/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-tiling/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:52:22,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:52:22,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:52:22,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:52:22,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:52:22,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:52:22,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:52:22,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:52:22,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:52:22,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:52:22,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:52:22,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:52:22,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:52:22,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:52:22,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:52:22,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:52:22,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:52:22,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:52:22,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:52:22,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:52:22,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:52:22,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:52:22,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:52:22,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:52:22,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:52:22,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:52:22,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:52:22,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:52:22,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:52:22,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:52:22,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:52:22,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:52:22,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:52:22,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:52:22,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:52:22,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:52:22,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:52:22,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:52:22,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:52:22,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:52:22,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:52:22,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:52:22,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:52:22,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:52:22,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:52:22,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:52:22,185 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:52:22,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:52:22,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:52:22,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:52:22,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:52:22,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:52:22,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:52:22,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:52:22,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:52:22,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:52:22,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:52:22,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:52:22,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:52:22,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:52:22,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:52:22,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:52:22,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:52:22,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:52:22,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:52:22,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:52:22,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:52:22,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:52:22,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:52:22,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:52:22,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:52:22,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:52:22,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:52:22,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:52:22,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:52:22,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:52:22,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:52:22,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2020-10-26 19:52:22,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0220bcc16/b7cf0d27949b4543a8c467f2fb57e66f/FLAGfbf0fa6ed [2020-10-26 19:52:23,392 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:52:23,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr3.c [2020-10-26 19:52:23,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0220bcc16/b7cf0d27949b4543a8c467f2fb57e66f/FLAGfbf0fa6ed [2020-10-26 19:52:23,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0220bcc16/b7cf0d27949b4543a8c467f2fb57e66f [2020-10-26 19:52:23,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:52:23,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:52:23,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:23,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:52:23,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:52:23,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:23" (1/1) ... [2020-10-26 19:52:23,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c28404e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:23, skipping insertion in model container [2020-10-26 19:52:23,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:23" (1/1) ... [2020-10-26 19:52:23,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:52:23,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:52:23,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:24,009 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:52:24,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:24,095 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:52:24,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24 WrapperNode [2020-10-26 19:52:24,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:24,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:52:24,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:52:24,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:52:24,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... [2020-10-26 19:52:24,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:52:24,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:52:24,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:52:24,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:52:24,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:52:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:52:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:52:24,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:52:24,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:52:24,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:52:24,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:52:24,856 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:52:24,857 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:52:24,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:24 BoogieIcfgContainer [2020-10-26 19:52:24,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:52:24,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:52:24,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:52:24,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:52:24,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:52:23" (1/3) ... [2020-10-26 19:52:24,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48274ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:24, skipping insertion in model container [2020-10-26 19:52:24,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:24" (2/3) ... [2020-10-26 19:52:24,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48274ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:24, skipping insertion in model container [2020-10-26 19:52:24,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:24" (3/3) ... [2020-10-26 19:52:24,868 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2020-10-26 19:52:24,881 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:52:24,887 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:52:24,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:52:24,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:52:24,932 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:52:24,932 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:52:24,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:52:24,933 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:52:24,933 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:52:24,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:52:24,933 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:52:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-26 19:52:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:52:24,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:24,960 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, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:24,960 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1931093547, now seen corresponding path program 1 times [2020-10-26 19:52:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:24,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578904615] [2020-10-26 19:52:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:52:25,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:52:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-26 19:52:25,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 19:52:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:52:25,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:25,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:25,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:52:25,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:25,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:25,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:25,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:25,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:52:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:25,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578904615] [2020-10-26 19:52:25,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:25,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:52:25,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101913631] [2020-10-26 19:52:25,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:52:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:52:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:25,737 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-26 19:52:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:25,909 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2020-10-26 19:52:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:52:25,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-26 19:52:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:25,919 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:52:25,920 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:52:25,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:52:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-26 19:52:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:52:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-26 19:52:25,974 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-26 19:52:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:25,975 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-26 19:52:25,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:52:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-26 19:52:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:52:25,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:25,977 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, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:25,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:52:25,977 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash -525347130, now seen corresponding path program 1 times [2020-10-26 19:52:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:25,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611322045] [2020-10-26 19:52:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:26,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:29,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:29,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:52:29,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:52:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3469 [2020-10-26 19:52:29,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:52:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:52:29,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:29,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:29,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:29,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:29,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:29,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:29,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:29,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:52:29,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:52:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:29,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611322045] [2020-10-26 19:52:29,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:29,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:52:29,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912016139] [2020-10-26 19:52:29,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:52:29,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:29,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:52:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:52:29,858 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-26 19:52:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:30,418 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-26 19:52:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:52:30,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-26 19:52:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:30,422 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:52:30,422 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:52:30,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:52:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-26 19:52:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:52:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:52:30,444 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-10-26 19:52:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:30,445 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:52:30,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:52:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:52:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:52:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:30,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:30,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:52:30,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1713267339, now seen corresponding path program 1 times [2020-10-26 19:52:30,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:30,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225818199] [2020-10-26 19:52:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:35,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:52:35,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:52:35,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:52:35,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:35,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:35,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:52:35,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:35,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:35,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:35,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:35,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:35,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:35,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:35,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:35,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:35,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:35,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:35,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:52:35,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:35,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:35,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:52:35,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225818199] [2020-10-26 19:52:35,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:35,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101168587] [2020-10-26 19:52:35,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:35,658 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 4 states. [2020-10-26 19:52:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:35,830 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-26 19:52:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:35,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-26 19:52:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:35,833 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:52:35,833 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:52:35,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:52:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 19:52:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:52:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-26 19:52:35,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 39 [2020-10-26 19:52:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:35,857 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-26 19:52:35,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-26 19:52:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:52:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:35,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:35,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:52:35,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1579253833, now seen corresponding path program 1 times [2020-10-26 19:52:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970712491] [2020-10-26 19:52:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:40,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:52:40,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:52:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:52:40,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:52:40,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:40,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:40,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:40,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:40,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:40,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:52:40,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:40,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:40,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:40,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:40,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:40,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:41,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:41,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:41,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:52:41,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:41,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:41,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:41,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:41,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:52:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970712491] [2020-10-26 19:52:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552854082] [2020-10-26 19:52:41,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:41,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:41,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:41,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:41,024 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 4 states. [2020-10-26 19:52:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:41,179 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-26 19:52:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:41,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-26 19:52:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:41,181 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:52:41,182 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:52:41,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:52:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 19:52:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:52:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-26 19:52:41,207 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2020-10-26 19:52:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:41,207 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-26 19:52:41,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-26 19:52:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:52:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:41,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:41,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:52:41,209 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1321088395, now seen corresponding path program 1 times [2020-10-26 19:52:41,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:41,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308307873] [2020-10-26 19:52:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:41,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:45,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:52:45,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:52:45,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4667 [2020-10-26 19:52:45,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:52:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:52:45,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:46,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:46,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:46,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:46,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:46,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:46,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:46,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:46,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:46,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:46,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:46,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:46,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:52:46,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308307873] [2020-10-26 19:52:46,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:46,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:52:46,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998698459] [2020-10-26 19:52:46,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:52:46,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:46,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:52:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:52:46,897 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 13 states. [2020-10-26 19:52:47,038 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-26 19:52:48,068 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-26 19:52:48,245 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-26 19:52:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:49,194 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-10-26 19:52:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:52:49,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-26 19:52:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:49,199 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:52:49,200 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:52:49,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:52:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:52:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2020-10-26 19:52:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:52:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-26 19:52:49,234 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 39 [2020-10-26 19:52:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:49,234 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-26 19:52:49,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:52:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-26 19:52:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:52:49,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:49,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:49,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:52:49,242 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1378346697, now seen corresponding path program 1 times [2020-10-26 19:52:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:49,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082024163] [2020-10-26 19:52:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:51,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:54,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:54,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:52:54,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:52:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:52:54,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:52:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:52:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:54,739 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2020-10-26 19:52:55,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:55,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:55,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:55,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:55,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:52:55,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082024163] [2020-10-26 19:52:55,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:55,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:52:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205581799] [2020-10-26 19:52:55,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:52:55,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:55,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:52:55,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:52:55,443 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 15 states. [2020-10-26 19:52:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:58,155 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2020-10-26 19:52:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:52:58,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-26 19:52:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:58,160 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:52:58,160 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:52:58,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:52:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:52:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2020-10-26 19:52:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:52:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-26 19:52:58,201 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 39 [2020-10-26 19:52:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:58,201 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-26 19:52:58,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:52:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-26 19:52:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:52:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:58,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:58,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:52:58,204 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash -545616471, now seen corresponding path program 2 times [2020-10-26 19:52:58,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:58,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711426095] [2020-10-26 19:52:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:58,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4771 [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:53:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:53:03,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:53:03,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:03,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:03,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:53:03,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:03,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:03,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:03,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:03,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:03,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:03,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:53:03,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711426095] [2020-10-26 19:53:03,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:03,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:53:03,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543659429] [2020-10-26 19:53:03,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:53:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:53:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:53:03,141 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 8 states. [2020-10-26 19:53:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:03,706 INFO L93 Difference]: Finished difference Result 164 states and 194 transitions. [2020-10-26 19:53:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:53:03,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-26 19:53:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:03,711 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:53:03,712 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:53:03,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:53:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:53:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 76. [2020-10-26 19:53:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:53:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-26 19:53:03,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 47 [2020-10-26 19:53:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:03,760 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-26 19:53:03,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:53:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-26 19:53:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:53:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:03,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:03,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:53:03,765 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash -805632081, now seen corresponding path program 1 times [2020-10-26 19:53:03,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:03,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745392644] [2020-10-26 19:53:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:03,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:08,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:53:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:09,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:09,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:09,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:09,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:53:09,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:09,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:09,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:09,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:53:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:09,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:09,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:53:09,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745392644] [2020-10-26 19:53:09,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:09,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:53:09,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067544138] [2020-10-26 19:53:09,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:53:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:53:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:53:09,763 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 14 states. [2020-10-26 19:53:10,493 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:53:10,984 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-26 19:53:11,336 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-26 19:53:11,786 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-26 19:53:12,085 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-26 19:53:12,228 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-26 19:53:12,504 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-26 19:53:12,685 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-26 19:53:13,502 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-26 19:53:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:13,685 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2020-10-26 19:53:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:53:13,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-26 19:53:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:13,691 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:53:13,691 INFO L226 Difference]: Without dead ends: 161 [2020-10-26 19:53:13,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:53:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-26 19:53:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 108. [2020-10-26 19:53:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:53:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-26 19:53:13,737 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 48 [2020-10-26 19:53:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:13,738 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-26 19:53:13,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:53:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-26 19:53:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:53:13,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:13,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:13,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:53:13,745 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1117595953, now seen corresponding path program 1 times [2020-10-26 19:53:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:13,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144273180] [2020-10-26 19:53:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:18,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:53:18,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:18,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:53:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:18,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:18,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:53:18,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144273180] [2020-10-26 19:53:18,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:53:18,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:53:18,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524911683] [2020-10-26 19:53:18,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:53:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:53:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:18,844 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 4 states. [2020-10-26 19:53:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:18,985 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2020-10-26 19:53:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:53:18,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-26 19:53:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:18,987 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:53:18,987 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:53:18,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:53:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-26 19:53:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:53:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-26 19:53:19,026 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 48 [2020-10-26 19:53:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:19,027 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-26 19:53:19,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:53:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-26 19:53:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:53:19,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:19,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:19,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:53:19,031 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1557443164, now seen corresponding path program 3 times [2020-10-26 19:53:19,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:19,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689292004] [2020-10-26 19:53:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:23,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:23,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:24,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:53:24,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:24,813 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 44 [2020-10-26 19:53:25,027 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 31 [2020-10-26 19:53:25,322 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-26 19:53:25,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:25,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:25,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:25,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:25,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:25,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:25,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:53:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:53:26,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689292004] [2020-10-26 19:53:26,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:26,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:53:26,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902748991] [2020-10-26 19:53:26,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:53:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:53:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:53:26,068 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 18 states. [2020-10-26 19:53:28,026 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-26 19:53:28,868 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-26 19:53:29,352 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-26 19:53:29,561 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:53:30,149 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:53:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:30,913 INFO L93 Difference]: Finished difference Result 190 states and 222 transitions. [2020-10-26 19:53:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:53:30,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-26 19:53:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:30,917 INFO L225 Difference]: With dead ends: 190 [2020-10-26 19:53:30,917 INFO L226 Difference]: Without dead ends: 173 [2020-10-26 19:53:30,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:53:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-26 19:53:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 117. [2020-10-26 19:53:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:53:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-10-26 19:53:30,942 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 51 [2020-10-26 19:53:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:30,942 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-10-26 19:53:30,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:53:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-10-26 19:53:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:53:30,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:30,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:30,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:53:30,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 167381941, now seen corresponding path program 2 times [2020-10-26 19:53:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:30,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783680658] [2020-10-26 19:53:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:33,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:33,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:35,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:53:35,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:36,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:36,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:36,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:36,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:36,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:36,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:53:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:36,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:36,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:36,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:53:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:36,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:53:36,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783680658] [2020-10-26 19:53:36,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:36,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:53:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884308697] [2020-10-26 19:53:36,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:53:36,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:53:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:53:36,826 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 17 states. [2020-10-26 19:53:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:39,081 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2020-10-26 19:53:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:53:39,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-10-26 19:53:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:39,084 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:53:39,085 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:53:39,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:53:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:53:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2020-10-26 19:53:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-26 19:53:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2020-10-26 19:53:39,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 57 [2020-10-26 19:53:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:39,113 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2020-10-26 19:53:39,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:53:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2020-10-26 19:53:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:53:39,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:39,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:39,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:53:39,115 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash 362847993, now seen corresponding path program 3 times [2020-10-26 19:53:39,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:39,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919036961] [2020-10-26 19:53:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:53:44,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:53:44,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:44,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:44,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:44,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:53:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:53:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919036961] [2020-10-26 19:53:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:53:44,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181798984] [2020-10-26 19:53:44,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:53:44,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:44,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:53:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:53:44,713 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand 14 states. [2020-10-26 19:53:45,903 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:53:46,075 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-26 19:53:46,233 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-26 19:53:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:47,354 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2020-10-26 19:53:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:53:47,355 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-26 19:53:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:47,358 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:53:47,358 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:53:47,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:53:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:53:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 126. [2020-10-26 19:53:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:53:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2020-10-26 19:53:47,381 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 56 [2020-10-26 19:53:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:47,381 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2020-10-26 19:53:47,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:53:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2020-10-26 19:53:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:53:47,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:47,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:47,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:53:47,383 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -988774184, now seen corresponding path program 4 times [2020-10-26 19:53:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:47,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234031624] [2020-10-26 19:53:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:52,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:53:52,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:53:52,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:53:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:53:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:53:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:23,310 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 18 [2020-10-26 19:54:23,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:23,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:23,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:23,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:23,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:23,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:23,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:23,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:23,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:54:23,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234031624] [2020-10-26 19:54:23,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:23,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:54:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060928777] [2020-10-26 19:54:23,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:54:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:54:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:54:23,613 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand 9 states. [2020-10-26 19:54:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:24,086 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2020-10-26 19:54:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:54:24,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-26 19:54:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:24,089 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:54:24,089 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 19:54:24,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 13 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:54:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 19:54:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 107. [2020-10-26 19:54:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:54:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-10-26 19:54:24,113 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 59 [2020-10-26 19:54:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:24,113 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-10-26 19:54:24,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:54:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-10-26 19:54:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:54:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:24,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:24,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:54:24,115 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1653647712, now seen corresponding path program 4 times [2020-10-26 19:54:24,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:24,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605489146] [2020-10-26 19:54:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:24,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:25,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:29,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:29,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:54:29,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:29,731 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2020-10-26 19:54:30,191 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2020-10-26 19:54:30,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:30,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:30,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:54:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:30,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:30,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:30,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:30,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:54:30,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605489146] [2020-10-26 19:54:30,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:30,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:54:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219109977] [2020-10-26 19:54:30,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:54:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:54:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:54:30,744 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 17 states. [2020-10-26 19:54:31,018 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-26 19:54:32,096 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-26 19:54:32,403 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:54:32,613 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-26 19:54:32,875 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-26 19:54:33,167 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-26 19:54:33,493 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-26 19:54:33,758 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-26 19:54:34,155 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-26 19:54:34,531 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-26 19:54:34,784 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-26 19:54:35,105 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-26 19:54:35,269 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-26 19:54:36,199 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-26 19:54:36,468 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:54:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:37,190 INFO L93 Difference]: Finished difference Result 292 states and 351 transitions. [2020-10-26 19:54:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:54:37,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-10-26 19:54:37,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:37,194 INFO L225 Difference]: With dead ends: 292 [2020-10-26 19:54:37,194 INFO L226 Difference]: Without dead ends: 275 [2020-10-26 19:54:37,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:54:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-26 19:54:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 162. [2020-10-26 19:54:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:54:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-10-26 19:54:37,256 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 60 [2020-10-26 19:54:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:37,258 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-10-26 19:54:37,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:54:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-10-26 19:54:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:54:37,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:37,259 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:37,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:54:37,259 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:37,261 INFO L82 PathProgramCache]: Analyzing trace with hash 839844593, now seen corresponding path program 5 times [2020-10-26 19:54:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:37,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36580993] [2020-10-26 19:54:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:38,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:54:42,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:54:42,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:54:42,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:54:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:54:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:42,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:42,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:54:42,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:42,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:42,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:54:42,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:54:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:42,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:42,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:42,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:42,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:54:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:42,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:54:42,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:42,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:54:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:42,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:42,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:54:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36580993] [2020-10-26 19:54:42,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:42,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:54:42,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548592646] [2020-10-26 19:54:42,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:54:42,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:54:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:54:42,689 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 11 states. [2020-10-26 19:54:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:43,706 INFO L93 Difference]: Finished difference Result 199 states and 228 transitions. [2020-10-26 19:54:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:54:43,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-26 19:54:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:43,711 INFO L225 Difference]: With dead ends: 199 [2020-10-26 19:54:43,711 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:54:43,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:54:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:54:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2020-10-26 19:54:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:54:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2020-10-26 19:54:43,746 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 66 [2020-10-26 19:54:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:43,746 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2020-10-26 19:54:43,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:54:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2020-10-26 19:54:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:54:43,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:43,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-26 19:54:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:54:43,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1510948572, now seen corresponding path program 6 times [2020-10-26 19:54:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140785003] [2020-10-26 19:54:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:47,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:48,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:48,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:54:48,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 19:54:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:49,622 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-26 19:54:49,804 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 31 [2020-10-26 19:54:50,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:50,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:50,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:50,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:50,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:50,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:50,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:50,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:54:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:50,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:50,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:50,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:50,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:50,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:54:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:54:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140785003] [2020-10-26 19:54:50,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:50,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:54:50,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565077412] [2020-10-26 19:54:50,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:54:50,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:54:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:54:50,049 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand 21 states. [2020-10-26 19:54:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:52,922 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2020-10-26 19:54:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:54:52,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-10-26 19:54:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:52,927 INFO L225 Difference]: With dead ends: 174 [2020-10-26 19:54:52,927 INFO L226 Difference]: Without dead ends: 171 [2020-10-26 19:54:52,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:54:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-26 19:54:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2020-10-26 19:54:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-26 19:54:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2020-10-26 19:54:52,964 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 69 [2020-10-26 19:54:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:52,965 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2020-10-26 19:54:52,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:54:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2020-10-26 19:54:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:54:52,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:52,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:52,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:54:52,966 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1607279018, now seen corresponding path program 7 times [2020-10-26 19:54:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492684845] [2020-10-26 19:54:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:57,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:57,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:54:57,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:54:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:54:57,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:54:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:54:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:54:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:58,884 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-10-26 19:54:59,042 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-10-26 19:54:59,578 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 47 [2020-10-26 19:55:00,139 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 44 [2020-10-26 19:55:00,605 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 59 [2020-10-26 19:55:00,953 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 22 [2020-10-26 19:55:01,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:01,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:01,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:01,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:01,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:01,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:01,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:01,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:01,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:01,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:01,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:01,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:55:01,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:55:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:01,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:01,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:01,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:01,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:01,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:55:01,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:01,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:01,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:01,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:01,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:55:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492684845] [2020-10-26 19:55:01,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:01,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:55:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387182737] [2020-10-26 19:55:01,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:55:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:55:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:55:01,605 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand 22 states. [2020-10-26 19:55:01,804 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-26 19:55:02,670 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-26 19:55:03,017 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2020-10-26 19:55:03,410 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-26 19:55:03,687 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-26 19:55:04,047 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-26 19:55:04,451 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-26 19:55:04,868 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-10-26 19:55:05,064 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-26 19:55:05,468 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-26 19:55:05,906 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-26 19:55:06,712 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-26 19:55:07,045 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-26 19:55:07,188 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-26 19:55:07,411 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-26 19:55:07,651 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-26 19:55:08,246 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-26 19:55:08,481 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-26 19:55:09,462 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-26 19:55:09,669 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-26 19:55:10,076 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-26 19:55:10,236 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-26 19:55:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:11,630 INFO L93 Difference]: Finished difference Result 398 states and 480 transitions. [2020-10-26 19:55:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:55:11,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-10-26 19:55:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:11,635 INFO L225 Difference]: With dead ends: 398 [2020-10-26 19:55:11,635 INFO L226 Difference]: Without dead ends: 357 [2020-10-26 19:55:11,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=789, Invalid=4467, Unknown=0, NotChecked=0, Total=5256 [2020-10-26 19:55:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-26 19:55:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 213. [2020-10-26 19:55:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-26 19:55:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2020-10-26 19:55:11,680 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 68 [2020-10-26 19:55:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:11,680 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2020-10-26 19:55:11,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:55:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2020-10-26 19:55:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:55:11,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:11,690 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:11,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:55:11,690 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1970781327, now seen corresponding path program 8 times [2020-10-26 19:55:11,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:11,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956735204] [2020-10-26 19:55:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:11,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:13,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:14,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:16,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:55:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:17,469 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-10-26 19:55:17,756 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 30 [2020-10-26 19:55:17,993 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2020-10-26 19:55:18,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:18,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:18,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:18,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:18,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:55:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:18,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:55:18,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956735204] [2020-10-26 19:55:18,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:18,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:55:18,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415011370] [2020-10-26 19:55:18,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:55:18,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:55:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:55:18,966 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand 18 states. [2020-10-26 19:55:20,164 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-26 19:55:20,489 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-26 19:55:20,881 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-26 19:55:21,360 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-26 19:55:21,603 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-26 19:55:21,773 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-26 19:55:22,291 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-26 19:55:22,613 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-26 19:55:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:23,549 INFO L93 Difference]: Finished difference Result 294 states and 342 transitions. [2020-10-26 19:55:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:55:23,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-26 19:55:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:23,552 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:55:23,552 INFO L226 Difference]: Without dead ends: 267 [2020-10-26 19:55:23,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:55:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-26 19:55:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 204. [2020-10-26 19:55:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-26 19:55:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2020-10-26 19:55:23,598 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 72 [2020-10-26 19:55:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:23,598 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2020-10-26 19:55:23,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:55:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2020-10-26 19:55:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:55:23,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:23,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-10-26 19:55:23,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:55:23,600 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2085881246, now seen corresponding path program 9 times [2020-10-26 19:55:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:23,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088538421] [2020-10-26 19:55:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:23,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:28,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:28,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:55:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:29,122 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2020-10-26 19:55:29,355 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-10-26 19:55:29,729 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2020-10-26 19:55:30,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:30,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:30,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:30,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:30,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:30,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:30,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:30,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:55:30,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:30,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:55:30,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:30,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:55:30,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:55:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:30,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:30,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:30,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:55:30,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:30,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:55:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:30,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:30,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:30,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:55:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:30,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:30,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:30,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:30,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:30,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:30,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 19:55:30,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088538421] [2020-10-26 19:55:30,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:30,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:55:30,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017745454] [2020-10-26 19:55:30,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:55:30,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:55:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:55:30,550 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand 19 states. [2020-10-26 19:55:34,057 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-26 19:55:35,092 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-26 19:55:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:36,730 INFO L93 Difference]: Finished difference Result 316 states and 361 transitions. [2020-10-26 19:55:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:55:36,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-26 19:55:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:36,738 INFO L225 Difference]: With dead ends: 316 [2020-10-26 19:55:36,738 INFO L226 Difference]: Without dead ends: 299 [2020-10-26 19:55:36,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=587, Invalid=3445, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:55:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-26 19:55:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 241. [2020-10-26 19:55:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-26 19:55:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 275 transitions. [2020-10-26 19:55:36,811 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 275 transitions. Word has length 78 [2020-10-26 19:55:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:36,812 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 275 transitions. [2020-10-26 19:55:36,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:55:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 275 transitions. [2020-10-26 19:55:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:55:36,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:36,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:36,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:55:36,814 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1613558794, now seen corresponding path program 10 times [2020-10-26 19:55:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19666814] [2020-10-26 19:55:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:36,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:36,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:37,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:41,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:55:41,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:42,588 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-26 19:55:42,718 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-26 19:55:43,077 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-26 19:55:43,279 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-26 19:55:43,476 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2020-10-26 19:55:43,722 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-26 19:55:44,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:44,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:44,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:55:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:44,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:44,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:44,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:44,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:44,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:44,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:55:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:44,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:44,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:44,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:44,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:44,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:55:44,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:55:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:55:44,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:55:44,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19666814] [2020-10-26 19:55:44,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:44,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:55:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867101061] [2020-10-26 19:55:44,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:55:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:55:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:55:44,726 INFO L87 Difference]: Start difference. First operand 241 states and 275 transitions. Second operand 21 states. [2020-10-26 19:55:44,884 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 8 [2020-10-26 19:55:45,207 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2020-10-26 19:55:46,762 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-26 19:55:47,036 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-26 19:55:47,357 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-26 19:55:47,652 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-26 19:55:48,085 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-26 19:55:48,586 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:55:48,918 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-26 19:55:49,212 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-26 19:55:49,598 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-26 19:55:50,055 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-26 19:55:50,245 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:55:50,587 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-26 19:55:51,278 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:55:51,581 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-26 19:55:51,811 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-26 19:55:52,158 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-26 19:55:52,839 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:55:53,044 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-26 19:55:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:53,296 INFO L93 Difference]: Finished difference Result 370 states and 438 transitions. [2020-10-26 19:55:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:55:53,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-26 19:55:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:53,300 INFO L225 Difference]: With dead ends: 370 [2020-10-26 19:55:53,300 INFO L226 Difference]: Without dead ends: 353 [2020-10-26 19:55:53,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:55:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-26 19:55:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 245. [2020-10-26 19:55:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-26 19:55:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 280 transitions. [2020-10-26 19:55:53,373 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 280 transitions. Word has length 76 [2020-10-26 19:55:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:53,373 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 280 transitions. [2020-10-26 19:55:53,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:55:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 280 transitions. [2020-10-26 19:55:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:55:53,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:53,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-10-26 19:55:53,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:55:53,375 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash 234874387, now seen corresponding path program 11 times [2020-10-26 19:55:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:53,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758970973] [2020-10-26 19:55:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:53,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:55,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:56,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:55:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:55:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:55:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:55:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:55:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 19:55:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:58,841 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 10 [2020-10-26 19:55:59,172 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 9 [2020-10-26 19:55:59,347 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-10-26 19:55:59,648 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2020-10-26 19:55:59,944 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 42 [2020-10-26 19:56:00,188 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2020-10-26 19:56:00,446 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-26 19:56:00,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:56:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:00,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:56:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:56:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:56:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:56:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:00,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:56:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:00,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:56:00,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:56:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:00,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:56:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:56:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:56:00,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:56:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:56:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:56:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 19:56:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758970973] [2020-10-26 19:56:00,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:56:00,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:56:00,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089038186] [2020-10-26 19:56:00,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:56:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:56:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:56:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:56:00,949 INFO L87 Difference]: Start difference. First operand 245 states and 280 transitions. Second operand 26 states.