/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/reducercommutativity/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:17:42,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:17:42,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:17:43,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:17:43,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:17:43,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:17:43,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:17:43,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:17:43,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:17:43,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:17:43,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:17:43,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:17:43,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:17:43,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:17:43,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:17:43,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:17:43,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:17:43,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:17:43,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:17:43,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:17:43,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:17:43,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:17:43,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:17:43,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:17:43,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:17:43,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:17:43,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:17:43,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:17:43,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:17:43,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:17:43,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:17:43,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:17:43,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:17:43,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:17:43,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:17:43,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:17:43,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:17:43,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:17:43,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:17:43,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:17:43,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:17:43,119 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 [2020-10-29 12:17:43,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:17:43,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:17:43,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:17:43,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:17:43,155 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:17:43,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:17:43,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:17:43,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:17:43,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:17:43,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:17:43,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:17:43,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:17:43,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:17:43,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:17:43,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:17:43,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:17:43,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:17:43,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:17:43,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:17:43,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:17:43,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:17:43,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:17:43,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:17:43,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:17:43,610 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:17:43,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2020-10-29 12:17:43,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a92efac/90c2cf4eb736479e9ab1205277191f77/FLAGf7d2629f3 [2020-10-29 12:17:44,313 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:17:44,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sum.i [2020-10-29 12:17:44,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a92efac/90c2cf4eb736479e9ab1205277191f77/FLAGf7d2629f3 [2020-10-29 12:17:44,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06a92efac/90c2cf4eb736479e9ab1205277191f77 [2020-10-29 12:17:44,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:17:44,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:17:44,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:17:44,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:17:44,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:17:44,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:44,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741bb448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44, skipping insertion in model container [2020-10-29 12:17:44,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:44,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:17:44,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:17:44,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:17:44,881 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:17:44,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:17:44,925 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:17:44,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44 WrapperNode [2020-10-29 12:17:44,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:17:44,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:17:44,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:17:44,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:17:44,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:44,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:44,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:44,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:45,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:45,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:45,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (1/1) ... [2020-10-29 12:17:45,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:17:45,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:17:45,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:17:45,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:17:45,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (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 [2020-10-29 12:17:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:17:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:17:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:17:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-29 12:17:45,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:17:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:17:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:17:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 12:17:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 12:17:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:17:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:17:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:17:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:17:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:17:45,715 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:17:45,716 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 12:17:45,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:17:45 BoogieIcfgContainer [2020-10-29 12:17:45,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:17:45,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:17:45,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:17:45,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:17:45,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:17:44" (1/3) ... [2020-10-29 12:17:45,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338cdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:17:45, skipping insertion in model container [2020-10-29 12:17:45,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:17:44" (2/3) ... [2020-10-29 12:17:45,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338cdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:17:45, skipping insertion in model container [2020-10-29 12:17:45,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:17:45" (3/3) ... [2020-10-29 12:17:45,733 INFO L111 eAbstractionObserver]: Analyzing ICFG sum.i [2020-10-29 12:17:45,748 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:17:45,755 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:17:45,771 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:17:45,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:17:45,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:17:45,818 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:17:45,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:17:45,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:17:45,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:17:45,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:17:45,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:17:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-29 12:17:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 12:17:45,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:17:45,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:17:45,858 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:17:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:17:45,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1722685754, now seen corresponding path program 1 times [2020-10-29 12:17:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:17:45,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422665402] [2020-10-29 12:17:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:17:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:46,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:46,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:46,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:48,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 12:17:48,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:17:48,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-29 12:17:48,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:48,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:17:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 12:17:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 12:17:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 12:17:48,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:17:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:48,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:17:48,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:17:48,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 12:17:48,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:48,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:17:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:48,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:17:48,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:17:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:17:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:48,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:48,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:48,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 12:17:48,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:48,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:17:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-29 12:17:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:48,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:48,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:48,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:48,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 12:17:48,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:48,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:17:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:17:48,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 12:17:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:48,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:48,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 12:17:48,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:48,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:48,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:17:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-29 12:17:48,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:17:48,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 12:17:48,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422665402] [2020-10-29 12:17:48,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:17:48,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:17:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425857804] [2020-10-29 12:17:48,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:17:48,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:17:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:17:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:17:48,370 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-10-29 12:17:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:17:48,637 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-10-29 12:17:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:17:48,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-29 12:17:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:17:48,650 INFO L225 Difference]: With dead ends: 66 [2020-10-29 12:17:48,650 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 12:17:48,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:17:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 12:17:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 12:17:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 12:17:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-29 12:17:48,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 34 [2020-10-29 12:17:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:17:48,707 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-29 12:17:48,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:17:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-29 12:17:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 12:17:48,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:17:48,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:17:48,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:17:48,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:17:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:17:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash 83856114, now seen corresponding path program 1 times [2020-10-29 12:17:48,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:17:48,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137317198] [2020-10-29 12:17:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:17:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:49,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:49,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:51,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 12:17:51,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:17:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-29 12:17:51,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:51,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:17:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 12:17:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 12:17:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:17:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:51,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:17:51,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:17:51,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 12:17:51,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:51,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:51,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:17:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:17:51,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:51,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:17:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:51,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:51,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 12:17:51,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:51,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:17:51,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:51,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-29 12:17:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:51,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:51,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:51,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 12:17:51,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:51,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:17:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 12:17:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:51,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:51,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 12:17:51,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:17:51,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 12:17:51,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:51,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:51,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:17:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 12:17:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 12:17:51,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 12:17:51,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137317198] [2020-10-29 12:17:51,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:17:51,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:17:51,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253972718] [2020-10-29 12:17:51,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:17:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:17:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:17:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:17:51,463 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-29 12:17:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:17:51,808 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-29 12:17:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 12:17:51,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-29 12:17:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:17:51,811 INFO L225 Difference]: With dead ends: 50 [2020-10-29 12:17:51,811 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 12:17:51,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:17:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 12:17:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-29 12:17:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 12:17:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-29 12:17:51,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 36 [2020-10-29 12:17:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:17:51,834 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-29 12:17:51,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:17:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-29 12:17:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 12:17:51,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:17:51,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:17:51,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:17:51,843 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:17:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:17:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -518486128, now seen corresponding path program 1 times [2020-10-29 12:17:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:17:51,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542516883] [2020-10-29 12:17:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:17:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:51,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:52,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:55,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 12:17:55,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 12:17:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3672 [2020-10-29 12:17:55,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:55,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:17:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 12:17:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 12:17:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:17:55,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:17:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:55,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:55,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:17:55,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:17:55,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 12:17:55,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:55,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:55,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:17:55,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:55,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:17:55,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:55,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:17:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:55,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:55,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 12:17:55,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:55,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 12:17:55,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:55,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 12:17:55,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 12:17:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:55,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 12:17:55,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:17:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 12:17:55,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:55,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:17:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:17:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 12:17:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 12:17:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:55,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:55,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:17:55,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 12:17:55,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:17:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 12:17:55,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:17:55,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:17:55,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:17:55,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 12:17:55,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 12:17:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:17:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-29 12:17:55,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542516883] [2020-10-29 12:17:55,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:17:55,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 12:17:55,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430652474] [2020-10-29 12:17:55,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 12:17:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:17:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 12:17:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:17:55,811 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-10-29 12:17:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:17:56,161 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-29 12:17:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 12:17:56,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-29 12:17:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:17:56,163 INFO L225 Difference]: With dead ends: 53 [2020-10-29 12:17:56,163 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 12:17:56,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-29 12:17:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 12:17:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-29 12:17:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 12:17:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-29 12:17:56,182 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 42 [2020-10-29 12:17:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:17:56,183 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-29 12:17:56,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 12:17:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-29 12:17:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 12:17:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:17:56,187 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:17:56,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:17:56,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:17:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:17:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash -116435538, now seen corresponding path program 2 times [2020-10-29 12:17:56,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:17:56,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452364461] [2020-10-29 12:17:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:17:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:17:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:17:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:00,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:01,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:01,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 12:18:01,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:18:01,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5467 [2020-10-29 12:18:01,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:01,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:01,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 12:18:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 12:18:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 12:18:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:18:02,619 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-29 12:18:02,804 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-29 12:18:02,971 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 12:18:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:18:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:03,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:03,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:03,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:18:03,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 12:18:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:03,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:18:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:18:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:18:03,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:18:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:03,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:03,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:03,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 12:18:03,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:03,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 12:18:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:18:03,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:18:03,869 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-29 12:18:03,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 12:18:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:04,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:04,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:04,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:04,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 12:18:04,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:04,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:04,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 12:18:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:18:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:18:04,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 12:18:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:04,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:04,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:04,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 12:18:04,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:04,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 12:18:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:18:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:18:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 12:18:05,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452364461] [2020-10-29 12:18:05,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:18:05,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 12:18:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115041530] [2020-10-29 12:18:05,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 12:18:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:18:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 12:18:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-29 12:18:05,518 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 24 states. [2020-10-29 12:18:06,567 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 12:18:07,046 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 80 [2020-10-29 12:18:10,025 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-29 12:18:17,329 WARN L193 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-29 12:18:18,456 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-29 12:18:23,881 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 116 DAG size of output: 108 [2020-10-29 12:18:30,992 WARN L193 SmtUtils]: Spent 6.86 s on a formula simplification. DAG size of input: 113 DAG size of output: 108 [2020-10-29 12:18:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:18:31,217 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-29 12:18:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 12:18:31,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-29 12:18:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:18:31,223 INFO L225 Difference]: With dead ends: 55 [2020-10-29 12:18:31,223 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 12:18:31,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 12:18:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 12:18:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-29 12:18:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 12:18:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-29 12:18:31,243 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 48 [2020-10-29 12:18:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:18:31,244 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-29 12:18:31,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 12:18:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-29 12:18:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 12:18:31,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:18:31,246 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:18:31,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 12:18:31,246 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:18:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:18:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1415224692, now seen corresponding path program 3 times [2020-10-29 12:18:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:18:31,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539712508] [2020-10-29 12:18:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:18:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:31,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:31,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:36,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 12:18:36,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 12:18:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 12:18:36,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:36,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:36,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 12:18:36,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:18:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 12:18:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:18:36,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:18:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:36,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:18:36,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:18:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:18:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:36,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:36,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 12:18:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:18:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 12:18:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:36,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:36,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:18:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 12:18:36,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:36,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:18:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 12:18:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 12:18:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:36,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:36,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:36,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:36,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 12:18:36,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:36,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:18:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:18:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:18:36,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-29 12:18:36,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539712508] [2020-10-29 12:18:36,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:18:36,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 12:18:36,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385675863] [2020-10-29 12:18:36,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 12:18:36,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:18:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 12:18:36,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:18:36,497 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 9 states. [2020-10-29 12:18:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:18:37,077 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-10-29 12:18:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 12:18:37,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-29 12:18:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:18:37,082 INFO L225 Difference]: With dead ends: 87 [2020-10-29 12:18:37,082 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 12:18:37,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-29 12:18:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 12:18:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-10-29 12:18:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 12:18:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-10-29 12:18:37,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 50 [2020-10-29 12:18:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:18:37,100 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-10-29 12:18:37,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 12:18:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-10-29 12:18:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 12:18:37,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:18:37,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:18:37,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 12:18:37,102 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:18:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:18:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1604914700, now seen corresponding path program 4 times [2020-10-29 12:18:37,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:18:37,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895921216] [2020-10-29 12:18:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:18:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:37,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:37,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:42,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 12:18:42,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 12:18:42,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 12:18:42,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:42,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 12:18:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:18:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 12:18:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:42,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:18:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:42,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:18:42,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:42,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 12:18:42,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:42,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:18:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:18:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:18:42,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:18:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:42,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 12:18:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:42,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 12:18:42,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 12:18:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:42,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:18:42,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:18:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 12:18:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:42,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:18:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:18:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 12:18:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:42,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 12:18:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:42,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:42,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:42,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:18:42,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:18:42,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:18:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 12:18:42,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895921216] [2020-10-29 12:18:42,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:18:42,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 12:18:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853104415] [2020-10-29 12:18:42,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 12:18:42,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:18:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 12:18:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 12:18:42,365 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 11 states. [2020-10-29 12:18:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:18:43,207 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-10-29 12:18:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 12:18:43,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-29 12:18:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:18:43,209 INFO L225 Difference]: With dead ends: 97 [2020-10-29 12:18:43,209 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 12:18:43,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 12:18:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 12:18:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-29 12:18:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 12:18:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-29 12:18:43,224 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 50 [2020-10-29 12:18:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:18:43,225 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-29 12:18:43,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 12:18:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-29 12:18:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 12:18:43,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:18:43,226 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-29 12:18:43,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 12:18:43,227 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:18:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:18:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1048855980, now seen corresponding path program 5 times [2020-10-29 12:18:43,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:18:43,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716945575] [2020-10-29 12:18:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:18:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:18:43,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:47,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:18:48,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5321 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 12:18:48,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 12:18:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 12:18:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:18:49,167 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-29 12:18:49,508 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-29 12:18:49,725 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-29 12:18:49,960 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-29 12:19:09,261 WARN L193 SmtUtils]: Spent 19.21 s on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-29 12:19:09,492 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 12:19:09,722 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-29 12:19:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:19:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:09,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:19:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:19:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:09,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:19:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:09,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:09,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:19:09,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:19:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:10,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 12:19:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:10,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 12:19:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:19:10,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:11,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 12:19:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:11,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:11,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 12:19:11,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:11,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 12:19:11,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:12,086 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 12:19:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 12:19:12,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716945575] [2020-10-29 12:19:12,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:19:12,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 12:19:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851214001] [2020-10-29 12:19:12,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 12:19:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:19:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 12:19:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-29 12:19:12,124 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 24 states. [2020-10-29 12:19:25,042 WARN L193 SmtUtils]: Spent 12.78 s on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-10-29 12:19:26,391 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-10-29 12:19:27,063 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 12:19:27,662 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2020-10-29 12:19:30,527 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-29 12:19:31,553 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-29 12:19:39,097 WARN L193 SmtUtils]: Spent 6.64 s on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-29 12:19:41,838 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-29 12:19:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:19:41,955 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-29 12:19:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 12:19:41,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-29 12:19:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:19:41,957 INFO L225 Difference]: With dead ends: 66 [2020-10-29 12:19:41,957 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 12:19:41,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 12:19:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 12:19:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-29 12:19:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 12:19:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-29 12:19:41,966 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 50 [2020-10-29 12:19:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:19:41,966 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-29 12:19:41,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 12:19:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-29 12:19:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 12:19:41,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:19:41,968 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-10-29 12:19:41,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 12:19:41,968 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:19:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:19:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1194618314, now seen corresponding path program 6 times [2020-10-29 12:19:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:19:41,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454274963] [2020-10-29 12:19:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:19:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:43,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:44,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:45,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5367 [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:47,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 12:19:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 12:19:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 12:19:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:47,705 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 12:19:48,091 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-29 12:19:48,351 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 12:19:48,635 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-29 12:19:48,893 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 12:19:49,152 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-29 12:19:49,403 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-29 12:19:49,610 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-29 12:19:49,846 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-29 12:19:50,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:19:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:50,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:50,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:50,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:19:50,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:19:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:50,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:50,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 12:19:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:19:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:51,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 12:19:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:51,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:51,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:19:51,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-29 12:19:51,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:51,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:51,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 12:19:51,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:51,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:19:51,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:52,131 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-10-29 12:19:52,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 12:19:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:19:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 12:19:52,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:19:52,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:19:52,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:19:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 12:19:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454274963] [2020-10-29 12:19:53,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:19:53,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 12:19:53,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051872093] [2020-10-29 12:19:53,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 12:19:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:19:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 12:19:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 12:19:53,290 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 34 states. [2020-10-29 12:19:55,034 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-29 12:19:55,494 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-29 12:19:55,967 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-29 12:19:58,598 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-29 12:19:59,114 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-29 12:20:05,891 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-29 12:20:08,402 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-29 12:20:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:20:08,633 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-29 12:20:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 12:20:08,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-10-29 12:20:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:20:08,636 INFO L225 Difference]: With dead ends: 61 [2020-10-29 12:20:08,636 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 12:20:08,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 12:20:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 12:20:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-29 12:20:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 12:20:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-29 12:20:08,663 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 56 [2020-10-29 12:20:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:20:08,665 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-29 12:20:08,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 12:20:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-29 12:20:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 12:20:08,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:20:08,673 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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] [2020-10-29 12:20:08,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 12:20:08,675 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:20:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:20:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash -866730840, now seen corresponding path program 7 times [2020-10-29 12:20:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:20:08,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156617781] [2020-10-29 12:20:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:20:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 12:20:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:20:13,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 12:20:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:20:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:13,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:13,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:20:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:20:13,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:13,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:20:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:13,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:20:13,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:13,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 12:20:13,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:13,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:20:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 12:20:13,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:13,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 12:20:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:13,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:20:13,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:13,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 12:20:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 12:20:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:13,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:20:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 12:20:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:20:13,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-29 12:20:13,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156617781] [2020-10-29 12:20:13,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:20:13,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 12:20:13,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074913503] [2020-10-29 12:20:13,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 12:20:13,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:20:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 12:20:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 12:20:13,939 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 11 states. [2020-10-29 12:20:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:20:14,651 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-29 12:20:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 12:20:14,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-29 12:20:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:20:14,655 INFO L225 Difference]: With dead ends: 97 [2020-10-29 12:20:14,655 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 12:20:14,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-29 12:20:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 12:20:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-29 12:20:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 12:20:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-29 12:20:14,692 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 58 [2020-10-29 12:20:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:20:14,693 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-29 12:20:14,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 12:20:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-29 12:20:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 12:20:14,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:20:14,696 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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] [2020-10-29 12:20:14,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 12:20:14,696 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:20:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:20:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1192718552, now seen corresponding path program 8 times [2020-10-29 12:20:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:20:14,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736104137] [2020-10-29 12:20:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:20:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:14,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:19,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 12:20:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:20:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 12:20:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:20:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:19,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:20:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:20:19,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:19,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:20:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:19,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:19,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 12:20:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:19,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 12:20:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:19,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:19,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:19,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 12:20:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:19,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 12:20:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:19,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:19,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:20:19,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:20:19,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 12:20:20,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736104137] [2020-10-29 12:20:20,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:20:20,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 12:20:20,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822218418] [2020-10-29 12:20:20,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 12:20:20,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:20:20,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 12:20:20,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 12:20:20,014 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 13 states. [2020-10-29 12:20:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:20:21,173 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-29 12:20:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 12:20:21,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-29 12:20:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:20:21,176 INFO L225 Difference]: With dead ends: 111 [2020-10-29 12:20:21,176 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 12:20:21,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-10-29 12:20:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 12:20:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-29 12:20:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 12:20:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-29 12:20:21,195 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 58 [2020-10-29 12:20:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:20:21,196 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-29 12:20:21,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 12:20:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-29 12:20:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 12:20:21,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:20:21,197 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:20:21,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 12:20:21,197 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:20:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:20:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1305763528, now seen corresponding path program 9 times [2020-10-29 12:20:21,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:20:21,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697626622] [2020-10-29 12:20:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:20:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:26,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 12:20:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 12:20:26,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:29,083 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 12:20:29,227 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-29 12:20:29,480 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-29 12:20:29,790 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-10-29 12:20:32,637 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-29 12:20:32,964 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-29 12:20:33,435 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-29 12:20:33,761 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 12:20:34,052 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-29 12:20:34,304 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-29 12:20:34,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:20:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:34,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:34,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:20:34,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:34,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:20:34,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 12:20:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:34,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:34,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:34,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:34,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 12:20:34,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:34,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 12:20:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:20:34,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:35,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 12:20:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:35,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:35,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:35,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:35,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:20:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:37,047 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-29 12:20:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-29 12:20:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:20:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:20:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:20:42,592 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-29 12:20:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 7 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 12:20:42,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697626622] [2020-10-29 12:20:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 12:20:42,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 12:20:42,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753933806] [2020-10-29 12:20:42,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 12:20:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:20:42,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 12:20:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 12:20:42,630 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 36 states. [2020-10-29 12:20:43,323 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-29 12:20:48,839 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 12:20:49,077 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 12:20:49,447 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 12:20:49,897 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2020-10-29 12:20:51,519 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2020-10-29 12:20:59,364 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 117 DAG size of output: 84 [2020-10-29 12:21:03,067 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 116 DAG size of output: 111 [2020-10-29 12:21:08,310 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-29 12:21:11,293 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-29 12:21:19,948 WARN L193 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2020-10-29 12:21:25,981 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2020-10-29 12:21:36,422 WARN L193 SmtUtils]: Spent 7.20 s on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-29 12:21:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:21:38,627 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-29 12:21:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 12:21:38,628 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 58 [2020-10-29 12:21:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:21:38,630 INFO L225 Difference]: With dead ends: 81 [2020-10-29 12:21:38,630 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 12:21:38,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=236, Invalid=2843, Unknown=1, NotChecked=0, Total=3080 [2020-10-29 12:21:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 12:21:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-29 12:21:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 12:21:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-29 12:21:38,648 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 58 [2020-10-29 12:21:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:21:38,649 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-29 12:21:38,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 12:21:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-29 12:21:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 12:21:38,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:21:38,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:21:38,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 12:21:38,650 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:21:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:21:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 742131782, now seen corresponding path program 10 times [2020-10-29 12:21:38,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:21:38,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901439913] [2020-10-29 12:21:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:21:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:21:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:21:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:21:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:21:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:21:39,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:21:39,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking...