/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:02:33,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:02:33,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:02:33,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:02:33,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:02:33,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:02:33,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:02:33,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:02:33,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:02:33,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:02:33,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:02:33,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:02:33,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:02:33,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:02:33,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:02:33,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:02:33,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:02:33,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:02:33,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:02:33,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:02:33,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:02:33,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:02:33,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:02:33,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:02:33,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:02:33,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:02:33,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:02:33,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:02:33,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:02:33,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:02:33,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:02:33,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:02:33,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:02:33,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:02:33,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:02:33,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:02:33,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:02:33,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:02:33,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:02:33,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:02:33,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:02:33,157 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 [2020-10-28 15:02:33,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:02:33,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:02:33,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:02:33,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:02:33,215 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:02:33,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:02:33,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:02:33,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:02:33,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:02:33,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:02:33,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:02:33,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:02:33,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:02:33,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:02:33,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:02:33,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:02:33,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:02:33,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:02:33,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:02:33,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:02:33,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:02:33,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:02:33,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:02:33,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:02:33,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:02:33,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:02:33,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:02:33,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:02:33,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:02:33,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:02:33,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:02:33,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:02:33,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:02:33,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:02:33,660 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:02:33,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-28 15:02:33,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d8da84aa/f674448da90c456fa43d468127b411aa/FLAG92f8bb44e [2020-10-28 15:02:34,423 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:02:34,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-28 15:02:34,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d8da84aa/f674448da90c456fa43d468127b411aa/FLAG92f8bb44e [2020-10-28 15:02:34,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d8da84aa/f674448da90c456fa43d468127b411aa [2020-10-28 15:02:34,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:02:34,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:02:34,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:34,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:02:34,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:02:34,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:34" (1/1) ... [2020-10-28 15:02:34,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb2d0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:34, skipping insertion in model container [2020-10-28 15:02:34,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:34" (1/1) ... [2020-10-28 15:02:34,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:02:34,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:02:34,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:34,993 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:02:35,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:35,031 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:02:35,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35 WrapperNode [2020-10-28 15:02:35,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:35,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:02:35,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:02:35,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:02:35,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (1/1) ... [2020-10-28 15:02:35,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:02:35,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:02:35,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:02:35,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:02:35,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (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 [2020-10-28 15:02:35,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:02:35,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:02:35,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:02:35,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:02:35,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:02:35,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:02:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:02:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:02:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:02:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:02:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:02:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:02:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:02:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:02:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:02:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:02:35,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:02:35,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:02:35,627 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:02:35,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:35 BoogieIcfgContainer [2020-10-28 15:02:35,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:02:35,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:02:35,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:02:35,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:02:35,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:02:34" (1/3) ... [2020-10-28 15:02:35,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230bf3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:35, skipping insertion in model container [2020-10-28 15:02:35,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:35" (2/3) ... [2020-10-28 15:02:35,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230bf3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:35, skipping insertion in model container [2020-10-28 15:02:35,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:35" (3/3) ... [2020-10-28 15:02:35,643 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2020-10-28 15:02:35,657 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:02:35,662 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:02:35,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:02:35,723 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:02:35,724 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:02:35,724 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:02:35,724 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:02:35,724 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:02:35,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:02:35,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:02:35,725 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:02:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:02:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:02:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:35,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:35,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1042563823, now seen corresponding path program 1 times [2020-10-28 15:02:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:35,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500554927] [2020-10-28 15:02:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:02:36,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 15:02:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:36,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:02:36,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:36,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 15:02:36,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:36,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500554927] [2020-10-28 15:02:36,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:36,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:02:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132397835] [2020-10-28 15:02:36,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:02:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:36,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:02:36,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:02:36,282 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 15:02:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:36,361 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-28 15:02:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:02:36,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:02:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:36,371 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:02:36,372 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:02:36,375 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 [2020-10-28 15:02:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:02:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:02:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:02:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 15:02:36,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-28 15:02:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:36,420 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 15:02:36,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:02:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 15:02:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:02:36,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:36,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:36,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:02:36,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash 757461605, now seen corresponding path program 1 times [2020-10-28 15:02:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:36,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449672717] [2020-10-28 15:02:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:02:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 15:02:36,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:36,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:02:36,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:36,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:02:36,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:36,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:36,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449672717] [2020-10-28 15:02:36,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:36,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:02:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493514972] [2020-10-28 15:02:36,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:02:36,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:02:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:02:36,680 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 15:02:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:36,802 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-28 15:02:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:02:36,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:02:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:36,804 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:02:36,804 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:02:36,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:02:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:02:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:02:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 15:02:36,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-28 15:02:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:36,815 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 15:02:36,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:02:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 15:02:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:02:36,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:36,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:36,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:02:36,816 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 32255874, now seen corresponding path program 1 times [2020-10-28 15:02:36,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:36,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442783478] [2020-10-28 15:02:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:02:36,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 15:02:36,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:02:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:02:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:37,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:02:37,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:37,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:37,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:37,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:37,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442783478] [2020-10-28 15:02:37,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:37,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:02:37,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674546093] [2020-10-28 15:02:37,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:02:37,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:02:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:02:37,019 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-28 15:02:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:37,136 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-28 15:02:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:02:37,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 15:02:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:37,138 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:02:37,138 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:02:37,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:02:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-28 15:02:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:02:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-28 15:02:37,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-28 15:02:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:37,148 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-28 15:02:37,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:02:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-28 15:02:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:02:37,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:37,149 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:37,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:02:37,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1915096291, now seen corresponding path program 1 times [2020-10-28 15:02:37,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:37,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918768604] [2020-10-28 15:02:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:02:37,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:37,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 15:02:37,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:02:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:02:37,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:02:37,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:37,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:37,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 15:02:37,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:37,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:02:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:37,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918768604] [2020-10-28 15:02:37,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:37,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:02:37,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847470074] [2020-10-28 15:02:37,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:02:37,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:02:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:37,449 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-28 15:02:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:37,659 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:02:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:02:37,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 15:02:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:37,661 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:02:37,661 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 15:02:37,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 15:02:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 15:02:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:02:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:02:37,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-28 15:02:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:37,679 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:02:37,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:02:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:02:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:02:37,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:37,680 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:37,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:02:37,680 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash -321758790, now seen corresponding path program 2 times [2020-10-28 15:02:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:37,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449873199] [2020-10-28 15:02:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:02:37,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:37,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 15:02:37,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:02:37,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:37,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449873199] [2020-10-28 15:02:38,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:38,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:02:38,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545700265] [2020-10-28 15:02:38,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:38,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:38,023 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 15:02:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:38,242 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-28 15:02:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:38,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:02:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:38,244 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:02:38,244 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:02:38,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:02:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:02:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:02:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 15:02:38,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 15:02:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:38,252 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 15:02:38,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 15:02:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:02:38,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:38,253 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:38,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:02:38,253 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1867222295, now seen corresponding path program 3 times [2020-10-28 15:02:38,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:38,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963098324] [2020-10-28 15:02:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:02:38,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:38,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 15:02:38,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:02:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:02:38,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:02:38,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:38,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:38,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:02:38,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:02:38,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963098324] [2020-10-28 15:02:38,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:38,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:02:38,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390396885] [2020-10-28 15:02:38,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:02:38,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:02:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:38,480 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-28 15:02:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:38,648 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-28 15:02:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:02:38,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:02:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:38,651 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:02:38,651 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:02:38,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:02:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 15:02:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:02:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 15:02:38,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-28 15:02:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:38,659 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 15:02:38,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:02:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 15:02:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:02:38,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:38,660 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:38,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:02:38,661 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash 551042930, now seen corresponding path program 4 times [2020-10-28 15:02:38,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:38,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614450299] [2020-10-28 15:02:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:02:38,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:38,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 15:02:38,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:02:38,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:38,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:38,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:38,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:38,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:38,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:38,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:38,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:02:38,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614450299] [2020-10-28 15:02:38,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:38,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137140037] [2020-10-28 15:02:38,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:38,937 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-28 15:02:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:39,114 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:02:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:39,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 15:02:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:39,115 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:02:39,115 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:02:39,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:02:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 15:02:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:02:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 15:02:39,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-28 15:02:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:39,123 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 15:02:39,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 15:02:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:02:39,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:39,124 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:39,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:02:39,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1835107249, now seen corresponding path program 5 times [2020-10-28 15:02:39,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:39,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571854830] [2020-10-28 15:02:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:02:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:39,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:39,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:39,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:39,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:02:39,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571854830] [2020-10-28 15:02:39,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:39,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112211984] [2020-10-28 15:02:39,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:39,425 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-28 15:02:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:39,644 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-28 15:02:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:39,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-28 15:02:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:39,645 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:02:39,646 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:02:39,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:02:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:02:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:02:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 15:02:39,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-28 15:02:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:39,653 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 15:02:39,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 15:02:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:02:39,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:39,654 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:39,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:02:39,655 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1412893204, now seen corresponding path program 6 times [2020-10-28 15:02:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:39,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503684812] [2020-10-28 15:02:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:02:39,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:39,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:39,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:39,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:39,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:39,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:39,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:02:39,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503684812] [2020-10-28 15:02:39,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:39,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:02:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70426687] [2020-10-28 15:02:39,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:39,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:39,945 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 15:02:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:40,084 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-28 15:02:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:40,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-28 15:02:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:40,085 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:02:40,085 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:02:40,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:02:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 15:02:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:02:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-28 15:02:40,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2020-10-28 15:02:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:40,093 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-28 15:02:40,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-28 15:02:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:02:40,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:40,094 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:40,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:02:40,094 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash 866043655, now seen corresponding path program 7 times [2020-10-28 15:02:40,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:40,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585716967] [2020-10-28 15:02:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:40,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:02:40,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:40,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:02:40,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:40,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:40,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:40,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:02:40,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:40,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:02:40,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585716967] [2020-10-28 15:02:40,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:40,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:02:40,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108222211] [2020-10-28 15:02:40,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:02:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:02:40,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:40,570 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-10-28 15:02:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:40,851 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 15:02:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:02:40,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-28 15:02:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:40,853 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:02:40,853 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:02:40,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:02:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 15:02:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:02:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 15:02:40,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-10-28 15:02:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:40,860 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 15:02:40,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:02:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 15:02:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:02:40,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:40,862 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:40,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:02:40,862 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:40,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1502161444, now seen corresponding path program 8 times [2020-10-28 15:02:40,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:40,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976244959] [2020-10-28 15:02:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:41,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:41,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:02:41,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:41,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-28 15:02:41,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:41,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:41,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:02:41,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:41,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:02:41,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:41,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:41,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:41,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:41,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:41,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:02:41,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:41,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:41,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:41,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:02:41,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976244959] [2020-10-28 15:02:41,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:41,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:02:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029483471] [2020-10-28 15:02:41,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:02:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:02:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:02:41,361 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-10-28 15:02:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:41,662 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 15:02:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:02:41,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 15:02:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:41,663 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:02:41,663 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:02:41,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:02:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 15:02:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:02:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-28 15:02:41,677 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2020-10-28 15:02:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:41,677 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-28 15:02:41,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:02:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-28 15:02:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:02:41,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:41,682 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:41,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:02:41,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1368966655, now seen corresponding path program 9 times [2020-10-28 15:02:41,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:41,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986336270] [2020-10-28 15:02:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:41,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:42,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:42,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:02:42,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-28 15:02:42,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:42,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:02:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:02:42,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:42,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:42,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:42,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:42,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:42,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:42,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:42,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:42,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:42,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:42,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 15:02:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986336270] [2020-10-28 15:02:42,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:42,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643891555] [2020-10-28 15:02:42,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:42,179 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 7 states. [2020-10-28 15:02:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:42,368 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-28 15:02:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:42,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-28 15:02:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:42,369 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:02:42,369 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:02:42,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:02:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 15:02:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:02:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 15:02:42,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2020-10-28 15:02:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:42,385 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 15:02:42,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 15:02:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:02:42,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:42,389 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:42,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:02:42,389 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 129784284, now seen corresponding path program 10 times [2020-10-28 15:02:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:42,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916749984] [2020-10-28 15:02:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:42,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:42,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:02:42,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:02:42,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:43,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:43,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:43,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:43,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:43,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:43,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:43,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:43,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:43,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:02:43,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916749984] [2020-10-28 15:02:43,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:43,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:02:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118321128] [2020-10-28 15:02:43,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:02:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:02:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:43,067 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-10-28 15:02:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:43,415 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 15:02:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:02:43,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 15:02:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:43,418 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:02:43,418 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:02:43,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:02:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 15:02:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:02:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 15:02:43,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2020-10-28 15:02:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:43,428 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 15:02:43,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:02:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 15:02:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:02:43,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:43,429 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:43,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:02:43,429 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1658506439, now seen corresponding path program 11 times [2020-10-28 15:02:43,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:43,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561830533] [2020-10-28 15:02:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:02:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:02:44,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:44,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:44,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:44,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:44,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 15:02:44,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561830533] [2020-10-28 15:02:44,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:44,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:44,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709084358] [2020-10-28 15:02:44,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:44,122 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-28 15:02:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:44,380 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 15:02:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:44,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 15:02:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:44,382 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:02:44,382 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:02:44,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:02:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 15:02:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:02:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 15:02:44,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2020-10-28 15:02:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:44,391 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 15:02:44,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 15:02:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:02:44,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:44,392 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:44,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:02:44,392 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1054926100, now seen corresponding path program 12 times [2020-10-28 15:02:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:44,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739606599] [2020-10-28 15:02:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:45,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:02:45,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-28 15:02:45,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:45,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:02:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:02:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:45,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:45,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:02:45,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739606599] [2020-10-28 15:02:45,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:45,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:02:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538869513] [2020-10-28 15:02:45,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:02:45,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:02:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:02:45,237 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 12 states. [2020-10-28 15:02:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:45,610 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-28 15:02:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:02:45,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 15:02:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:45,612 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:02:45,612 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:02:45,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:02:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:02:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 15:02:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:02:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 15:02:45,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 39 [2020-10-28 15:02:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:45,621 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 15:02:45,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:02:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 15:02:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:02:45,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:45,622 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:45,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:02:45,622 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash -682375183, now seen corresponding path program 13 times [2020-10-28 15:02:45,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:45,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242547662] [2020-10-28 15:02:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:45,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:46,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:46,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:02:46,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:46,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-28 15:02:46,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:46,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:02:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:46,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:02:46,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:46,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:46,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:46,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:46,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:46,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:46,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:46,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:46,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:46,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:46,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:02:46,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242547662] [2020-10-28 15:02:46,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:46,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:02:46,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799473053] [2020-10-28 15:02:46,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:02:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:02:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:46,477 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 13 states. [2020-10-28 15:02:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:46,921 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-28 15:02:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:02:46,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 15:02:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:46,924 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:02:46,924 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:02:46,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:02:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:02:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 15:02:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:02:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-28 15:02:46,936 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 41 [2020-10-28 15:02:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:46,936 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-28 15:02:46,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:02:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-28 15:02:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:02:46,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:46,937 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:46,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:02:46,938 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 513369998, now seen corresponding path program 14 times [2020-10-28 15:02:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:46,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011733818] [2020-10-28 15:02:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:47,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:02:47,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:47,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-28 15:02:47,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:47,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:47,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:02:47,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:02:47,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:02:47,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:47,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:47,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:47,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:47,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:47,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 25 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 15:02:47,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011733818] [2020-10-28 15:02:47,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:47,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:02:47,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331276001] [2020-10-28 15:02:47,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:02:47,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:02:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:47,649 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 9 states. [2020-10-28 15:02:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:47,928 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-28 15:02:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:02:47,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 15:02:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:47,930 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:02:47,930 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:02:47,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:02:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 15:02:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:02:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-28 15:02:47,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 43 [2020-10-28 15:02:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:47,939 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-28 15:02:47,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:02:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-28 15:02:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:02:47,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:47,940 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:47,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:02:47,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash 874076201, now seen corresponding path program 15 times [2020-10-28 15:02:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:47,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530215222] [2020-10-28 15:02:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:47,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:47,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:48,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:48,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:02:48,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:48,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:02:48,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:49,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:49,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:49,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:49,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:49,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:49,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:02:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530215222] [2020-10-28 15:02:49,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:49,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:02:49,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856045776] [2020-10-28 15:02:49,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:02:49,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:02:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:02:49,016 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 14 states. [2020-10-28 15:02:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:49,493 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-28 15:02:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:02:49,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-28 15:02:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:49,495 INFO L225 Difference]: With dead ends: 68 [2020-10-28 15:02:49,495 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:02:49,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:02:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:02:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 15:02:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:02:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 15:02:49,511 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 45 [2020-10-28 15:02:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:49,511 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 15:02:49,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:02:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 15:02:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:02:49,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:49,513 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:49,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:02:49,513 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash 438034758, now seen corresponding path program 16 times [2020-10-28 15:02:49,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538889285] [2020-10-28 15:02:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:49,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:50,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:02:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-10-28 15:02:50,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:50,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:02:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:02:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:02:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:50,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:50,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:50,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:50,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:50,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:50,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:50,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:50,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:50,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:50,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 15:02:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538889285] [2020-10-28 15:02:50,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:50,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:02:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500976992] [2020-10-28 15:02:50,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:02:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:02:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:02:50,702 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2020-10-28 15:02:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:50,986 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-28 15:02:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:02:50,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-28 15:02:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:50,987 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:02:50,988 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:02:50,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:02:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 15:02:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:02:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-28 15:02:51,000 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 47 [2020-10-28 15:02:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:51,001 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-28 15:02:51,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:02:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-28 15:02:51,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:02:51,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:51,001 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:51,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:02:51,002 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1491354593, now seen corresponding path program 17 times [2020-10-28 15:02:51,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:51,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275216343] [2020-10-28 15:02:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:51,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:52,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:52,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:02:52,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:02:52,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:52,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:52,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:52,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:52,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:52,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:52,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:52,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:52,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:52,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:52,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:02:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275216343] [2020-10-28 15:02:52,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:52,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:02:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944279224] [2020-10-28 15:02:52,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:02:52,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:52,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:02:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:52,315 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 15 states. [2020-10-28 15:02:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:52,868 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-28 15:02:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:02:52,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 15:02:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:52,870 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:02:52,870 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:02:52,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:02:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:02:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 15:02:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:02:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 15:02:52,887 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 49 [2020-10-28 15:02:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:52,889 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 15:02:52,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:02:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 15:02:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:02:52,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:52,892 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:52,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:02:52,893 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash -99420546, now seen corresponding path program 18 times [2020-10-28 15:02:52,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:52,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967407721] [2020-10-28 15:02:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:52,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:54,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:54,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:02:54,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:54,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-28 15:02:54,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:54,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:02:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:02:54,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:54,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:54,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:54,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:54,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:54,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:54,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:54,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:54,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:02:54,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967407721] [2020-10-28 15:02:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:02:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514356035] [2020-10-28 15:02:54,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:02:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:02:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:02:54,525 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 16 states. [2020-10-28 15:02:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:55,152 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-28 15:02:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:02:55,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-28 15:02:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:55,153 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:02:55,153 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:02:55,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:02:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:02:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 15:02:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:02:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-28 15:02:55,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 51 [2020-10-28 15:02:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:55,165 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-28 15:02:55,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:02:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-28 15:02:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:02:55,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:55,166 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:55,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:02:55,166 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash 174028251, now seen corresponding path program 19 times [2020-10-28 15:02:55,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:55,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154030290] [2020-10-28 15:02:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:56,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:56,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:02:56,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:02:56,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:56,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:56,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:56,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:56,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:56,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:56,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 49 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 15:02:56,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154030290] [2020-10-28 15:02:56,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:56,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:02:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331564984] [2020-10-28 15:02:56,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:02:56,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:02:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:56,608 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 11 states. [2020-10-28 15:02:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:56,943 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-28 15:02:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:02:56,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-28 15:02:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:56,947 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:02:56,947 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:02:56,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:02:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 15:02:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:02:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-28 15:02:56,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 53 [2020-10-28 15:02:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-28 15:02:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:02:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-28 15:02:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:02:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:56,956 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:56,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:02:56,956 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1184171830, now seen corresponding path program 20 times [2020-10-28 15:02:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:56,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702558549] [2020-10-28 15:02:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:57,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:58,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1559 [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:02:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:02:58,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:58,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:58,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:58,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:58,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:58,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:02:58,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702558549] [2020-10-28 15:02:58,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:58,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:02:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161832738] [2020-10-28 15:02:58,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:02:58,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:02:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:58,763 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 17 states. [2020-10-28 15:02:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:59,406 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-28 15:02:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:02:59,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-28 15:02:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:59,408 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:02:59,408 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:02:59,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:02:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:02:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 15:02:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:02:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 15:02:59,415 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 55 [2020-10-28 15:02:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:59,416 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 15:02:59,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:02:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 15:02:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:02:59,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:59,417 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:59,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:02:59,417 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1403555859, now seen corresponding path program 21 times [2020-10-28 15:02:59,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:59,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029783757] [2020-10-28 15:02:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:59,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:00,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:00,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:03:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:01,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:01,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:01,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:01,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:01,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:03:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029783757] [2020-10-28 15:03:01,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:01,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:03:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416288140] [2020-10-28 15:03:01,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:03:01,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:03:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:03:01,215 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 18 states. [2020-10-28 15:03:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:01,919 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2020-10-28 15:03:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:03:01,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-28 15:03:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:01,921 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:03:01,921 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:03:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:03:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:03:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 15:03:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 15:03:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-28 15:03:01,939 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 57 [2020-10-28 15:03:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:01,939 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-28 15:03:01,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:03:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-28 15:03:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:03:01,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:01,941 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:01,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:03:01,942 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1778210224, now seen corresponding path program 22 times [2020-10-28 15:03:01,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:01,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858058559] [2020-10-28 15:03:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1526 [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:03,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:03:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:03:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:03:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:03,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:03,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:03,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:03,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:03,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:03,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:03,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:03,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:03:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 255 proven. 64 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:03:03,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858058559] [2020-10-28 15:03:03,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:03,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:03:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4076271] [2020-10-28 15:03:03,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:03:03,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:03:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:03:03,626 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 12 states. [2020-10-28 15:03:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:04,069 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-28 15:03:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:03:04,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-28 15:03:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:04,070 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:03:04,070 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:03:04,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:03:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:03:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 15:03:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:03:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-28 15:03:04,077 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 59 [2020-10-28 15:03:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:04,078 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-28 15:03:04,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:03:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-28 15:03:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 15:03:04,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:04,079 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:04,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:03:04,079 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash 909788619, now seen corresponding path program 23 times [2020-10-28 15:03:04,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:04,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247514953] [2020-10-28 15:03:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:04,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:06,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:06,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 15:03:06,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:03:06,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:06,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:06,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:06,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:06,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:06,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:06,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:06,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:06,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:03:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:03:06,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247514953] [2020-10-28 15:03:06,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:06,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:03:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348642558] [2020-10-28 15:03:06,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:03:06,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:03:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:03:06,436 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 19 states. [2020-10-28 15:03:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:07,279 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2020-10-28 15:03:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:03:07,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-10-28 15:03:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:07,280 INFO L225 Difference]: With dead ends: 90 [2020-10-28 15:03:07,281 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:03:07,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:03:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:03:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 15:03:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 15:03:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-28 15:03:07,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 61 [2020-10-28 15:03:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:07,289 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-28 15:03:07,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:03:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-28 15:03:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 15:03:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:07,290 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:07,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:03:07,291 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:07,294 INFO L82 PathProgramCache]: Analyzing trace with hash -481757976, now seen corresponding path program 24 times [2020-10-28 15:03:07,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:07,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836292629] [2020-10-28 15:03:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:07,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:09,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:09,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 15:03:09,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-28 15:03:09,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:09,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:03:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:03:09,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:03:09,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:09,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:09,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:09,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:09,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 81 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-28 15:03:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836292629] [2020-10-28 15:03:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:09,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:03:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152833425] [2020-10-28 15:03:09,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:03:09,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:03:09,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:03:09,486 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 13 states. [2020-10-28 15:03:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:09,937 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-28 15:03:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:03:09,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-28 15:03:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:09,939 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:03:09,939 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:03:09,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:03:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:03:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 15:03:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 15:03:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-28 15:03:09,947 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 63 [2020-10-28 15:03:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:09,947 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-28 15:03:09,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:03:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-28 15:03:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 15:03:09,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:09,948 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:09,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:03:09,948 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1961167101, now seen corresponding path program 25 times [2020-10-28 15:03:09,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:09,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370123666] [2020-10-28 15:03:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:09,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:10,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:11,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:11,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:03:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:12,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:03:12,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370123666] [2020-10-28 15:03:12,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:12,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:03:12,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150028437] [2020-10-28 15:03:12,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:03:12,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:12,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:03:12,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:03:12,041 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 20 states. [2020-10-28 15:03:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:12,859 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2020-10-28 15:03:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:03:12,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-28 15:03:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:12,861 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:03:12,861 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 15:03:12,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:03:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 15:03:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 15:03:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 15:03:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-28 15:03:12,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 65 [2020-10-28 15:03:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:12,870 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-28 15:03:12,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:03:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-28 15:03:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 15:03:12,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:12,871 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:12,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:03:12,871 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1529688160, now seen corresponding path program 26 times [2020-10-28 15:03:12,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:12,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499516664] [2020-10-28 15:03:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:12,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:14,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:14,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:03:14,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:14,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:14,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:14,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:03:14,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499516664] [2020-10-28 15:03:14,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:14,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:03:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871189251] [2020-10-28 15:03:14,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:03:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:03:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:03:14,814 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 21 states. [2020-10-28 15:03:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:15,657 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-28 15:03:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:03:15,657 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-28 15:03:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:15,658 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:03:15,658 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:03:15,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:03:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:03:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 15:03:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:03:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-28 15:03:15,666 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 67 [2020-10-28 15:03:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:15,666 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-28 15:03:15,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:03:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-28 15:03:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:03:15,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:15,667 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:15,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:03:15,668 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash 804713725, now seen corresponding path program 27 times [2020-10-28 15:03:15,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:15,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333349281] [2020-10-28 15:03:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1731 [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:03:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:03:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:03:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:17,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:17,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 100 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 15:03:17,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333349281] [2020-10-28 15:03:17,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:17,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:03:17,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538902143] [2020-10-28 15:03:17,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:03:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:03:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:03:17,576 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 14 states. [2020-10-28 15:03:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:18,109 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-28 15:03:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:03:18,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-28 15:03:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:18,110 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:03:18,111 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:03:18,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:03:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:03:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 15:03:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 15:03:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-28 15:03:18,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 69 [2020-10-28 15:03:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:18,119 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-28 15:03:18,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:03:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-28 15:03:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 15:03:18,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:18,120 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:18,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:03:18,121 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1682523608, now seen corresponding path program 28 times [2020-10-28 15:03:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:18,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818936165] [2020-10-28 15:03:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:18,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2046 [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:20,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:03:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:03:20,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:20,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:20,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:20,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:20,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:20,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:20,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:20,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 399 proven. 342 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 15:03:20,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818936165] [2020-10-28 15:03:20,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:20,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:03:20,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698606976] [2020-10-28 15:03:20,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:03:20,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:20,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:03:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:03:20,539 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 22 states. [2020-10-28 15:03:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:21,553 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-28 15:03:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:03:21,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-28 15:03:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:21,555 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:03:21,555 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 15:03:21,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:03:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 15:03:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-28 15:03:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 15:03:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-10-28 15:03:21,562 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 71 [2020-10-28 15:03:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:21,563 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-10-28 15:03:21,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:03:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-10-28 15:03:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 15:03:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:21,564 INFO L422 BasicCegarLoop]: trace histogram [30, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:21,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:03:21,564 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -873368395, now seen corresponding path program 29 times [2020-10-28 15:03:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:21,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690821526] [2020-10-28 15:03:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:21,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2270 [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:23,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:03:23,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 15:03:23,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:03:23,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:24,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 437 proven. 121 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-28 15:03:24,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690821526] [2020-10-28 15:03:24,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:24,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:03:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96108061] [2020-10-28 15:03:24,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:03:24,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:03:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:03:24,033 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 15 states. [2020-10-28 15:03:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:24,600 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-28 15:03:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:03:24,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-28 15:03:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:24,602 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:03:24,602 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:03:24,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:03:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:03:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 15:03:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 15:03:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-28 15:03:24,613 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 73 [2020-10-28 15:03:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:24,614 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-28 15:03:24,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:03:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-28 15:03:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 15:03:24,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:24,615 INFO L422 BasicCegarLoop]: trace histogram [31, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:24,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:03:24,615 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash -341657712, now seen corresponding path program 30 times [2020-10-28 15:03:24,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:24,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339089850] [2020-10-28 15:03:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:24,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:27,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:27,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 15:03:27,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:27,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2786 [2020-10-28 15:03:27,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:27,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:03:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:03:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:27,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 460 proven. 380 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 15:03:27,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339089850] [2020-10-28 15:03:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:27,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:03:27,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500111641] [2020-10-28 15:03:27,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:03:27,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:03:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:03:27,773 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 23 states. [2020-10-28 15:03:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:28,793 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-10-28 15:03:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:03:28,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-28 15:03:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:28,794 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:03:28,794 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:03:28,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:03:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:03:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 15:03:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 15:03:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-28 15:03:28,804 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 75 [2020-10-28 15:03:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:28,804 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-28 15:03:28,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:03:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-28 15:03:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 15:03:28,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:28,805 INFO L422 BasicCegarLoop]: trace histogram [32, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:28,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:03:28,805 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash -743559187, now seen corresponding path program 31 times [2020-10-28 15:03:28,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:28,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302241576] [2020-10-28 15:03:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:28,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:31,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:03:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:31,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:31,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:31,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 483 proven. 420 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 15:03:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302241576] [2020-10-28 15:03:31,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:31,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:03:31,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456621364] [2020-10-28 15:03:31,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:03:31,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:03:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:03:31,635 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 24 states. [2020-10-28 15:03:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:32,807 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2020-10-28 15:03:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:03:32,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-28 15:03:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:32,809 INFO L225 Difference]: With dead ends: 112 [2020-10-28 15:03:32,810 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 15:03:32,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:03:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 15:03:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 15:03:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 15:03:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-28 15:03:32,818 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 77 [2020-10-28 15:03:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:32,819 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-28 15:03:32,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:03:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-28 15:03:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 15:03:32,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:32,820 INFO L422 BasicCegarLoop]: trace histogram [33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:32,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:03:32,820 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -423820022, now seen corresponding path program 32 times [2020-10-28 15:03:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:32,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4336291] [2020-10-28 15:03:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:32,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:35,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:35,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2640 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:03:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:35,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:35,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:35,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:35,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:35,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 525 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-28 15:03:35,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4336291] [2020-10-28 15:03:35,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:35,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:03:35,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267258639] [2020-10-28 15:03:35,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:03:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:03:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:03:35,680 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 16 states. [2020-10-28 15:03:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:36,303 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-28 15:03:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:03:36,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-28 15:03:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:36,305 INFO L225 Difference]: With dead ends: 90 [2020-10-28 15:03:36,305 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:03:36,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:03:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:03:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 15:03:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:03:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-28 15:03:36,312 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 79 [2020-10-28 15:03:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:36,312 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-28 15:03:36,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:03:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-28 15:03:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 15:03:36,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:36,313 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:36,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:03:36,314 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2117368155, now seen corresponding path program 33 times [2020-10-28 15:03:36,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:36,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566233774] [2020-10-28 15:03:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:39,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:39,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 15:03:39,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:39,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2774 [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:03:39,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:39,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:39,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:39,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:39,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:39,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:39,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 550 proven. 462 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 15:03:39,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566233774] [2020-10-28 15:03:39,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:39,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:03:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328401305] [2020-10-28 15:03:39,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:03:39,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:03:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:03:39,530 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 25 states. [2020-10-28 15:03:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:40,540 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2020-10-28 15:03:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:03:40,541 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-28 15:03:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:40,542 INFO L225 Difference]: With dead ends: 118 [2020-10-28 15:03:40,542 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 15:03:40,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:03:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 15:03:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 15:03:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 15:03:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-28 15:03:40,549 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 81 [2020-10-28 15:03:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:40,550 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-28 15:03:40,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:03:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-28 15:03:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 15:03:40,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:40,550 INFO L422 BasicCegarLoop]: trace histogram [35, 22, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:40,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:03:40,551 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 419464514, now seen corresponding path program 34 times [2020-10-28 15:03:40,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:40,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056693641] [2020-10-28 15:03:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:40,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:43,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3269 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:03:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:44,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:44,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:44,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:44,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 575 proven. 506 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 15:03:44,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056693641] [2020-10-28 15:03:44,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:44,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:03:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938933573] [2020-10-28 15:03:44,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:03:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:03:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:03:44,315 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 26 states. [2020-10-28 15:03:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:45,588 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2020-10-28 15:03:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:03:45,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-28 15:03:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:45,590 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:03:45,590 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 15:03:45,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:03:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 15:03:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 15:03:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 15:03:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2020-10-28 15:03:45,598 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 83 [2020-10-28 15:03:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:45,599 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2020-10-28 15:03:45,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:03:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2020-10-28 15:03:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 15:03:45,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:45,600 INFO L422 BasicCegarLoop]: trace histogram [36, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:45,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:03:45,600 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1225764705, now seen corresponding path program 35 times [2020-10-28 15:03:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:45,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296486010] [2020-10-28 15:03:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:45,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:48,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:48,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 15:03:48,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3362 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:03:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:49,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:49,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:49,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:49,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:49,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:49,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:49,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:49,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 621 proven. 169 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-28 15:03:49,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296486010] [2020-10-28 15:03:49,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:49,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:03:49,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130534582] [2020-10-28 15:03:49,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:03:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:03:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:03:49,184 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 17 states. [2020-10-28 15:03:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:49,857 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-28 15:03:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:03:49,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-10-28 15:03:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:49,858 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:03:49,858 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:03:49,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:03:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:03:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 15:03:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 15:03:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2020-10-28 15:03:49,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 85 [2020-10-28 15:03:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:49,869 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2020-10-28 15:03:49,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:03:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2020-10-28 15:03:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 15:03:49,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:49,870 INFO L422 BasicCegarLoop]: trace histogram [37, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:49,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:03:49,870 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash 307904762, now seen corresponding path program 36 times [2020-10-28 15:03:49,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:49,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367117441] [2020-10-28 15:03:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:53,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3495 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:03:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:53,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:53,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:53,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:53,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 648 proven. 552 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 15:03:53,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367117441] [2020-10-28 15:03:53,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:53,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:03:53,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549497536] [2020-10-28 15:03:53,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:03:53,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:03:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:03:53,912 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand 27 states. [2020-10-28 15:03:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:55,270 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2020-10-28 15:03:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:03:55,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2020-10-28 15:03:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:55,272 INFO L225 Difference]: With dead ends: 126 [2020-10-28 15:03:55,272 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 15:03:55,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:03:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 15:03:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 15:03:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 15:03:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-10-28 15:03:55,281 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 87 [2020-10-28 15:03:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:55,281 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-10-28 15:03:55,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:03:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-10-28 15:03:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 15:03:55,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:55,282 INFO L422 BasicCegarLoop]: trace histogram [38, 24, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:55,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:03:55,282 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1384846807, now seen corresponding path program 37 times [2020-10-28 15:03:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:55,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019073953] [2020-10-28 15:03:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:55,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:59,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:59,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 15:03:59,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:03:59,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3876 [2020-10-28 15:03:59,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:59,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:03:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 15:03:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:03:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:03:59,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:59,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:59,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:59,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 696 proven. 196 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-28 15:03:59,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019073953] [2020-10-28 15:03:59,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:59,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:03:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415993409] [2020-10-28 15:03:59,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:03:59,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:03:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:03:59,418 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 18 states. [2020-10-28 15:04:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:00,120 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-28 15:04:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:04:00,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-28 15:04:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:00,122 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:04:00,122 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 15:04:00,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:04:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 15:04:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 15:04:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 15:04:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-10-28 15:04:00,132 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 89 [2020-10-28 15:04:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:00,132 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-10-28 15:04:00,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:04:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-10-28 15:04:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 15:04:00,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:00,133 INFO L422 BasicCegarLoop]: trace histogram [39, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:00,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:04:00,134 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:00,134 INFO L82 PathProgramCache]: Analyzing trace with hash 844666930, now seen corresponding path program 38 times [2020-10-28 15:04:00,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:00,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479539365] [2020-10-28 15:04:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:04,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:04,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4295 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:04:04,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:04,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:04,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:04,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 725 proven. 600 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 15:04:04,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479539365] [2020-10-28 15:04:04,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:04,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:04:04,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156015902] [2020-10-28 15:04:04,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:04:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:04:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:04:04,967 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 28 states. [2020-10-28 15:04:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:06,332 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2020-10-28 15:04:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:04:06,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-28 15:04:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:06,334 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:04:06,334 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 15:04:06,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:04:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 15:04:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-28 15:04:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 15:04:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-28 15:04:06,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 91 [2020-10-28 15:04:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:06,342 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-28 15:04:06,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:04:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-28 15:04:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 15:04:06,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:06,343 INFO L422 BasicCegarLoop]: trace histogram [40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:06,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:04:06,344 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1842760049, now seen corresponding path program 39 times [2020-10-28 15:04:06,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:06,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486512841] [2020-10-28 15:04:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:10,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:10,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 15:04:10,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4451 [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 15:04:10,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:11,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:11,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:11,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:11,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 754 proven. 650 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 15:04:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486512841] [2020-10-28 15:04:11,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:11,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:04:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089373138] [2020-10-28 15:04:11,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:04:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:04:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:04:11,364 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 29 states. [2020-10-28 15:04:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:12,778 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2020-10-28 15:04:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:04:12,779 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 93 [2020-10-28 15:04:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:12,780 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:04:12,780 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 15:04:12,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:04:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 15:04:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-28 15:04:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 15:04:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-10-28 15:04:12,789 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 93 [2020-10-28 15:04:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:12,789 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-10-28 15:04:12,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:04:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-10-28 15:04:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 15:04:12,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:12,791 INFO L422 BasicCegarLoop]: trace histogram [41, 26, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:12,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:04:12,791 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1110225324, now seen corresponding path program 40 times [2020-10-28 15:04:12,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:12,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435966536] [2020-10-28 15:04:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:12,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:12,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:17,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:17,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 15:04:17,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4883 [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:04:17,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:17,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:17,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:17,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:17,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 806 proven. 225 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-28 15:04:17,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435966536] [2020-10-28 15:04:17,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:17,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:04:17,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898521431] [2020-10-28 15:04:17,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:04:17,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:04:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:04:17,977 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 19 states. [2020-10-28 15:04:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:18,802 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-28 15:04:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:04:18,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2020-10-28 15:04:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:18,805 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:04:18,805 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:04:18,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:04:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:04:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 15:04:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 15:04:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2020-10-28 15:04:18,813 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 95 [2020-10-28 15:04:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:18,814 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2020-10-28 15:04:18,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:04:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2020-10-28 15:04:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 15:04:18,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:18,815 INFO L422 BasicCegarLoop]: trace histogram [42, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:18,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:04:18,815 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:18,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1073573177, now seen corresponding path program 41 times [2020-10-28 15:04:18,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:18,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971640800] [2020-10-28 15:04:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:18,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:23,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:23,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 15:04:23,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:23,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:04:23,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:23,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:04:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:04:23,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:24,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:24,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 837 proven. 702 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 15:04:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971640800] [2020-10-28 15:04:24,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:24,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:04:24,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274526263] [2020-10-28 15:04:24,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:04:24,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:24,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:04:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:04:24,426 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 30 states. [2020-10-28 15:04:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:25,920 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2020-10-28 15:04:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:04:25,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2020-10-28 15:04:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:25,922 INFO L225 Difference]: With dead ends: 140 [2020-10-28 15:04:25,922 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:04:25,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:04:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:04:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-28 15:04:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:04:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-28 15:04:25,929 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 97 [2020-10-28 15:04:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:25,930 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-28 15:04:25,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:04:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-28 15:04:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 15:04:25,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:25,931 INFO L422 BasicCegarLoop]: trace histogram [43, 27, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:25,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:04:25,931 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1906882404, now seen corresponding path program 42 times [2020-10-28 15:04:25,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975978564] [2020-10-28 15:04:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:25,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:25,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:04:30,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:31,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:31,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:31,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:31,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:31,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:04:31,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:31,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:31,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 891 proven. 256 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-28 15:04:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975978564] [2020-10-28 15:04:31,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:31,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:04:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990280967] [2020-10-28 15:04:31,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:04:31,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:04:31,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:04:31,319 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 20 states. [2020-10-28 15:04:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:32,199 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-28 15:04:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:04:32,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-28 15:04:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:32,202 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:04:32,202 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:04:32,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:04:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:04:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 15:04:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 15:04:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2020-10-28 15:04:32,210 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 99 [2020-10-28 15:04:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:32,210 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2020-10-28 15:04:32,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:04:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2020-10-28 15:04:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 15:04:32,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:32,211 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:32,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:04:32,212 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash 9702015, now seen corresponding path program 43 times [2020-10-28 15:04:32,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:32,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335956686] [2020-10-28 15:04:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:35,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 15:04:35,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3201 [2020-10-28 15:04:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:35,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:04:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:04:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:36,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:36,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 924 proven. 756 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 15:04:36,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335956686] [2020-10-28 15:04:36,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:36,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:04:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757856288] [2020-10-28 15:04:36,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:04:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:04:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:04:36,107 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand 31 states. [2020-10-28 15:04:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:37,724 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2020-10-28 15:04:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:04:37,725 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-10-28 15:04:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:37,726 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:04:37,727 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 15:04:37,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:04:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 15:04:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-28 15:04:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 15:04:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2020-10-28 15:04:37,736 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 101 [2020-10-28 15:04:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:37,736 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2020-10-28 15:04:37,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:04:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2020-10-28 15:04:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 15:04:37,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:37,737 INFO L422 BasicCegarLoop]: trace histogram [45, 28, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:37,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:04:37,737 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1932302492, now seen corresponding path program 44 times [2020-10-28 15:04:37,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:37,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579325032] [2020-10-28 15:04:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:38,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:41,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3352 [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:41,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:04:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:04:41,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:41,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:41,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:41,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:41,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:41,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:41,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 957 proven. 812 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 15:04:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579325032] [2020-10-28 15:04:41,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:41,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:04:41,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480774752] [2020-10-28 15:04:41,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:04:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:04:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:04:41,809 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 32 states. [2020-10-28 15:04:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:43,609 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-28 15:04:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:04:43,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-10-28 15:04:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:43,611 INFO L225 Difference]: With dead ends: 148 [2020-10-28 15:04:43,611 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 15:04:43,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:04:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 15:04:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-28 15:04:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 15:04:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-28 15:04:43,620 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 103 [2020-10-28 15:04:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:43,621 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-28 15:04:43,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:04:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-28 15:04:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 15:04:43,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:43,622 INFO L422 BasicCegarLoop]: trace histogram [46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:43,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:04:43,622 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1579543687, now seen corresponding path program 45 times [2020-10-28 15:04:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:43,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340977923] [2020-10-28 15:04:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:47,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3592 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 15:04:47,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:04:47,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:47,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:47,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:47,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1015 proven. 289 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-28 15:04:47,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340977923] [2020-10-28 15:04:47,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:47,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:04:47,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337032209] [2020-10-28 15:04:47,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:04:47,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:04:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:04:47,563 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 21 states. [2020-10-28 15:04:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:48,521 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-10-28 15:04:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:04:48,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-28 15:04:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:48,525 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:04:48,525 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:04:48,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:04:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:04:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 15:04:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 15:04:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2020-10-28 15:04:48,534 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 105 [2020-10-28 15:04:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2020-10-28 15:04:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:04:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2020-10-28 15:04:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 15:04:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:48,535 INFO L422 BasicCegarLoop]: trace histogram [47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:48,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:04:48,535 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash -371280556, now seen corresponding path program 46 times [2020-10-28 15:04:48,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:48,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195804746] [2020-10-28 15:04:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:48,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3853 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:52,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 15:04:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:53,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:53,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:53,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:53,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1050 proven. 870 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 15:04:53,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195804746] [2020-10-28 15:04:53,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:53,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:04:53,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50684955] [2020-10-28 15:04:53,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:04:53,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:04:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:04:53,125 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand 33 states. [2020-10-28 15:04:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:54,865 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2020-10-28 15:04:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:04:54,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 107 [2020-10-28 15:04:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:54,866 INFO L225 Difference]: With dead ends: 154 [2020-10-28 15:04:54,867 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 15:04:54,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:04:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 15:04:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-28 15:04:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 15:04:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-28 15:04:54,875 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 107 [2020-10-28 15:04:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:54,875 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-28 15:04:54,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:04:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-28 15:04:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 15:04:54,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:54,876 INFO L422 BasicCegarLoop]: trace histogram [48, 30, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:54,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:04:54,876 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1117161039, now seen corresponding path program 47 times [2020-10-28 15:04:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:54,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292804938] [2020-10-28 15:04:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:54,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:55,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4015 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 15:04:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:59,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:59,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:59,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:59,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:59,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1085 proven. 930 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 15:04:59,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292804938] [2020-10-28 15:04:59,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:59,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:04:59,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474025461] [2020-10-28 15:04:59,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:04:59,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:04:59,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:04:59,667 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 34 states. [2020-10-28 15:05:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:01,477 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2020-10-28 15:05:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:05:01,478 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 109 [2020-10-28 15:05:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:01,479 INFO L225 Difference]: With dead ends: 156 [2020-10-28 15:05:01,480 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 15:05:01,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:05:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 15:05:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-28 15:05:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:05:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2020-10-28 15:05:01,487 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 109 [2020-10-28 15:05:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2020-10-28 15:05:01,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:05:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2020-10-28 15:05:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:05:01,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:01,488 INFO L422 BasicCegarLoop]: trace histogram [49, 31, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:01,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:05:01,488 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash -648766770, now seen corresponding path program 48 times [2020-10-28 15:05:01,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:01,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487310596] [2020-10-28 15:05:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:01,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:05,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:05,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 15:05:05,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:05,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4277 [2020-10-28 15:05:05,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:05,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:05:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 15:05:05,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:05:05,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:06,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:06,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:06,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:06,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1147 proven. 324 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-28 15:05:06,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487310596] [2020-10-28 15:05:06,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:06,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:05:06,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925036380] [2020-10-28 15:05:06,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:05:06,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:05:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:05:06,133 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 22 states. [2020-10-28 15:05:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:07,109 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-28 15:05:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:05:07,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-28 15:05:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:07,111 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:05:07,111 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:05:07,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:05:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:05:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 15:05:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:05:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2020-10-28 15:05:07,119 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 111 [2020-10-28 15:05:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:07,119 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2020-10-28 15:05:07,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:05:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2020-10-28 15:05:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 15:05:07,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:07,120 INFO L422 BasicCegarLoop]: trace histogram [50, 31, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:07,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:05:07,120 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 752139113, now seen corresponding path program 49 times [2020-10-28 15:05:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:07,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549006761] [2020-10-28 15:05:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:05:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:05:12,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:12,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1184 proven. 992 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 15:05:12,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549006761] [2020-10-28 15:05:12,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:12,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:05:12,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572649941] [2020-10-28 15:05:12,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:05:12,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:05:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:05:12,995 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand 35 states. [2020-10-28 15:05:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:15,054 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2020-10-28 15:05:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:05:15,055 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 113 [2020-10-28 15:05:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:15,057 INFO L225 Difference]: With dead ends: 162 [2020-10-28 15:05:15,057 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 15:05:15,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:05:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 15:05:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-28 15:05:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 15:05:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-10-28 15:05:15,063 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 113 [2020-10-28 15:05:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:15,064 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-10-28 15:05:15,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:05:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-10-28 15:05:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 15:05:15,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:15,065 INFO L422 BasicCegarLoop]: trace histogram [51, 32, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:15,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:05:15,065 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash 769656326, now seen corresponding path program 50 times [2020-10-28 15:05:15,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:15,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620516373] [2020-10-28 15:05:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:20,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 15:05:20,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:20,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:05:20,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:20,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:20,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:20,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:20,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1248 proven. 361 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-28 15:05:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620516373] [2020-10-28 15:05:20,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:20,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:05:20,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498896711] [2020-10-28 15:05:20,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:05:20,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:05:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:05:20,491 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 23 states. [2020-10-28 15:05:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:21,627 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-10-28 15:05:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:05:21,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-10-28 15:05:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:21,629 INFO L225 Difference]: With dead ends: 126 [2020-10-28 15:05:21,629 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 15:05:21,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:05:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 15:05:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 15:05:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 15:05:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2020-10-28 15:05:21,638 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 115 [2020-10-28 15:05:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:21,639 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2020-10-28 15:05:21,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:05:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2020-10-28 15:05:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 15:05:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:21,640 INFO L422 BasicCegarLoop]: trace histogram [52, 32, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:21,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:05:21,640 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1942865759, now seen corresponding path program 51 times [2020-10-28 15:05:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:21,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765930927] [2020-10-28 15:05:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:26,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 15:05:26,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:27,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1287 proven. 1056 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 15:05:27,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765930927] [2020-10-28 15:05:27,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:27,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:05:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637584697] [2020-10-28 15:05:27,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:05:27,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:05:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:05:27,576 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand 36 states. [2020-10-28 15:05:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:29,746 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2020-10-28 15:05:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:05:29,746 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 117 [2020-10-28 15:05:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:29,747 INFO L225 Difference]: With dead ends: 168 [2020-10-28 15:05:29,747 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 15:05:29,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:05:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 15:05:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 15:05:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 15:05:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-10-28 15:05:29,756 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 117 [2020-10-28 15:05:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:29,757 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-10-28 15:05:29,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:05:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-10-28 15:05:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 15:05:29,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:29,758 INFO L422 BasicCegarLoop]: trace histogram [53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:29,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:05:29,758 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:29,758 INFO L82 PathProgramCache]: Analyzing trace with hash 724364478, now seen corresponding path program 52 times [2020-10-28 15:05:29,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:29,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084014177] [2020-10-28 15:05:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:29,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 15:05:34,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:34,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 15:05:34,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:35,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:35,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:35,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:35,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1326 proven. 1122 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 15:05:35,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084014177] [2020-10-28 15:05:35,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:35,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 15:05:35,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248154115] [2020-10-28 15:05:35,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 15:05:35,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 15:05:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:05:35,758 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 37 states. [2020-10-28 15:05:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:37,970 INFO L93 Difference]: Finished difference Result 170 states and 211 transitions. [2020-10-28 15:05:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 15:05:37,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 119 [2020-10-28 15:05:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:37,972 INFO L225 Difference]: With dead ends: 170 [2020-10-28 15:05:37,973 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 15:05:37,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 15:05:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 15:05:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-28 15:05:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:05:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-10-28 15:05:37,981 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 119 [2020-10-28 15:05:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:37,982 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-10-28 15:05:37,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 15:05:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-10-28 15:05:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 15:05:37,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:37,983 INFO L422 BasicCegarLoop]: trace histogram [54, 34, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:37,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:05:37,983 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash -162853477, now seen corresponding path program 53 times [2020-10-28 15:05:37,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:37,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976299854] [2020-10-28 15:05:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:38,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:38,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:05:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:43,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:43,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:43,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1394 proven. 400 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-28 15:05:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976299854] [2020-10-28 15:05:43,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:43,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:05:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678371196] [2020-10-28 15:05:43,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:05:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:05:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:05:43,454 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 24 states. [2020-10-28 15:05:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:44,641 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-28 15:05:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:05:44,642 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-10-28 15:05:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:44,644 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:05:44,644 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:05:44,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:05:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:05:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 15:05:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 15:05:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-10-28 15:05:44,652 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 121 [2020-10-28 15:05:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:44,652 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-10-28 15:05:44,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:05:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-10-28 15:05:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 15:05:44,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:44,653 INFO L422 BasicCegarLoop]: trace histogram [55, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:44,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:05:44,653 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:44,654 INFO L82 PathProgramCache]: Analyzing trace with hash -436621578, now seen corresponding path program 54 times [2020-10-28 15:05:44,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:44,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007424698] [2020-10-28 15:05:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:49,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:49,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 15:05:49,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 15:05:49,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:50,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:50,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1435 proven. 1190 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 15:05:50,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007424698] [2020-10-28 15:05:50,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:50,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 15:05:50,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189139365] [2020-10-28 15:05:50,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 15:05:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 15:05:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:05:50,714 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 38 states. [2020-10-28 15:05:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:53,035 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2020-10-28 15:05:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 15:05:53,036 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 123 [2020-10-28 15:05:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:53,037 INFO L225 Difference]: With dead ends: 176 [2020-10-28 15:05:53,037 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 15:05:53,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 15:05:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 15:05:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 15:05:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 15:05:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2020-10-28 15:05:53,045 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 123 [2020-10-28 15:05:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:53,046 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2020-10-28 15:05:53,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 15:05:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2020-10-28 15:05:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 15:05:53,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:53,046 INFO L422 BasicCegarLoop]: trace histogram [56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:05:53,047 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1053681325, now seen corresponding path program 55 times [2020-10-28 15:05:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:53,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272545528] [2020-10-28 15:05:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 15:05:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:05:58,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:58,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1505 proven. 441 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-28 15:05:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272545528] [2020-10-28 15:05:58,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:58,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:05:58,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453949740] [2020-10-28 15:05:58,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:05:58,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:05:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:05:58,547 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand 25 states. [2020-10-28 15:05:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:59,845 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2020-10-28 15:05:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:05:59,846 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-10-28 15:05:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:59,847 INFO L225 Difference]: With dead ends: 136 [2020-10-28 15:05:59,848 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:05:59,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:05:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:05:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-28 15:05:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 15:05:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-10-28 15:05:59,856 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 125 [2020-10-28 15:05:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:59,856 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-10-28 15:05:59,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:05:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-10-28 15:05:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 15:05:59,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:59,857 INFO L422 BasicCegarLoop]: trace histogram [57, 35, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:59,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 15:05:59,858 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1823691602, now seen corresponding path program 56 times [2020-10-28 15:05:59,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:59,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594414890] [2020-10-28 15:05:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 15:06:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:04,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 15:06:04,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:05,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:05,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:05,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1548 proven. 1260 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 15:06:05,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594414890] [2020-10-28 15:06:05,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:05,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 15:06:05,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565057241] [2020-10-28 15:06:05,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 15:06:05,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 15:06:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:06:05,956 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 39 states. [2020-10-28 15:06:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:08,442 INFO L93 Difference]: Finished difference Result 182 states and 227 transitions. [2020-10-28 15:06:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 15:06:08,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 127 [2020-10-28 15:06:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:08,445 INFO L225 Difference]: With dead ends: 182 [2020-10-28 15:06:08,445 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:06:08,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 15:06:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:06:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 15:06:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 15:06:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2020-10-28 15:06:08,454 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 127 [2020-10-28 15:06:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,455 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2020-10-28 15:06:08,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 15:06:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2020-10-28 15:06:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 15:06:08,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,456 INFO L422 BasicCegarLoop]: trace histogram [58, 36, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 15:06:08,456 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash -312565621, now seen corresponding path program 57 times [2020-10-28 15:06:08,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811481874] [2020-10-28 15:06:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:13,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 15:06:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:14,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1591 proven. 1332 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 15:06:14,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811481874] [2020-10-28 15:06:14,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:14,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:06:14,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655873637] [2020-10-28 15:06:14,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:06:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:06:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:06:14,626 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 40 states. [2020-10-28 15:06:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:17,040 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2020-10-28 15:06:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:06:17,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 129 [2020-10-28 15:06:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:17,042 INFO L225 Difference]: With dead ends: 184 [2020-10-28 15:06:17,043 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 15:06:17,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:06:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 15:06:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 15:06:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 15:06:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-10-28 15:06:17,052 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 129 [2020-10-28 15:06:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:17,052 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-10-28 15:06:17,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:06:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-10-28 15:06:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 15:06:17,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:17,053 INFO L422 BasicCegarLoop]: trace histogram [59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:17,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 15:06:17,053 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 180556072, now seen corresponding path program 58 times [2020-10-28 15:06:17,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:17,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804743280] [2020-10-28 15:06:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 15:06:22,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:06:22,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:06:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:06:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:06:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:22,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1665 proven. 484 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-28 15:06:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804743280] [2020-10-28 15:06:22,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:22,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:06:22,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736341333] [2020-10-28 15:06:22,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:06:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:06:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:06:22,571 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 26 states. [2020-10-28 15:06:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,920 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2020-10-28 15:06:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:06:23,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-10-28 15:06:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,922 INFO L225 Difference]: With dead ends: 142 [2020-10-28 15:06:23,922 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 15:06:23,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:06:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 15:06:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-28 15:06:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 15:06:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2020-10-28 15:06:23,930 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 131 [2020-10-28 15:06:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,930 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2020-10-28 15:06:23,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:06:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2020-10-28 15:06:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 15:06:23,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,931 INFO L422 BasicCegarLoop]: trace histogram [60, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 15:06:23,932 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1132526781, now seen corresponding path program 59 times [2020-10-28 15:06:23,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205867705] [2020-10-28 15:06:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 15:06:28,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:30,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:30,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:30,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:30,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:30,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1710 proven. 1406 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 15:06:30,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205867705] [2020-10-28 15:06:30,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:30,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 15:06:30,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744958386] [2020-10-28 15:06:30,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 15:06:30,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:30,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 15:06:30,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:06:30,129 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand 41 states.