/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/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:06:27,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:06:27,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:06:27,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:06:27,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:06:27,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:06:27,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:06:27,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:06:27,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:06:27,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:06:27,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:06:27,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:06:27,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:06:27,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:06:27,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:06:27,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:06:27,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:06:27,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:06:27,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:06:27,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:06:27,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:06:27,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:06:27,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:06:27,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:06:27,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:06:27,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:06:27,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:06:27,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:06:27,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:06:27,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:06:27,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:06:27,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:06:27,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:06:27,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:06:27,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:06:27,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:06:27,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:06:27,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:06:27,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:06:27,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:06:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:06:27,173 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 09:06:27,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:06:27,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:06:27,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:06:27,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:06:27,225 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:06:27,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:06:27,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:06:27,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:06:27,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:06:27,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:06:27,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:06:27,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:06:27,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:06:27,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:06:27,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:06:27,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:06:27,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:06:27,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:06:27,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:06:27,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:06:27,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:06:27,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:06:27,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:06:27,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:06:27,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:06:27,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:06:27,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:06:27,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:06:27,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:06:27,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:06:27,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:06:27,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:06:27,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:06:27,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:06:27,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:06:27,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-28 09:06:27,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6c314ec/dfc038e708104482890ea74867e7eea9/FLAGd75c03c83 [2020-10-28 09:06:28,319 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:06:28,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-28 09:06:28,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6c314ec/dfc038e708104482890ea74867e7eea9/FLAGd75c03c83 [2020-10-28 09:06:28,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a6c314ec/dfc038e708104482890ea74867e7eea9 [2020-10-28 09:06:28,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:06:28,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:06:28,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:28,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:06:28,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:06:28,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249c61d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:28, skipping insertion in model container [2020-10-28 09:06:28,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:28" (1/1) ... [2020-10-28 09:06:28,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:06:28,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:06:28,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:28,985 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:06:29,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:29,027 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:06:29,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29 WrapperNode [2020-10-28 09:06:29,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:29,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:06:29,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:06:29,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:06:29,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (1/1) ... [2020-10-28 09:06:29,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:06:29,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:06:29,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:06:29,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:06:29,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (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 09:06:29,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:06:29,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:06:29,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:06:29,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:06:29,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:06:29,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:06:29,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:06:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:06:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:06:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:06:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:06:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:06:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:06:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:06:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:06:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:06:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:06:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:06:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:06:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:06:29,578 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:06:29,578 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 09:06:29,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:29 BoogieIcfgContainer [2020-10-28 09:06:29,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:06:29,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:06:29,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:06:29,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:06:29,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:06:28" (1/3) ... [2020-10-28 09:06:29,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7812b951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:29, skipping insertion in model container [2020-10-28 09:06:29,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:29" (2/3) ... [2020-10-28 09:06:29,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7812b951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:29, skipping insertion in model container [2020-10-28 09:06:29,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:29" (3/3) ... [2020-10-28 09:06:29,593 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2020-10-28 09:06:29,605 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:06:29,610 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:06:29,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:06:29,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:06:29,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:06:29,666 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:06:29,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:06:29,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:06:29,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:06:29,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:06:29,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:06:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-28 09:06:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 09:06:29,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:29,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:29,700 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1293071188, now seen corresponding path program 1 times [2020-10-28 09:06:29,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:29,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960957814] [2020-10-28 09:06:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:30,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 09:06:30,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:30,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-28 09:06:30,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:30,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:30,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:06:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:30,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:06:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:30,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:30,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:06:30,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:30,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:30,700 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 09:06:30,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960957814] [2020-10-28 09:06:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:30,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:06:30,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246932891] [2020-10-28 09:06:30,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:06:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:06:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:06:30,730 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-28 09:06:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:30,848 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2020-10-28 09:06:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:06:30,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 09:06:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:30,858 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:06:30,858 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 09:06:30,861 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 09:06:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 09:06:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 09:06:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:06:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-28 09:06:30,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-28 09:06:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:30,902 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-28 09:06:30,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:06:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-28 09:06:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 09:06:30,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:30,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:30,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:06:30,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 519028263, now seen corresponding path program 1 times [2020-10-28 09:06:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:30,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823853552] [2020-10-28 09:06:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:31,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:06:31,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:06:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:31,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:31,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:31,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:31,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:06:31,218 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 09:06:31,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823853552] [2020-10-28 09:06:31,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:31,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:06:31,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626638882] [2020-10-28 09:06:31,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:31,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:31,228 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-10-28 09:06:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:31,402 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-28 09:06:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:31,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 09:06:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:31,404 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:06:31,404 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:06:31,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:06:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:06:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:06:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-28 09:06:31,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 18 [2020-10-28 09:06:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:31,414 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-28 09:06:31,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-28 09:06:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:06:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:31,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:31,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:06:31,416 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash -487290571, now seen corresponding path program 1 times [2020-10-28 09:06:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547391403] [2020-10-28 09:06:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:06:32,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:32,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-28 09:06:32,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:32,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:32,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:06:32,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:32,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:32,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:32,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:06:32,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547391403] [2020-10-28 09:06:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:32,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:06:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532897232] [2020-10-28 09:06:32,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:32,188 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-28 09:06:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:32,339 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-28 09:06:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:32,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 09:06:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:32,341 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:06:32,341 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 09:06:32,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 09:06:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-10-28 09:06:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:06:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 09:06:32,351 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2020-10-28 09:06:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:32,351 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 09:06:32,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 09:06:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:06:32,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:32,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:32,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:06:32,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -502200601, now seen corresponding path program 1 times [2020-10-28 09:06:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:32,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480807529] [2020-10-28 09:06:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:37,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:06:37,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:06:37,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:06:37,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:37,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:06:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:06:37,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:37,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:37,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:06:37,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480807529] [2020-10-28 09:06:37,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:37,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:06:37,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653980506] [2020-10-28 09:06:37,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:06:37,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:06:37,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:06:37,463 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 4 states. [2020-10-28 09:06:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:37,581 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-10-28 09:06:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:06:37,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 09:06:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:37,583 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:06:37,583 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:06:37,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:06:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:06:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 09:06:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:06:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-28 09:06:37,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 30 [2020-10-28 09:06:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:37,599 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-28 09:06:37,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:06:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-28 09:06:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 09:06:37,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:37,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:37,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:06:37,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -483416759, now seen corresponding path program 1 times [2020-10-28 09:06:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086900825] [2020-10-28 09:06:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:42,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:42,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:06:42,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:06:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:06:42,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:42,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:06:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:06:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:42,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:42,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:42,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:42,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:42,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:42,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:42,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:42,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:42,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:06:42,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086900825] [2020-10-28 09:06:42,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:42,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:06:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508970204] [2020-10-28 09:06:42,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:06:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:06:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:42,728 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-10-28 09:06:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:42,940 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-10-28 09:06:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:06:42,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-28 09:06:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:42,943 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:06:42,943 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:06:42,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:06:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-28 09:06:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:06:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-28 09:06:42,958 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 32 [2020-10-28 09:06:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:42,962 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-28 09:06:42,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:06:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-28 09:06:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:06:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:42,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:42,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:06:42,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash 72145391, now seen corresponding path program 2 times [2020-10-28 09:06:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:42,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198632063] [2020-10-28 09:06:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:45,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:47,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:06:47,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:06:47,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:06:47,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:47,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:06:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:48,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:48,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:48,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:48,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:48,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 09:06:48,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198632063] [2020-10-28 09:06:48,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:48,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:06:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843740005] [2020-10-28 09:06:48,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:48,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:48,102 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 5 states. [2020-10-28 09:06:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:48,237 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-28 09:06:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:48,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-28 09:06:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:48,240 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:06:48,240 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 09:06:48,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 09:06:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-28 09:06:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:06:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-28 09:06:48,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 38 [2020-10-28 09:06:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:48,248 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-28 09:06:48,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-28 09:06:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:06:48,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:48,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:48,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:06:48,250 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 102757969, now seen corresponding path program 3 times [2020-10-28 09:06:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:48,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886266103] [2020-10-28 09:06:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:48,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:53,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:06:53,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:06:53,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:06:53,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:53,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:53,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:06:53,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:53,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:06:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:53,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:06:53,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:53,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:06:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886266103] [2020-10-28 09:06:53,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:53,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:06:53,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878766942] [2020-10-28 09:06:53,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:06:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:06:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:53,394 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 7 states. [2020-10-28 09:06:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:53,592 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-10-28 09:06:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:06:53,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-28 09:06:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:53,596 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:06:53,596 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:06:53,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:06:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-28 09:06:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:06:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-28 09:06:53,614 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 40 [2020-10-28 09:06:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:53,614 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-28 09:06:53,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:06:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-28 09:06:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:06:53,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:53,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:53,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:06:53,619 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:53,619 INFO L82 PathProgramCache]: Analyzing trace with hash -551959061, now seen corresponding path program 4 times [2020-10-28 09:06:53,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:53,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888179087] [2020-10-28 09:06:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:53,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:58,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:06:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:06:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:06:58,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:58,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:06:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:06:58,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:58,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:58,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:58,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:58,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:58,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:58,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 09:06:58,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888179087] [2020-10-28 09:06:58,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:58,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:06:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024738947] [2020-10-28 09:06:58,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:06:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:58,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:06:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:58,787 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-10-28 09:06:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:59,026 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2020-10-28 09:06:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:06:59,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-28 09:06:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:59,029 INFO L225 Difference]: With dead ends: 104 [2020-10-28 09:06:59,029 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:06:59,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:06:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-28 09:06:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:06:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-28 09:06:59,047 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 46 [2020-10-28 09:06:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:59,048 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-28 09:06:59,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:06:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-28 09:06:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:06:59,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:59,049 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:59,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:06:59,050 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:59,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1485792401, now seen corresponding path program 5 times [2020-10-28 09:06:59,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:59,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010851587] [2020-10-28 09:06:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:04,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:07:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:07:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:04,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:04,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:04,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 09:07:04,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010851587] [2020-10-28 09:07:04,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:04,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:07:04,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444977374] [2020-10-28 09:07:04,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:07:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:04,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:07:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:04,190 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 6 states. [2020-10-28 09:07:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:04,319 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-10-28 09:07:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:07:04,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-28 09:07:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:04,321 INFO L225 Difference]: With dead ends: 130 [2020-10-28 09:07:04,321 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:07:04,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:07:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-28 09:07:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:07:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-28 09:07:04,328 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 52 [2020-10-28 09:07:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:04,328 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-28 09:07:04,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:07:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-28 09:07:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:07:04,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:04,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:07:04,330 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1832899213, now seen corresponding path program 6 times [2020-10-28 09:07:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123850654] [2020-10-28 09:07:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:04,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:06,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:06,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:08,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:08,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:09,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:07:09,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:07:09,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:07:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:09,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:09,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:09,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:09,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-28 09:07:09,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123850654] [2020-10-28 09:07:09,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:09,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:07:09,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309025199] [2020-10-28 09:07:09,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:07:09,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:07:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:09,460 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 9 states. [2020-10-28 09:07:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:09,603 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2020-10-28 09:07:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:07:09,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-28 09:07:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:09,604 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:07:09,605 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:07:09,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:07:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-28 09:07:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:07:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-10-28 09:07:09,622 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 54 [2020-10-28 09:07:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:09,623 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-10-28 09:07:09,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:07:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-10-28 09:07:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:07:09,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:09,624 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:09,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:07:09,624 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash -862453747, now seen corresponding path program 7 times [2020-10-28 09:07:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407556513] [2020-10-28 09:07:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:14,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:14,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:07:14,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:07:14,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:07:14,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:14,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:14,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:07:14,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:14,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:07:14,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:14,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:14,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:14,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:14,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:14,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:14,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:14,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:14,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:14,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:14,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:07:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407556513] [2020-10-28 09:07:14,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:14,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:07:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470544503] [2020-10-28 09:07:14,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:07:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:07:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:14,772 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 10 states. [2020-10-28 09:07:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:14,973 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2020-10-28 09:07:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:07:14,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 09:07:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:14,974 INFO L225 Difference]: With dead ends: 130 [2020-10-28 09:07:14,974 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 09:07:14,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 09:07:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-28 09:07:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:07:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-28 09:07:14,981 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 60 [2020-10-28 09:07:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:14,981 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-28 09:07:14,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:07:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-28 09:07:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:07:14,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:14,982 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:14,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:07:14,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1397639347, now seen corresponding path program 8 times [2020-10-28 09:07:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:14,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402978875] [2020-10-28 09:07:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:20,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:07:20,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:07:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:07:20,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:20,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:20,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:20,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:20,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:20,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:20,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:07:20,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402978875] [2020-10-28 09:07:20,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:20,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:07:20,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497861304] [2020-10-28 09:07:20,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:07:20,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:20,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:07:20,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:20,141 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 7 states. [2020-10-28 09:07:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:20,290 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2020-10-28 09:07:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:07:20,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-28 09:07:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:20,292 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:07:20,292 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 09:07:20,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 09:07:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-28 09:07:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:07:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-10-28 09:07:20,306 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 66 [2020-10-28 09:07:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:20,306 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-10-28 09:07:20,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:07:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-10-28 09:07:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:07:20,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:20,309 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:20,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:07:20,310 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:20,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:20,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1204494827, now seen corresponding path program 9 times [2020-10-28 09:07:20,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:20,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686119151] [2020-10-28 09:07:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:21,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:25,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:07:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:25,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:25,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:25,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:25,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:25,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 09:07:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686119151] [2020-10-28 09:07:25,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:25,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:07:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981857228] [2020-10-28 09:07:25,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:07:25,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:25,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:07:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:25,479 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 11 states. [2020-10-28 09:07:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:25,691 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2020-10-28 09:07:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:07:25,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-28 09:07:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:25,694 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:07:25,694 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:07:25,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:07:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2020-10-28 09:07:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:07:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2020-10-28 09:07:25,700 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 68 [2020-10-28 09:07:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:25,701 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2020-10-28 09:07:25,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:07:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2020-10-28 09:07:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:07:25,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:25,702 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:25,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:07:25,702 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -468962385, now seen corresponding path program 10 times [2020-10-28 09:07:25,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:25,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831019702] [2020-10-28 09:07:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:07:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:07:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:30,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:30,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:30,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:30,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:30,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:30,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-28 09:07:30,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831019702] [2020-10-28 09:07:30,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:30,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:07:30,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170498718] [2020-10-28 09:07:30,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:07:30,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:07:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:30,824 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand 8 states. [2020-10-28 09:07:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:30,949 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2020-10-28 09:07:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:07:30,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-28 09:07:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:30,951 INFO L225 Difference]: With dead ends: 188 [2020-10-28 09:07:30,951 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 09:07:30,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:07:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 09:07:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 09:07:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:07:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2020-10-28 09:07:30,958 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 74 [2020-10-28 09:07:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:30,958 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2020-10-28 09:07:30,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:07:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2020-10-28 09:07:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:07:30,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:30,960 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:30,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:07:30,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1715452143, now seen corresponding path program 11 times [2020-10-28 09:07:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:30,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991436722] [2020-10-28 09:07:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:31,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:07:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:07:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:36,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:36,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:36,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:36,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:36,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:36,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:36,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:36,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:07:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-28 09:07:36,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991436722] [2020-10-28 09:07:36,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:36,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:07:36,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577924652] [2020-10-28 09:07:36,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:07:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:07:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:36,162 INFO L87 Difference]: Start difference. First operand 102 states and 128 transitions. Second operand 12 states. [2020-10-28 09:07:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:36,410 INFO L93 Difference]: Finished difference Result 158 states and 201 transitions. [2020-10-28 09:07:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:07:36,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-10-28 09:07:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:36,414 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:07:36,414 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 09:07:36,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 09:07:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-28 09:07:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 09:07:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2020-10-28 09:07:36,428 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 76 [2020-10-28 09:07:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:36,428 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2020-10-28 09:07:36,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:07:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2020-10-28 09:07:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:07:36,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:36,430 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:36,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:07:36,431 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -625481673, now seen corresponding path program 12 times [2020-10-28 09:07:36,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:36,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776261766] [2020-10-28 09:07:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:41,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:41,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:07:41,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:07:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:07:41,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:41,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-10-28 09:07:41,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776261766] [2020-10-28 09:07:41,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:41,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:07:41,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3486598] [2020-10-28 09:07:41,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:07:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:07:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:41,606 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand 13 states. [2020-10-28 09:07:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:41,790 INFO L93 Difference]: Finished difference Result 170 states and 217 transitions. [2020-10-28 09:07:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:07:41,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-10-28 09:07:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:41,791 INFO L225 Difference]: With dead ends: 170 [2020-10-28 09:07:41,792 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:07:41,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:07:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-28 09:07:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:07:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2020-10-28 09:07:41,797 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 82 [2020-10-28 09:07:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:41,798 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2020-10-28 09:07:41,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:07:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2020-10-28 09:07:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:07:41,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:41,799 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:41,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:07:41,799 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:41,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1246773457, now seen corresponding path program 13 times [2020-10-28 09:07:41,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:41,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479339269] [2020-10-28 09:07:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:41,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:41,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:46,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:46,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:07:46,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:07:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:07:46,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:46,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:07:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:46,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:07:46,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:46,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:46,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-28 09:07:46,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479339269] [2020-10-28 09:07:46,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:46,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:07:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697579200] [2020-10-28 09:07:46,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:07:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:07:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:46,940 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 9 states. [2020-10-28 09:07:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:47,039 INFO L93 Difference]: Finished difference Result 226 states and 290 transitions. [2020-10-28 09:07:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:07:47,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-28 09:07:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:47,041 INFO L225 Difference]: With dead ends: 226 [2020-10-28 09:07:47,041 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:07:47,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:07:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 09:07:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:07:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 154 transitions. [2020-10-28 09:07:47,048 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 154 transitions. Word has length 88 [2020-10-28 09:07:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:47,048 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 154 transitions. [2020-10-28 09:07:47,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:07:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 154 transitions. [2020-10-28 09:07:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:07:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:47,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:47,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:07:47,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1545224013, now seen corresponding path program 14 times [2020-10-28 09:07:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173523021] [2020-10-28 09:07:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:47,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:52,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:07:52,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:07:52,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:07:52,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:52,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:07:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 09:07:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:52,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:52,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:52,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:52,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-28 09:07:52,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173523021] [2020-10-28 09:07:52,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:52,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:07:52,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481240692] [2020-10-28 09:07:52,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:07:52,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:07:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:07:52,257 INFO L87 Difference]: Start difference. First operand 122 states and 154 transitions. Second operand 14 states. [2020-10-28 09:07:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:52,500 INFO L93 Difference]: Finished difference Result 184 states and 235 transitions. [2020-10-28 09:07:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:07:52,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-10-28 09:07:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:52,503 INFO L225 Difference]: With dead ends: 184 [2020-10-28 09:07:52,503 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 09:07:52,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:07:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 09:07:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-28 09:07:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 09:07:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2020-10-28 09:07:52,510 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 90 [2020-10-28 09:07:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:52,510 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2020-10-28 09:07:52,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:07:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2020-10-28 09:07:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:07:52,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:52,511 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:52,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:07:52,512 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1191498791, now seen corresponding path program 15 times [2020-10-28 09:07:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:52,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772686261] [2020-10-28 09:07:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:07:57,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:07:57,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:07:57,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:07:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:07:57,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:07:57,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:57,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-28 09:07:57,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772686261] [2020-10-28 09:07:57,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:57,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:07:57,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765958188] [2020-10-28 09:07:57,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:07:57,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:07:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:57,653 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 10 states. [2020-10-28 09:07:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:57,779 INFO L93 Difference]: Finished difference Result 246 states and 316 transitions. [2020-10-28 09:07:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:07:57,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 96 [2020-10-28 09:07:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:57,780 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:07:57,781 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:07:57,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:07:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-28 09:07:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 09:07:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2020-10-28 09:07:57,791 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 96 [2020-10-28 09:07:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:57,793 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2020-10-28 09:07:57,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:07:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2020-10-28 09:07:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 09:07:57,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:57,794 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:57,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:07:57,795 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2062833221, now seen corresponding path program 16 times [2020-10-28 09:07:57,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:57,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915088242] [2020-10-28 09:07:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:57,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:08:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:03,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:03,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:03,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:03,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:03,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 09:08:03,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915088242] [2020-10-28 09:08:03,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:03,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:08:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314545966] [2020-10-28 09:08:03,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:08:03,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:03,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:08:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:03,032 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand 15 states. [2020-10-28 09:08:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:03,312 INFO L93 Difference]: Finished difference Result 198 states and 253 transitions. [2020-10-28 09:08:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:08:03,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-10-28 09:08:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:03,314 INFO L225 Difference]: With dead ends: 198 [2020-10-28 09:08:03,314 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 09:08:03,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 09:08:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2020-10-28 09:08:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 09:08:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2020-10-28 09:08:03,322 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 98 [2020-10-28 09:08:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:03,322 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2020-10-28 09:08:03,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:08:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2020-10-28 09:08:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:08:03,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:03,323 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:03,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:08:03,324 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1661660203, now seen corresponding path program 17 times [2020-10-28 09:08:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:03,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970192086] [2020-10-28 09:08:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:08:08,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-10-28 09:08:08,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970192086] [2020-10-28 09:08:08,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:08,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:08:08,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947332021] [2020-10-28 09:08:08,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:08:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:08:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:08,560 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2020-10-28 09:08:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:08,811 INFO L93 Difference]: Finished difference Result 210 states and 269 transitions. [2020-10-28 09:08:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:08:08,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-10-28 09:08:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:08,813 INFO L225 Difference]: With dead ends: 210 [2020-10-28 09:08:08,813 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 09:08:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 09:08:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2020-10-28 09:08:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 09:08:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2020-10-28 09:08:08,827 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 104 [2020-10-28 09:08:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:08,827 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2020-10-28 09:08:08,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:08:08,828 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2020-10-28 09:08:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 09:08:08,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:08,829 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:08,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:08:08,829 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash -634877701, now seen corresponding path program 18 times [2020-10-28 09:08:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:08,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667104946] [2020-10-28 09:08:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:10,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:10,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:11,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:13,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:08:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:13,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:08:13,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:13,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:13,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-10-28 09:08:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667104946] [2020-10-28 09:08:13,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:13,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:08:13,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311075773] [2020-10-28 09:08:13,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:08:13,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:08:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:08:13,991 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand 11 states. [2020-10-28 09:08:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:14,133 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2020-10-28 09:08:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:08:14,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2020-10-28 09:08:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:14,138 INFO L225 Difference]: With dead ends: 284 [2020-10-28 09:08:14,139 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 09:08:14,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:08:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 09:08:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-28 09:08:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 09:08:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2020-10-28 09:08:14,146 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 110 [2020-10-28 09:08:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:14,146 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2020-10-28 09:08:14,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:08:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2020-10-28 09:08:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:08:14,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:14,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:14,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:08:14,148 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1060236451, now seen corresponding path program 19 times [2020-10-28 09:08:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:14,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261605830] [2020-10-28 09:08:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:15,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:18,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:08:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:08:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-10-28 09:08:19,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261605830] [2020-10-28 09:08:19,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:19,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:08:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188557714] [2020-10-28 09:08:19,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:08:19,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:08:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:19,397 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 17 states. [2020-10-28 09:08:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:19,670 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2020-10-28 09:08:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:08:19,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 09:08:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:19,672 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:08:19,672 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 09:08:19,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 09:08:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 162. [2020-10-28 09:08:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 09:08:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2020-10-28 09:08:19,680 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 112 [2020-10-28 09:08:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:19,680 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2020-10-28 09:08:19,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:08:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2020-10-28 09:08:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:08:19,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:19,682 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:19,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:08:19,682 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1006641271, now seen corresponding path program 20 times [2020-10-28 09:08:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:19,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971590028] [2020-10-28 09:08:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:22,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 09:08:24,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:24,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:24,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:24,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:24,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:24,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-28 09:08:24,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971590028] [2020-10-28 09:08:24,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:24,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:08:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634698476] [2020-10-28 09:08:24,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:08:24,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:08:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:08:24,962 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand 18 states. [2020-10-28 09:08:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:25,294 INFO L93 Difference]: Finished difference Result 236 states and 303 transitions. [2020-10-28 09:08:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:08:25,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 118 [2020-10-28 09:08:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:25,297 INFO L225 Difference]: With dead ends: 236 [2020-10-28 09:08:25,297 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 09:08:25,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:08:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 09:08:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2020-10-28 09:08:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-28 09:08:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 218 transitions. [2020-10-28 09:08:25,305 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 218 transitions. Word has length 118 [2020-10-28 09:08:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:25,306 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 218 transitions. [2020-10-28 09:08:25,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:08:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 218 transitions. [2020-10-28 09:08:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 09:08:25,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:25,307 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:25,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:08:25,308 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2078400413, now seen corresponding path program 21 times [2020-10-28 09:08:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:25,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697295123] [2020-10-28 09:08:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:29,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:30,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:08:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:30,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:30,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:30,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:30,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:30,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:30,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:30,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:30,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-28 09:08:30,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697295123] [2020-10-28 09:08:30,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:30,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:08:30,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771636748] [2020-10-28 09:08:30,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:08:30,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:08:30,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:30,473 INFO L87 Difference]: Start difference. First operand 171 states and 218 transitions. Second operand 12 states. [2020-10-28 09:08:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:30,612 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2020-10-28 09:08:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:08:30,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 124 [2020-10-28 09:08:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:30,615 INFO L225 Difference]: With dead ends: 322 [2020-10-28 09:08:30,615 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:08:30,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:08:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-28 09:08:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 09:08:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2020-10-28 09:08:30,622 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 124 [2020-10-28 09:08:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:30,622 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 220 transitions. [2020-10-28 09:08:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:08:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 220 transitions. [2020-10-28 09:08:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 09:08:30,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:30,624 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:30,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:08:30,625 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash 185374335, now seen corresponding path program 22 times [2020-10-28 09:08:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:30,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051423538] [2020-10-28 09:08:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:30,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:31,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:35,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:35,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:08:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:35,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:35,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:35,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-10-28 09:08:35,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051423538] [2020-10-28 09:08:35,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:35,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:08:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672016571] [2020-10-28 09:08:35,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:08:35,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:08:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:08:35,954 INFO L87 Difference]: Start difference. First operand 173 states and 220 transitions. Second operand 19 states. [2020-10-28 09:08:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:36,289 INFO L93 Difference]: Finished difference Result 250 states and 321 transitions. [2020-10-28 09:08:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:08:36,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2020-10-28 09:08:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:36,291 INFO L225 Difference]: With dead ends: 250 [2020-10-28 09:08:36,291 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 09:08:36,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:08:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 09:08:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2020-10-28 09:08:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 09:08:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2020-10-28 09:08:36,300 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 126 [2020-10-28 09:08:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:36,300 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2020-10-28 09:08:36,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:08:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2020-10-28 09:08:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 09:08:36,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:36,302 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:36,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:08:36,302 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 277923481, now seen corresponding path program 23 times [2020-10-28 09:08:36,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:36,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950314417] [2020-10-28 09:08:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:08:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:41,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-10-28 09:08:41,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950314417] [2020-10-28 09:08:41,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:41,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:08:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902857612] [2020-10-28 09:08:41,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:08:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:08:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:08:41,482 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand 13 states. [2020-10-28 09:08:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:41,637 INFO L93 Difference]: Finished difference Result 342 states and 442 transitions. [2020-10-28 09:08:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:08:41,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2020-10-28 09:08:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:41,638 INFO L225 Difference]: With dead ends: 342 [2020-10-28 09:08:41,638 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 09:08:41,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:08:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 09:08:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-28 09:08:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 09:08:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 234 transitions. [2020-10-28 09:08:41,648 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 234 transitions. Word has length 132 [2020-10-28 09:08:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:41,648 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 234 transitions. [2020-10-28 09:08:41,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:08:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 234 transitions. [2020-10-28 09:08:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 09:08:41,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:41,651 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:41,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:08:41,651 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1628404603, now seen corresponding path program 24 times [2020-10-28 09:08:41,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:41,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252367564] [2020-10-28 09:08:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:41,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:42,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:46,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:46,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 09:08:46,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:08:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:46,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:47,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:47,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:47,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:47,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:47,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-10-28 09:08:47,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252367564] [2020-10-28 09:08:47,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:47,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:08:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683075465] [2020-10-28 09:08:47,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:08:47,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:08:47,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:08:47,021 INFO L87 Difference]: Start difference. First operand 184 states and 234 transitions. Second operand 20 states. [2020-10-28 09:08:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:47,390 INFO L93 Difference]: Finished difference Result 264 states and 339 transitions. [2020-10-28 09:08:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:08:47,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 134 [2020-10-28 09:08:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:47,393 INFO L225 Difference]: With dead ends: 264 [2020-10-28 09:08:47,393 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 09:08:47,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:08:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 09:08:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2020-10-28 09:08:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 09:08:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2020-10-28 09:08:47,406 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 134 [2020-10-28 09:08:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:47,407 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2020-10-28 09:08:47,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:08:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2020-10-28 09:08:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 09:08:47,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:47,409 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:47,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:08:47,409 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 254350113, now seen corresponding path program 25 times [2020-10-28 09:08:47,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:47,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008618922] [2020-10-28 09:08:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:08:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:08:52,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:52,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-28 09:08:52,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008618922] [2020-10-28 09:08:52,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:52,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:08:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120177458] [2020-10-28 09:08:52,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:08:52,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:52,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:08:52,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:08:52,787 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand 21 states. [2020-10-28 09:08:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:53,171 INFO L93 Difference]: Finished difference Result 276 states and 355 transitions. [2020-10-28 09:08:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:08:53,171 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 140 [2020-10-28 09:08:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:53,173 INFO L225 Difference]: With dead ends: 276 [2020-10-28 09:08:53,173 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 09:08:53,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:08:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 09:08:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 202. [2020-10-28 09:08:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 09:08:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2020-10-28 09:08:53,184 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 140 [2020-10-28 09:08:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:53,185 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2020-10-28 09:08:53,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:08:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2020-10-28 09:08:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 09:08:53,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:53,186 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:53,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:08:53,186 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1890117179, now seen corresponding path program 26 times [2020-10-28 09:08:53,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:53,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357255027] [2020-10-28 09:08:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:53,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:08:58,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:58,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:58,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:58,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-10-28 09:08:58,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357255027] [2020-10-28 09:08:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:58,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:08:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778858023] [2020-10-28 09:08:58,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:08:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:08:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:58,397 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand 14 states. [2020-10-28 09:08:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:58,547 INFO L93 Difference]: Finished difference Result 380 states and 492 transitions. [2020-10-28 09:08:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:08:58,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 146 [2020-10-28 09:08:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:58,550 INFO L225 Difference]: With dead ends: 380 [2020-10-28 09:08:58,550 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 09:08:58,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 09:08:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-10-28 09:08:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 09:08:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 260 transitions. [2020-10-28 09:08:58,559 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 260 transitions. Word has length 146 [2020-10-28 09:08:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:58,559 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 260 transitions. [2020-10-28 09:08:58,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:08:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 260 transitions. [2020-10-28 09:08:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 09:08:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:58,561 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:58,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:08:58,561 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1492097123, now seen corresponding path program 27 times [2020-10-28 09:08:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:58,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958641619] [2020-10-28 09:08:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:01,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:03,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:03,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:03,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 09:09:03,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:09:03,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:03,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2020-10-28 09:09:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958641619] [2020-10-28 09:09:03,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:03,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:09:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56996129] [2020-10-28 09:09:03,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:09:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:09:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:03,983 INFO L87 Difference]: Start difference. First operand 204 states and 260 transitions. Second operand 22 states. [2020-10-28 09:09:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:04,360 INFO L93 Difference]: Finished difference Result 290 states and 373 transitions. [2020-10-28 09:09:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:09:04,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 148 [2020-10-28 09:09:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:04,362 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:09:04,362 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 09:09:04,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 09:09:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2020-10-28 09:09:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 09:09:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 272 transitions. [2020-10-28 09:09:04,373 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 272 transitions. Word has length 148 [2020-10-28 09:09:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:04,373 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 272 transitions. [2020-10-28 09:09:04,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:09:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 272 transitions. [2020-10-28 09:09:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 09:09:04,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:04,375 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:04,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:09:04,376 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1392678589, now seen corresponding path program 28 times [2020-10-28 09:09:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:04,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922063862] [2020-10-28 09:09:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:04,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:05,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:09,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 09:09:09,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:09:09,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:09:09,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:09,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:09:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:09:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:09,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:09,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:09,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:09,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:09,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:09,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2020-10-28 09:09:09,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922063862] [2020-10-28 09:09:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:09:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23692847] [2020-10-28 09:09:09,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:09:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:09:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:09:09,607 INFO L87 Difference]: Start difference. First operand 213 states and 272 transitions. Second operand 15 states. [2020-10-28 09:09:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:09,752 INFO L93 Difference]: Finished difference Result 400 states and 518 transitions. [2020-10-28 09:09:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:09:09,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 154 [2020-10-28 09:09:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:09,754 INFO L225 Difference]: With dead ends: 400 [2020-10-28 09:09:09,754 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 09:09:09,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:09:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 09:09:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-10-28 09:09:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 09:09:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 274 transitions. [2020-10-28 09:09:09,770 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 274 transitions. Word has length 154 [2020-10-28 09:09:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:09,770 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 274 transitions. [2020-10-28 09:09:09,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:09:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 274 transitions. [2020-10-28 09:09:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 09:09:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:09,771 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:09,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:09:09,772 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -897161051, now seen corresponding path program 29 times [2020-10-28 09:09:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:09,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510544933] [2020-10-28 09:09:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:10,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:09:14,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 09:09:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:15,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:15,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:15,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:15,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 09:09:15,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510544933] [2020-10-28 09:09:15,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:15,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:09:15,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417352602] [2020-10-28 09:09:15,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:09:15,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:09:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:09:15,226 INFO L87 Difference]: Start difference. First operand 215 states and 274 transitions. Second operand 23 states. [2020-10-28 09:09:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:15,640 INFO L93 Difference]: Finished difference Result 304 states and 391 transitions. [2020-10-28 09:09:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:09:15,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 156 [2020-10-28 09:09:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:15,643 INFO L225 Difference]: With dead ends: 304 [2020-10-28 09:09:15,643 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 09:09:15,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:09:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 09:09:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-10-28 09:09:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 09:09:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 286 transitions. [2020-10-28 09:09:15,652 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 286 transitions. Word has length 156 [2020-10-28 09:09:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:15,653 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 286 transitions. [2020-10-28 09:09:15,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:09:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 286 transitions. [2020-10-28 09:09:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 09:09:15,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:15,654 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:15,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:09:15,654 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:15,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1400032575, now seen corresponding path program 30 times [2020-10-28 09:09:15,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:15,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493632658] [2020-10-28 09:09:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:15,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:15,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:16,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 09:09:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:21,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:21,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:21,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:21,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2020-10-28 09:09:21,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493632658] [2020-10-28 09:09:21,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:21,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:09:21,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239730787] [2020-10-28 09:09:21,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:09:21,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:09:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:09:21,136 INFO L87 Difference]: Start difference. First operand 224 states and 286 transitions. Second operand 24 states. [2020-10-28 09:09:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:21,508 INFO L93 Difference]: Finished difference Result 316 states and 407 transitions. [2020-10-28 09:09:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:09:21,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 162 [2020-10-28 09:09:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:21,511 INFO L225 Difference]: With dead ends: 316 [2020-10-28 09:09:21,511 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 09:09:21,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:09:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 09:09:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 233. [2020-10-28 09:09:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-28 09:09:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 298 transitions. [2020-10-28 09:09:21,520 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 298 transitions. Word has length 162 [2020-10-28 09:09:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:21,520 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 298 transitions. [2020-10-28 09:09:21,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:09:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 298 transitions. [2020-10-28 09:09:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 09:09:21,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:21,522 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:21,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:09:21,522 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash -421824283, now seen corresponding path program 31 times [2020-10-28 09:09:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:21,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820623408] [2020-10-28 09:09:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:22,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:24,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 09:09:26,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:09:26,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 09:09:26,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:09:26,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:26,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:09:26,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:26,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-10-28 09:09:26,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820623408] [2020-10-28 09:09:26,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:09:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489803592] [2020-10-28 09:09:26,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:09:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:09:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:09:26,795 INFO L87 Difference]: Start difference. First operand 233 states and 298 transitions. Second operand 16 states. [2020-10-28 09:09:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:26,971 INFO L93 Difference]: Finished difference Result 438 states and 568 transitions. [2020-10-28 09:09:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:09:26,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-28 09:09:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:26,973 INFO L225 Difference]: With dead ends: 438 [2020-10-28 09:09:26,973 INFO L226 Difference]: Without dead ends: 236 [2020-10-28 09:09:26,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:09:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-28 09:09:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2020-10-28 09:09:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 09:09:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 300 transitions. [2020-10-28 09:09:26,982 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 300 transitions. Word has length 168 [2020-10-28 09:09:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:26,983 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 300 transitions. [2020-10-28 09:09:26,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:09:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 300 transitions. [2020-10-28 09:09:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 09:09:26,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:26,984 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:26,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:09:26,985 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1422334777, now seen corresponding path program 32 times [2020-10-28 09:09:26,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:26,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916248371] [2020-10-28 09:09:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:09:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:09:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:32,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:32,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:32,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:32,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:32,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:32,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:32,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:32,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-10-28 09:09:32,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916248371] [2020-10-28 09:09:32,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:32,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:09:32,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878260671] [2020-10-28 09:09:32,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:09:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:09:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:09:32,650 INFO L87 Difference]: Start difference. First operand 235 states and 300 transitions. Second operand 25 states. [2020-10-28 09:09:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:33,027 INFO L93 Difference]: Finished difference Result 330 states and 425 transitions. [2020-10-28 09:09:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:09:33,028 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2020-10-28 09:09:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:33,029 INFO L225 Difference]: With dead ends: 330 [2020-10-28 09:09:33,029 INFO L226 Difference]: Without dead ends: 252 [2020-10-28 09:09:33,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:09:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-28 09:09:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2020-10-28 09:09:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-28 09:09:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 312 transitions. [2020-10-28 09:09:33,039 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 312 transitions. Word has length 170 [2020-10-28 09:09:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:33,039 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 312 transitions. [2020-10-28 09:09:33,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:09:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 312 transitions. [2020-10-28 09:09:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 09:09:33,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:33,041 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:33,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:09:33,041 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1483770977, now seen corresponding path program 33 times [2020-10-28 09:09:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:33,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11243065] [2020-10-28 09:09:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:36,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:37,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:38,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:38,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 09:09:38,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:09:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 09:09:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:38,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:38,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2020-10-28 09:09:38,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11243065] [2020-10-28 09:09:38,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:38,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:09:38,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741594724] [2020-10-28 09:09:38,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:09:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:09:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:09:38,691 INFO L87 Difference]: Start difference. First operand 244 states and 312 transitions. Second operand 26 states. [2020-10-28 09:09:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:39,145 INFO L93 Difference]: Finished difference Result 342 states and 441 transitions. [2020-10-28 09:09:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:09:39,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 176 [2020-10-28 09:09:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:39,148 INFO L225 Difference]: With dead ends: 342 [2020-10-28 09:09:39,148 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 09:09:39,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:09:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 09:09:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2020-10-28 09:09:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-28 09:09:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 324 transitions. [2020-10-28 09:09:39,157 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 324 transitions. Word has length 176 [2020-10-28 09:09:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:39,157 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 324 transitions. [2020-10-28 09:09:39,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:09:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 324 transitions. [2020-10-28 09:09:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-28 09:09:39,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:39,159 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:39,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:09:39,159 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1334649351, now seen corresponding path program 34 times [2020-10-28 09:09:39,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:39,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015603760] [2020-10-28 09:09:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:39,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:44,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:44,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-28 09:09:44,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:09:44,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:09:44,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:44,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:44,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:44,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:44,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:44,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2020-10-28 09:09:44,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015603760] [2020-10-28 09:09:44,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:44,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:09:44,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358545436] [2020-10-28 09:09:44,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:09:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:09:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:09:44,493 INFO L87 Difference]: Start difference. First operand 253 states and 324 transitions. Second operand 17 states. [2020-10-28 09:09:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:44,674 INFO L93 Difference]: Finished difference Result 476 states and 618 transitions. [2020-10-28 09:09:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:09:44,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 182 [2020-10-28 09:09:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:44,677 INFO L225 Difference]: With dead ends: 476 [2020-10-28 09:09:44,677 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 09:09:44,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:09:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 09:09:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2020-10-28 09:09:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-28 09:09:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2020-10-28 09:09:44,685 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 182 [2020-10-28 09:09:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2020-10-28 09:09:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:09:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2020-10-28 09:09:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 09:09:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:44,687 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:44,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:09:44,688 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:44,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1236854167, now seen corresponding path program 35 times [2020-10-28 09:09:44,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:44,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447815710] [2020-10-28 09:09:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:44,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:44,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:45,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:48,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:49,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:49,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 09:09:49,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:09:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 09:09:49,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:49,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:09:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 09:09:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:50,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:50,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2020-10-28 09:09:50,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447815710] [2020-10-28 09:09:50,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:50,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:09:50,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001323465] [2020-10-28 09:09:50,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:09:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:09:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:09:50,303 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand 27 states. [2020-10-28 09:09:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:50,734 INFO L93 Difference]: Finished difference Result 356 states and 459 transitions. [2020-10-28 09:09:50,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:09:50,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 184 [2020-10-28 09:09:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:50,737 INFO L225 Difference]: With dead ends: 356 [2020-10-28 09:09:50,738 INFO L226 Difference]: Without dead ends: 272 [2020-10-28 09:09:50,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:09:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-28 09:09:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 264. [2020-10-28 09:09:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 09:09:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 338 transitions. [2020-10-28 09:09:50,748 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 338 transitions. Word has length 184 [2020-10-28 09:09:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:50,748 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 338 transitions. [2020-10-28 09:09:50,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:09:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 338 transitions. [2020-10-28 09:09:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 09:09:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:50,750 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:50,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:09:50,750 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1522238723, now seen corresponding path program 36 times [2020-10-28 09:09:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:50,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125450451] [2020-10-28 09:09:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:51,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:55,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:55,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-28 09:09:55,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:09:55,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:09:55,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:55,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:09:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:09:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:09:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:56,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1704 trivial. 0 not checked. [2020-10-28 09:09:56,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125450451] [2020-10-28 09:09:56,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:56,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:09:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289658500] [2020-10-28 09:09:56,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:09:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:09:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:09:56,050 INFO L87 Difference]: Start difference. First operand 264 states and 338 transitions. Second operand 18 states. [2020-10-28 09:09:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:56,242 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2020-10-28 09:09:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:09:56,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 190 [2020-10-28 09:09:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:56,244 INFO L225 Difference]: With dead ends: 496 [2020-10-28 09:09:56,244 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 09:09:56,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:09:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 09:09:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-28 09:09:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 09:09:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2020-10-28 09:09:56,254 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 190 [2020-10-28 09:09:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:56,254 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2020-10-28 09:09:56,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:09:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2020-10-28 09:09:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-28 09:09:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:56,256 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:56,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:09:56,256 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash 103807845, now seen corresponding path program 37 times [2020-10-28 09:09:56,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:56,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062095258] [2020-10-28 09:09:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:56,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:59,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:01,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:01,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-28 09:10:01,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:10:01,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 09:10:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:01,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:01,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:01,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1929 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2020-10-28 09:10:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062095258] [2020-10-28 09:10:01,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:01,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:10:01,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942242575] [2020-10-28 09:10:01,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:10:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:01,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:10:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:10:01,906 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand 28 states. [2020-10-28 09:10:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:02,391 INFO L93 Difference]: Finished difference Result 370 states and 477 transitions. [2020-10-28 09:10:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:10:02,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 192 [2020-10-28 09:10:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:02,394 INFO L225 Difference]: With dead ends: 370 [2020-10-28 09:10:02,394 INFO L226 Difference]: Without dead ends: 283 [2020-10-28 09:10:02,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:10:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-28 09:10:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 275. [2020-10-28 09:10:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-28 09:10:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 352 transitions. [2020-10-28 09:10:02,404 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 352 transitions. Word has length 192 [2020-10-28 09:10:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:02,404 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 352 transitions. [2020-10-28 09:10:02,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:10:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 352 transitions. [2020-10-28 09:10:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 09:10:02,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:02,406 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:02,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:10:02,406 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1673860725, now seen corresponding path program 38 times [2020-10-28 09:10:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:02,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509003813] [2020-10-28 09:10:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:03,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:07,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 09:10:07,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:08,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:08,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2020-10-28 09:10:08,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509003813] [2020-10-28 09:10:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:10:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892896064] [2020-10-28 09:10:08,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:10:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:10:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:10:08,032 INFO L87 Difference]: Start difference. First operand 275 states and 352 transitions. Second operand 29 states. [2020-10-28 09:10:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:08,533 INFO L93 Difference]: Finished difference Result 382 states and 493 transitions. [2020-10-28 09:10:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:10:08,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 198 [2020-10-28 09:10:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:08,536 INFO L225 Difference]: With dead ends: 382 [2020-10-28 09:10:08,536 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 09:10:08,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:10:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 09:10:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-28 09:10:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-28 09:10:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 364 transitions. [2020-10-28 09:10:08,545 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 364 transitions. Word has length 198 [2020-10-28 09:10:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:08,545 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 364 transitions. [2020-10-28 09:10:08,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:10:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 364 transitions. [2020-10-28 09:10:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-28 09:10:08,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:08,547 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:08,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:10:08,547 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 528324389, now seen corresponding path program 39 times [2020-10-28 09:10:08,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:08,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762610152] [2020-10-28 09:10:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:08,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:08,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:09,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:10,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:13,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:10:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:13,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2020-10-28 09:10:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762610152] [2020-10-28 09:10:13,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:13,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:10:13,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282216236] [2020-10-28 09:10:13,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:10:13,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:10:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:10:13,883 INFO L87 Difference]: Start difference. First operand 284 states and 364 transitions. Second operand 19 states. [2020-10-28 09:10:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:14,075 INFO L93 Difference]: Finished difference Result 534 states and 694 transitions. [2020-10-28 09:10:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:10:14,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 204 [2020-10-28 09:10:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:14,078 INFO L225 Difference]: With dead ends: 534 [2020-10-28 09:10:14,079 INFO L226 Difference]: Without dead ends: 287 [2020-10-28 09:10:14,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:10:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-28 09:10:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-10-28 09:10:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-28 09:10:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 366 transitions. [2020-10-28 09:10:14,088 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 366 transitions. Word has length 204 [2020-10-28 09:10:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:14,088 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 366 transitions. [2020-10-28 09:10:14,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:10:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 366 transitions. [2020-10-28 09:10:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-28 09:10:14,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:14,090 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:14,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:10:14,090 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash 954874375, now seen corresponding path program 40 times [2020-10-28 09:10:14,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:14,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427047981] [2020-10-28 09:10:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:14,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking...