17:10,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:10,800 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:10,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:17:10,800 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -726413036, now seen corresponding path program 45 times [2020-10-26 19:17:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:10,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371849578] [2020-10-26 19:17:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:10,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:10,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:17:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:17,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:17,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371849578] [2020-10-26 19:17:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:17:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656647690] [2020-10-26 19:17:17,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:17:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:17:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:17:17,608 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 49 states. [2020-10-26 19:17:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:18,078 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-26 19:17:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:17:18,079 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2020-10-26 19:17:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:18,080 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:17:18,080 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:17:18,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:17:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:17:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-26 19:17:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:17:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-26 19:17:18,085 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 107 [2020-10-26 19:17:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:18,086 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-26 19:17:18,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:17:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-26 19:17:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:17:18,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:18,087 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:18,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:17:18,087 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2089009458, now seen corresponding path program 46 times [2020-10-26 19:17:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:18,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820706110] [2020-10-26 19:17:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:17:23,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:23,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:17:23,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:17:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:17:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:24,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:24,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:24,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820706110] [2020-10-26 19:17:24,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:24,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:17:24,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609058462] [2020-10-26 19:17:24,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:17:24,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:17:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:17:24,873 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 50 states. [2020-10-26 19:17:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:25,208 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 19:17:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:17:25,208 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 109 [2020-10-26 19:17:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:25,210 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:17:25,210 INFO L226 Difference]: Without dead ends: 119 [2020-10-26 19:17:25,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:17:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-26 19:17:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-26 19:17:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:17:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-26 19:17:25,217 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2020-10-26 19:17:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:25,217 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-26 19:17:25,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:17:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-26 19:17:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:17:25,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:25,218 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:25,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:17:25,218 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1880629712, now seen corresponding path program 47 times [2020-10-26 19:17:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:25,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627540961] [2020-10-26 19:17:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:17:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:32,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:32,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627540961] [2020-10-26 19:17:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:32,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:17:32,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548617801] [2020-10-26 19:17:32,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:17:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:17:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:17:32,068 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 51 states. [2020-10-26 19:17:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:32,584 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-26 19:17:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:17:32,584 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 111 [2020-10-26 19:17:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:32,586 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:17:32,586 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:17:32,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:17:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:17:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-26 19:17:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:17:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-26 19:17:32,591 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 111 [2020-10-26 19:17:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:32,592 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-26 19:17:32,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:17:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-26 19:17:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:17:32,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:32,593 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:32,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:17:32,593 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -803810578, now seen corresponding path program 48 times [2020-10-26 19:17:32,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:32,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111349248] [2020-10-26 19:17:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:32,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:37,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:17:37,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:17:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:39,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111349248] [2020-10-26 19:17:39,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:39,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:17:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644369274] [2020-10-26 19:17:39,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:17:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:17:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:17:39,510 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 52 states. [2020-10-26 19:17:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:40,066 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-26 19:17:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:17:40,067 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 113 [2020-10-26 19:17:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:40,069 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:17:40,069 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:17:40,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:17:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:17:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-26 19:17:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:17:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-26 19:17:40,075 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 113 [2020-10-26 19:17:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:40,075 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-26 19:17:40,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:17:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-26 19:17:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:17:40,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:40,076 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:40,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:17:40,076 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash 724415628, now seen corresponding path program 49 times [2020-10-26 19:17:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:40,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247752914] [2020-10-26 19:17:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:17:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:46,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:46,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:46,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:46,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:46,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:47,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247752914] [2020-10-26 19:17:47,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:47,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:17:47,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125724535] [2020-10-26 19:17:47,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:17:47,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:47,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:17:47,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:17:47,004 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 53 states. [2020-10-26 19:17:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:47,559 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-26 19:17:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:17:47,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 115 [2020-10-26 19:17:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:47,561 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:17:47,562 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:17:47,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:17:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:17:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-26 19:17:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:17:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-26 19:17:47,567 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2020-10-26 19:17:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:47,568 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-26 19:17:47,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:17:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-26 19:17:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:17:47,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:47,569 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:47,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:17:47,569 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash 470984362, now seen corresponding path program 50 times [2020-10-26 19:17:47,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:47,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379897900] [2020-10-26 19:17:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:47,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:17:52,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 19:17:52,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:17:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:17:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:54,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379897900] [2020-10-26 19:17:54,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:54,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:17:54,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876895392] [2020-10-26 19:17:54,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:17:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:17:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:17:54,658 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 54 states. [2020-10-26 19:17:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:55,213 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-26 19:17:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:17:55,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 117 [2020-10-26 19:17:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:55,216 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:17:55,216 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:17:55,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:17:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:17:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-26 19:17:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:17:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-10-26 19:17:55,221 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 117 [2020-10-26 19:17:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:55,221 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-10-26 19:17:55,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:17:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-10-26 19:17:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:17:55,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:55,223 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:55,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:17:55,223 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1736673608, now seen corresponding path program 51 times [2020-10-26 19:17:55,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:55,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873205029] [2020-10-26 19:17:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking...