/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:36,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:36,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:37,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:37,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:37,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:37,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:37,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:37,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:37,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:37,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:37,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:37,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:37,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:37,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:37,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:37,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:37,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:37,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:37,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:37,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:37,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:37,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:37,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:37,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:37,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:37,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:37,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:37,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:37,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:37,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:37,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:37,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:37,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:37,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:37,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:37,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:37,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:37,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:37,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:37,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:37,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:13:37,176 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:37,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:37,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:37,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:37,181 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:37,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:37,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:37,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:37,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:37,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:37,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:37,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:37,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:37,184 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:37,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:37,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:37,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:37,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:37,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:37,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:37,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:37,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:37,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:37,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:37,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:37,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:37,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:37,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:37,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:37,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:37,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:37,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:37,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:37,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:37,722 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:37,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-26 19:13:37,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca899c992/deb4932f80444a3880d4218b6e49d2b8/FLAGa1f133c0b [2020-10-26 19:13:38,559 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:38,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-26 19:13:38,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca899c992/deb4932f80444a3880d4218b6e49d2b8/FLAGa1f133c0b [2020-10-26 19:13:38,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca899c992/deb4932f80444a3880d4218b6e49d2b8 [2020-10-26 19:13:38,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:38,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:38,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:38,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:38,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:38,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:38" (1/1) ... [2020-10-26 19:13:38,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612345cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:38, skipping insertion in model container [2020-10-26 19:13:38,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:38" (1/1) ... [2020-10-26 19:13:38,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:39,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:39,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:39,237 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:39,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:39,282 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:39,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39 WrapperNode [2020-10-26 19:13:39,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:39,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:39,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:39,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:39,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... [2020-10-26 19:13:39,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:39,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:39,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:39,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:39,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:39,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:39,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:39,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:39,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:39,932 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:39,932 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:13:39,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:39 BoogieIcfgContainer [2020-10-26 19:13:39,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:39,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:39,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:39,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:39,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:38" (1/3) ... [2020-10-26 19:13:39,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acafd1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:39, skipping insertion in model container [2020-10-26 19:13:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:39" (2/3) ... [2020-10-26 19:13:39,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acafd1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:39, skipping insertion in model container [2020-10-26 19:13:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:39" (3/3) ... [2020-10-26 19:13:39,944 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2020-10-26 19:13:39,958 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:39,965 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:39,980 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:40,010 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:40,010 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:40,010 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:40,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:40,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:40,011 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:40,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:40,011 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:13:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:40,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:40,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:40,037 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1497277457, now seen corresponding path program 1 times [2020-10-26 19:13:40,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:40,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978679338] [2020-10-26 19:13:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:40,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 19:13:40,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:40,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:40,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:40,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:13:40,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:40,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978679338] [2020-10-26 19:13:40,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:40,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363890490] [2020-10-26 19:13:40,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:40,533 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-26 19:13:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:40,644 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-26 19:13:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:40,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-26 19:13:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:40,654 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:13:40,655 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:13:40,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:13:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:13:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:13:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-26 19:13:40,702 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-26 19:13:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:40,702 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-26 19:13:40,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-26 19:13:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:40,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:40,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:40,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:40,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash 947624462, now seen corresponding path program 1 times [2020-10-26 19:13:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:40,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416774987] [2020-10-26 19:13:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:40,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:40,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-26 19:13:40,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:13:40,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:40,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:13:40,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:41,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:41,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:41,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:41,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:41,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:41,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:41,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:41,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:41,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416774987] [2020-10-26 19:13:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:13:41,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785973356] [2020-10-26 19:13:41,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:13:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:13:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:41,032 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-26 19:13:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:41,124 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-26 19:13:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:13:41,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-26 19:13:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:41,126 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:13:41,126 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:13:41,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:13:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-26 19:13:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:13:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-26 19:13:41,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-10-26 19:13:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:41,139 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-26 19:13:41,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:13:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-26 19:13:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:13:41,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:41,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:41,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:41,141 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash -196258576, now seen corresponding path program 1 times [2020-10-26 19:13:41,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:41,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302984019] [2020-10-26 19:13:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:41,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:13:41,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:41,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-26 19:13:41,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:41,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:41,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:41,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:41,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:41,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:41,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302984019] [2020-10-26 19:13:41,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:41,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:41,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245063309] [2020-10-26 19:13:41,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:41,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:41,534 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-26 19:13:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:41,634 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-26 19:13:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:41,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-26 19:13:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:41,636 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:13:41,636 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:13:41,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:13:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:13:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:13:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-26 19:13:41,646 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-10-26 19:13:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:41,647 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-26 19:13:41,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-26 19:13:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:13:41,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:41,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:41,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:41,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 43769682, now seen corresponding path program 2 times [2020-10-26 19:13:41,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:41,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963984258] [2020-10-26 19:13:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:41,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:13:41,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:41,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-26 19:13:41,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:41,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:42,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:42,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:42,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:13:42,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:13:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963984258] [2020-10-26 19:13:42,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:42,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:42,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521990652] [2020-10-26 19:13:42,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:42,073 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-10-26 19:13:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:42,198 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-26 19:13:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:42,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:13:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:42,202 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:13:42,202 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:13:42,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:13:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:13:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:13:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-26 19:13:42,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 22 [2020-10-26 19:13:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:42,232 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-26 19:13:42,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-26 19:13:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:13:42,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:42,236 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:42,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:42,236 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1217308364, now seen corresponding path program 3 times [2020-10-26 19:13:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:42,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053696723] [2020-10-26 19:13:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:42,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:42,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:13:42,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:42,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-26 19:13:42,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:42,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:13:42,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:42,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:13:42,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:42,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:42,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:42,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:42,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:42,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053696723] [2020-10-26 19:13:42,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:42,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:13:42,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580789366] [2020-10-26 19:13:42,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:13:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:13:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:42,593 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-10-26 19:13:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:42,694 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-26 19:13:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:13:42,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:13:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:42,696 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:13:42,696 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:13:42,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:13:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:13:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:13:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-26 19:13:42,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2020-10-26 19:13:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:42,704 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-26 19:13:42,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:13:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-26 19:13:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:13:42,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:42,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:42,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:42,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1932533098, now seen corresponding path program 4 times [2020-10-26 19:13:42,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:42,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124581762] [2020-10-26 19:13:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:42,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:13:42,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:42,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-26 19:13:42,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:13:42,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:43,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:43,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:43,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:43,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:43,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:43,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:43,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:43,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:43,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:43,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:43,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124581762] [2020-10-26 19:13:43,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:43,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660641698] [2020-10-26 19:13:43,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:43,055 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 8 states. [2020-10-26 19:13:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:43,152 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-26 19:13:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:13:43,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-26 19:13:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:43,154 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:13:43,154 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:13:43,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:13:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:13:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:13:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-26 19:13:43,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2020-10-26 19:13:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:43,162 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-26 19:13:43,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-26 19:13:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:13:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:43,163 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:43,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:43,164 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2068735112, now seen corresponding path program 5 times [2020-10-26 19:13:43,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:43,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334341451] [2020-10-26 19:13:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:43,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:13:43,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:43,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-26 19:13:43,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:13:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:13:43,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:43,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:43,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:43,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:43,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:43,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334341451] [2020-10-26 19:13:43,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:43,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:13:43,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507589568] [2020-10-26 19:13:43,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:13:43,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:13:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:43,594 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-10-26 19:13:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:43,701 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-26 19:13:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:13:43,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-26 19:13:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:43,703 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:13:43,703 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:13:43,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:13:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:13:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:13:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-26 19:13:43,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2020-10-26 19:13:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:43,710 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-26 19:13:43,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:13:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-26 19:13:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:13:43,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:43,711 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:43,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:13:43,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 185115610, now seen corresponding path program 6 times [2020-10-26 19:13:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:43,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682662553] [2020-10-26 19:13:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:13:44,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:13:44,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:44,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:44,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:44,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:44,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682662553] [2020-10-26 19:13:44,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:44,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:13:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737179053] [2020-10-26 19:13:44,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:13:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:13:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:44,161 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 10 states. [2020-10-26 19:13:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:44,283 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-26 19:13:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:13:44,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 19:13:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:44,285 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:13:44,285 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:13:44,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:13:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:13:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:13:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-26 19:13:44,299 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 30 [2020-10-26 19:13:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:44,303 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-26 19:13:44,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:13:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-26 19:13:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:13:44,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:44,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:44,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:13:44,305 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1472142268, now seen corresponding path program 7 times [2020-10-26 19:13:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:44,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426492160] [2020-10-26 19:13:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:13:44,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:44,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-26 19:13:44,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:13:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:13:44,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:44,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:44,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:44,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426492160] [2020-10-26 19:13:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:13:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527270436] [2020-10-26 19:13:44,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:13:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:13:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:13:44,980 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 11 states. [2020-10-26 19:13:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:45,105 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-26 19:13:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:13:45,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:13:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:45,106 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:13:45,107 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:13:45,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:13:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:13:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:13:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:13:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-26 19:13:45,113 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 32 [2020-10-26 19:13:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:45,114 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-26 19:13:45,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:13:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-26 19:13:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:13:45,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:45,115 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:45,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:13:45,115 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1354179358, now seen corresponding path program 8 times [2020-10-26 19:13:45,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:45,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8970069] [2020-10-26 19:13:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:13:45,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-26 19:13:45,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:13:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:13:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:45,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:45,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8970069] [2020-10-26 19:13:45,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:45,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:13:45,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299640236] [2020-10-26 19:13:45,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:13:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:13:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:13:45,834 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 12 states. [2020-10-26 19:13:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:45,987 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-26 19:13:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:13:45,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:13:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:45,989 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:13:45,989 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:13:45,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:13:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:13:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:13:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:13:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-26 19:13:45,995 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 34 [2020-10-26 19:13:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:45,995 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-26 19:13:45,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:13:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-26 19:13:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:13:45,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:45,997 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:45,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:13:45,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -339027456, now seen corresponding path program 9 times [2020-10-26 19:13:45,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:45,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800239199] [2020-10-26 19:13:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:13:46,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:46,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-26 19:13:46,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:13:46,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:46,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:13:46,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:47,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:47,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:47,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800239199] [2020-10-26 19:13:47,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:47,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:13:47,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269624564] [2020-10-26 19:13:47,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:13:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:13:47,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:13:47,039 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 13 states. [2020-10-26 19:13:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:47,175 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-26 19:13:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:13:47,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:13:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:47,177 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:13:47,177 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:13:47,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:13:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:13:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:13:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:13:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-26 19:13:47,192 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 36 [2020-10-26 19:13:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:47,192 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-26 19:13:47,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:13:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-26 19:13:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:13:47,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:47,194 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:47,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:13:47,197 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 281829474, now seen corresponding path program 10 times [2020-10-26 19:13:47,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:47,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444099766] [2020-10-26 19:13:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:48,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:13:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:48,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444099766] [2020-10-26 19:13:48,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:48,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:13:48,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340495282] [2020-10-26 19:13:48,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:13:48,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:13:48,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:48,270 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 14 states. [2020-10-26 19:13:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:48,420 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-26 19:13:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:13:48,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:13:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:48,422 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:13:48,422 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:13:48,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:13:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:13:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:13:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-26 19:13:48,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 38 [2020-10-26 19:13:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:48,439 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-26 19:13:48,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:13:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-26 19:13:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:13:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:48,442 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:48,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:13:48,443 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -75114940, now seen corresponding path program 11 times [2020-10-26 19:13:48,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:48,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019630570] [2020-10-26 19:13:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:13:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:49,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019630570] [2020-10-26 19:13:49,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:49,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:13:49,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829354522] [2020-10-26 19:13:49,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:13:49,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:13:49,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:13:49,892 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 15 states. [2020-10-26 19:13:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:50,049 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-26 19:13:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:13:50,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-26 19:13:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:50,051 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:13:50,051 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:13:50,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:13:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:13:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:13:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:13:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-26 19:13:50,058 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 40 [2020-10-26 19:13:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:50,058 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-26 19:13:50,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:13:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-26 19:13:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:13:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:50,059 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:50,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:13:50,059 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash 498686886, now seen corresponding path program 12 times [2020-10-26 19:13:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310252572] [2020-10-26 19:13:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:13:51,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:13:51,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:51,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:51,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:51,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:51,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:51,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:51,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310252572] [2020-10-26 19:13:51,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:51,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:13:51,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930175761] [2020-10-26 19:13:51,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:13:51,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:51,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:13:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:13:51,485 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 16 states. [2020-10-26 19:13:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:51,664 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-26 19:13:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:13:51,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-26 19:13:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:51,665 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:13:51,666 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:13:51,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:13:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:13:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:13:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:13:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-26 19:13:51,683 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 42 [2020-10-26 19:13:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:51,683 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-26 19:13:51,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:13:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-26 19:13:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:13:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:51,687 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:51,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:13:51,687 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2128539512, now seen corresponding path program 13 times [2020-10-26 19:13:51,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:51,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220866620] [2020-10-26 19:13:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:13:53,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:53,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-26 19:13:53,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:13:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:13:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:53,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:53,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:53,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:53,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220866620] [2020-10-26 19:13:53,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:53,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:13:53,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714269413] [2020-10-26 19:13:53,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:13:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:13:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:13:53,273 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 17 states. [2020-10-26 19:13:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:53,491 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-26 19:13:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:13:53,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 19:13:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:53,492 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:13:53,492 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:13:53,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:13:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:13:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:13:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:13:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-26 19:13:53,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 44 [2020-10-26 19:13:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:53,502 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-26 19:13:53,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:13:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-26 19:13:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:13:53,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:53,504 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:53,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:13:53,505 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1452337942, now seen corresponding path program 14 times [2020-10-26 19:13:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:53,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928854901] [2020-10-26 19:13:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:13:54,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:54,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-26 19:13:54,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:13:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:13:54,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:55,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:55,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:55,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:55,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:55,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:55,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928854901] [2020-10-26 19:13:55,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:55,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:13:55,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11871560] [2020-10-26 19:13:55,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:13:55,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:13:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:13:55,190 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 18 states. [2020-10-26 19:13:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:55,346 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-26 19:13:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:13:55,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-26 19:13:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:55,348 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:13:55,348 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:13:55,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:13:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:13:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:13:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:13:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-26 19:13:55,361 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 46 [2020-10-26 19:13:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:55,361 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-26 19:13:55,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:13:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-26 19:13:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:13:55,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,363 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:13:55,364 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -162690868, now seen corresponding path program 15 times [2020-10-26 19:13:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745097314] [2020-10-26 19:13:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:13:56,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1603 [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:13:56,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745097314] [2020-10-26 19:13:57,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:57,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:13:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916160461] [2020-10-26 19:13:57,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:13:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:13:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:13:57,279 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 19 states. [2020-10-26 19:13:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:57,415 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-26 19:13:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:13:57,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:13:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:57,416 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:13:57,416 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:13:57,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:13:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:13:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:13:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:13:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-26 19:13:57,422 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 48 [2020-10-26 19:13:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:57,422 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-26 19:13:57,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:13:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-26 19:13:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:13:57,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,423 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:13:57,424 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2057401298, now seen corresponding path program 16 times [2020-10-26 19:13:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613013169] [2020-10-26 19:13:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1722 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:13:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:13:59,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613013169] [2020-10-26 19:13:59,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:13:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297710876] [2020-10-26 19:13:59,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:13:59,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:13:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:13:59,467 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 20 states. [2020-10-26 19:13:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,635 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-26 19:13:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:13:59,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:13:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,637 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:13:59,637 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:13:59,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:13:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:13:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:13:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:13:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-26 19:13:59,643 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 50 [2020-10-26 19:13:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,645 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-26 19:13:59,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:13:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-26 19:13:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:13:59,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,646 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:13:59,646 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1807991024, now seen corresponding path program 17 times [2020-10-26 19:13:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422760548] [2020-10-26 19:13:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:14:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:01,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:01,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:01,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422760548] [2020-10-26 19:14:01,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:01,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:14:01,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920576596] [2020-10-26 19:14:01,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:14:01,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:01,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:14:01,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:01,695 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 21 states. [2020-10-26 19:14:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:01,917 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-26 19:14:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:14:01,917 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-26 19:14:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:01,918 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:14:01,918 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:14:01,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:14:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:14:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:14:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-26 19:14:01,929 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 52 [2020-10-26 19:14:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-26 19:14:01,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:14:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-26 19:14:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:14:01,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:01,930 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:01,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:14:01,931 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1652081010, now seen corresponding path program 18 times [2020-10-26 19:14:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130848963] [2020-10-26 19:14:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:14:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:04,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:04,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:04,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:04,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:04,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:04,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:04,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:04,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130848963] [2020-10-26 19:14:04,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:04,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:14:04,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621405373] [2020-10-26 19:14:04,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:14:04,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:14:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:04,029 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 22 states. [2020-10-26 19:14:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:04,241 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-26 19:14:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:14:04,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 19:14:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:04,243 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:14:04,243 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:14:04,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:14:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:14:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:14:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-26 19:14:04,254 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 54 [2020-10-26 19:14:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:04,254 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-26 19:14:04,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:14:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-26 19:14:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:14:04,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:04,255 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:04,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:14:04,256 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1818348716, now seen corresponding path program 19 times [2020-10-26 19:14:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:04,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060356848] [2020-10-26 19:14:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:14:06,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:14:06,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:06,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:06,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:06,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:06,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060356848] [2020-10-26 19:14:06,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:06,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:14:06,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000819477] [2020-10-26 19:14:06,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:14:06,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:14:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:06,778 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 23 states. [2020-10-26 19:14:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,077 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-26 19:14:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:14:07,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:14:07,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,079 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:14:07,079 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:14:07,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:14:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:14:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:14:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-26 19:14:07,089 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 56 [2020-10-26 19:14:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,090 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-26 19:14:07,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:14:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-26 19:14:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:14:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,094 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:14:07,096 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 288273590, now seen corresponding path program 20 times [2020-10-26 19:14:07,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169350010] [2020-10-26 19:14:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:14:09,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-26 19:14:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:14:09,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:09,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:09,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169350010] [2020-10-26 19:14:09,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:09,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:09,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391377301] [2020-10-26 19:14:09,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:09,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:09,510 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 24 states. [2020-10-26 19:14:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:09,756 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-26 19:14:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:14:09,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-26 19:14:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:09,760 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:14:09,760 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:14:09,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:14:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:14:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:14:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-26 19:14:09,767 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 58 [2020-10-26 19:14:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:09,767 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-26 19:14:09,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-26 19:14:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:14:09,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:09,768 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:09,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:14:09,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1822713240, now seen corresponding path program 21 times [2020-10-26 19:14:09,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:09,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549311929] [2020-10-26 19:14:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:14:12,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2311 [2020-10-26 19:14:12,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:14:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:14:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:12,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:12,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549311929] [2020-10-26 19:14:12,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:12,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:14:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576012947] [2020-10-26 19:14:12,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:14:12,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:14:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:12,597 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 25 states. [2020-10-26 19:14:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:12,831 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-26 19:14:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:14:12,832 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-26 19:14:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:12,833 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:14:12,833 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:14:12,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:14:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:14:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:14:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-26 19:14:12,840 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 60 [2020-10-26 19:14:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:12,841 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-26 19:14:12,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:14:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-26 19:14:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:14:12,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:12,842 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:12,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:14:12,842 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1049532934, now seen corresponding path program 22 times [2020-10-26 19:14:12,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:12,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008907093] [2020-10-26 19:14:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:14:14,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:14,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-26 19:14:14,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:14:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:14:14,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:15,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:15,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:15,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:15,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:15,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008907093] [2020-10-26 19:14:15,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:15,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:14:15,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883608202] [2020-10-26 19:14:15,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:14:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:14:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:15,284 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 26 states. [2020-10-26 19:14:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:15,520 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-26 19:14:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:14:15,521 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-26 19:14:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:15,522 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:14:15,522 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:14:15,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:14:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:14:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:14:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-26 19:14:15,526 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 62 [2020-10-26 19:14:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:15,527 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-26 19:14:15,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:14:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-26 19:14:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:14:15,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:15,528 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:15,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:14:15,530 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 385865180, now seen corresponding path program 23 times [2020-10-26 19:14:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:15,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354602285] [2020-10-26 19:14:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:15,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:14:17,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:17,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:17,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:17,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:17,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:17,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:17,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354602285] [2020-10-26 19:14:17,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:14:17,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728107016] [2020-10-26 19:14:17,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:14:17,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:14:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:17,787 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 27 states. [2020-10-26 19:14:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:18,085 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-26 19:14:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:14:18,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:14:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:18,086 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:14:18,086 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:14:18,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:14:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:14:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:14:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-26 19:14:18,092 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 64 [2020-10-26 19:14:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:18,093 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-26 19:14:18,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:14:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-26 19:14:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:14:18,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:18,095 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:18,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:14:18,096 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1118950718, now seen corresponding path program 24 times [2020-10-26 19:14:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:18,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001241504] [2020-10-26 19:14:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:19,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:19,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:14:19,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1779 [2020-10-26 19:14:19,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:14:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:14:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:20,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:20,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:20,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:20,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:20,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:20,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:20,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:20,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001241504] [2020-10-26 19:14:20,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:20,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:14:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241431669] [2020-10-26 19:14:20,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:14:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:14:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:14:20,446 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 28 states. [2020-10-26 19:14:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:20,641 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-26 19:14:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:14:20,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-26 19:14:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:20,643 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:14:20,643 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:14:20,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:14:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:14:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:14:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:14:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-26 19:14:20,654 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 66 [2020-10-26 19:14:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:20,655 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-26 19:14:20,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:14:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-26 19:14:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:14:20,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:20,656 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:20,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:14:20,656 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1239516192, now seen corresponding path program 25 times [2020-10-26 19:14:20,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:20,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984396877] [2020-10-26 19:14:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:22,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2133 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:14:22,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:23,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:23,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984396877] [2020-10-26 19:14:23,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:23,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:14:23,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462980779] [2020-10-26 19:14:23,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:14:23,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:14:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:14:23,429 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 29 states. [2020-10-26 19:14:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:23,725 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-26 19:14:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:14:23,726 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-26 19:14:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:23,727 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:14:23,727 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:14:23,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:14:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:14:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:14:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:14:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-26 19:14:23,739 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 68 [2020-10-26 19:14:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:23,739 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-26 19:14:23,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:14:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-26 19:14:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:14:23,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:23,740 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:23,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:14:23,740 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1138819714, now seen corresponding path program 26 times [2020-10-26 19:14:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482827851] [2020-10-26 19:14:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:14:25,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:26,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:26,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:26,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482827851] [2020-10-26 19:14:26,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:26,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:14:26,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270484176] [2020-10-26 19:14:26,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:14:26,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:26,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:14:26,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:14:26,554 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 30 states. [2020-10-26 19:14:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:26,795 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-26 19:14:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:14:26,795 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:14:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:26,796 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:14:26,797 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:14:26,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:14:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:14:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:14:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:14:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-26 19:14:26,803 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 70 [2020-10-26 19:14:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:26,803 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-26 19:14:26,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:14:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-26 19:14:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:14:26,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:26,804 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:26,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:14:26,805 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1141215132, now seen corresponding path program 27 times [2020-10-26 19:14:26,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:26,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437187881] [2020-10-26 19:14:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2386 [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:14:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:14:29,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:29,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:29,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:29,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437187881] [2020-10-26 19:14:29,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:29,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:14:29,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903921985] [2020-10-26 19:14:29,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:14:29,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:14:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:14:29,899 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 31 states. [2020-10-26 19:14:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:30,231 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-26 19:14:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:14:30,231 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-26 19:14:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:30,232 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:14:30,232 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:14:30,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:14:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:14:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:14:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:14:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-26 19:14:30,239 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 72 [2020-10-26 19:14:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:30,239 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-26 19:14:30,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:14:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-26 19:14:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:14:30,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:30,240 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:30,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:14:30,240 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1821381178, now seen corresponding path program 28 times [2020-10-26 19:14:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:30,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735065695] [2020-10-26 19:14:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:32,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:32,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:14:32,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2701 [2020-10-26 19:14:32,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:14:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:14:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:33,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:33,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735065695] [2020-10-26 19:14:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:33,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:14:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072585869] [2020-10-26 19:14:33,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:14:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:14:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:14:33,690 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 32 states. [2020-10-26 19:14:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:34,030 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-10-26 19:14:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:14:34,030 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-26 19:14:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:34,031 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:14:34,032 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:14:34,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:14:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:14:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:14:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:14:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-26 19:14:34,038 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 74 [2020-10-26 19:14:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:34,038 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-26 19:14:34,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:14:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-26 19:14:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:14:34,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:34,039 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:34,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:14:34,040 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:34,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1669044904, now seen corresponding path program 29 times [2020-10-26 19:14:34,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:34,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786951578] [2020-10-26 19:14:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:34,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:14:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:37,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:37,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786951578] [2020-10-26 19:14:37,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:37,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:14:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107758610] [2020-10-26 19:14:37,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:14:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:14:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:14:37,577 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 33 states. [2020-10-26 19:14:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:37,930 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-26 19:14:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:14:37,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-26 19:14:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:37,932 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:14:37,932 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:14:37,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:14:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:14:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:14:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:14:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-26 19:14:37,938 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 76 [2020-10-26 19:14:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:37,939 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-26 19:14:37,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:14:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-26 19:14:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:14:37,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:37,947 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:37,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:14:37,947 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1599051530, now seen corresponding path program 30 times [2020-10-26 19:14:37,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:37,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384477654] [2020-10-26 19:14:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:14:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:41,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384477654] [2020-10-26 19:14:41,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:41,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:14:41,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793123463] [2020-10-26 19:14:41,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:14:41,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:14:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:14:41,888 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 34 states. [2020-10-26 19:14:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:42,242 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-10-26 19:14:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:14:42,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-26 19:14:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:42,245 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:14:42,245 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:14:42,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:14:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:14:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:14:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:14:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-26 19:14:42,251 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 78 [2020-10-26 19:14:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:42,252 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-26 19:14:42,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:14:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-26 19:14:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:14:42,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:42,253 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:42,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:14:42,253 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1240071444, now seen corresponding path program 31 times [2020-10-26 19:14:42,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:42,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925908821] [2020-10-26 19:14:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:42,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:42,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3199 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:14:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:46,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:46,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:46,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925908821] [2020-10-26 19:14:46,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:46,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:14:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131806128] [2020-10-26 19:14:46,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:14:46,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:14:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:14:46,242 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 35 states. [2020-10-26 19:14:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:46,499 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2020-10-26 19:14:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:14:46,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-26 19:14:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:46,501 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:14:46,501 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:14:46,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:14:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:14:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:14:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:14:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-26 19:14:46,513 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 80 [2020-10-26 19:14:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:46,513 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-26 19:14:46,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:14:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-26 19:14:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:14:46,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:46,515 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:46,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:14:46,515 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1961950798, now seen corresponding path program 32 times [2020-10-26 19:14:46,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:46,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654635612] [2020-10-26 19:14:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:49,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:14:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:50,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:50,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:50,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654635612] [2020-10-26 19:14:50,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:50,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:14:50,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111292291] [2020-10-26 19:14:50,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:14:50,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:50,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:14:50,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:14:50,814 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 36 states. [2020-10-26 19:14:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:51,194 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-10-26 19:14:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:14:51,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-26 19:14:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:51,197 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:14:51,197 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:14:51,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:14:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:14:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:14:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:14:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-26 19:14:51,203 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 82 [2020-10-26 19:14:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:51,204 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-26 19:14:51,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:14:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-26 19:14:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:14:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:51,205 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:51,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:14:51,205 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash -386225872, now seen corresponding path program 33 times [2020-10-26 19:14:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:51,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193564632] [2020-10-26 19:14:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3816 [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:14:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:14:55,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:55,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:55,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193564632] [2020-10-26 19:14:55,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:55,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:14:55,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546954962] [2020-10-26 19:14:55,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:14:55,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:14:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:14:55,960 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 37 states. [2020-10-26 19:14:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:56,360 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-26 19:14:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:14:56,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-26 19:14:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:56,362 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:14:56,362 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:14:56,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:14:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:14:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:14:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:14:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2020-10-26 19:14:56,369 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 84 [2020-10-26 19:14:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:56,370 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2020-10-26 19:14:56,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:14:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2020-10-26 19:14:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:14:56,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:56,371 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:56,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:14:56,371 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2126175342, now seen corresponding path program 34 times [2020-10-26 19:14:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:56,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45947487] [2020-10-26 19:14:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:56,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:00,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3928 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:15:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45947487] [2020-10-26 19:15:01,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:01,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:15:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356436284] [2020-10-26 19:15:01,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:15:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:15:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:15:01,327 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand 38 states. [2020-10-26 19:15:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:01,692 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-10-26 19:15:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:15:01,693 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:15:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:01,695 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:15:01,695 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:15:01,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:15:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:15:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:15:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:15:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-10-26 19:15:01,701 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 86 [2020-10-26 19:15:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:01,702 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-10-26 19:15:01,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:15:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-10-26 19:15:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:15:01,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:01,703 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:01,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:15:01,703 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash 819629428, now seen corresponding path program 35 times [2020-10-26 19:15:01,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:01,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708441639] [2020-10-26 19:15:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:05,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4154 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:15:05,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:06,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:06,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:06,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:06,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:06,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:06,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:06,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:07,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708441639] [2020-10-26 19:15:07,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:07,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:15:07,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505122038] [2020-10-26 19:15:07,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:15:07,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:15:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:15:07,004 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 39 states. [2020-10-26 19:15:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:07,235 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-26 19:15:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:15:07,236 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2020-10-26 19:15:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:07,237 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:15:07,237 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:15:07,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:15:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:15:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:15:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:15:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-26 19:15:07,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 88 [2020-10-26 19:15:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:07,245 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-26 19:15:07,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:15:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-26 19:15:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:15:07,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:07,246 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:07,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:15:07,246 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1354565334, now seen corresponding path program 36 times [2020-10-26 19:15:07,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:07,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985674809] [2020-10-26 19:15:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:11,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4638 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:15:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:12,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:12,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985674809] [2020-10-26 19:15:12,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:13,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:15:13,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366132701] [2020-10-26 19:15:13,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:15:13,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:15:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:15:13,002 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 40 states. [2020-10-26 19:15:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:13,438 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2020-10-26 19:15:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:15:13,439 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-10-26 19:15:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:13,440 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:15:13,440 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:15:13,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:15:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:15:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:15:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:15:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-26 19:15:13,446 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 90 [2020-10-26 19:15:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:13,447 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-26 19:15:13,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:15:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-26 19:15:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:15:13,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:13,448 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:13,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:15:13,448 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 31895480, now seen corresponding path program 37 times [2020-10-26 19:15:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:13,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126855364] [2020-10-26 19:15:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4880 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:15:18,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:19,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:19,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126855364] [2020-10-26 19:15:19,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:19,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:15:19,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489214801] [2020-10-26 19:15:19,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:15:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:19,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:15:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:15:19,537 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 41 states. [2020-10-26 19:15:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:19,973 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-26 19:15:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:15:19,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2020-10-26 19:15:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:19,975 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:15:19,975 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:15:19,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:15:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:15:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:15:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:15:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-26 19:15:19,981 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 92 [2020-10-26 19:15:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:19,981 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-26 19:15:19,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:15:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-26 19:15:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:15:19,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:19,982 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:19,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:15:19,983 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:19,983 INFO L82 PathProgramCache]: Analyzing trace with hash 256485402, now seen corresponding path program 38 times [2020-10-26 19:15:19,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:19,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817499057] [2020-10-26 19:15:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:25,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:15:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:26,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:26,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:26,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:26,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:26,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:26,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817499057] [2020-10-26 19:15:26,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:26,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:15:26,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945484090] [2020-10-26 19:15:26,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:15:26,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:26,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:15:26,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:15:26,279 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 42 states. [2020-10-26 19:15:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:26,729 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-10-26 19:15:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:15:26,729 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2020-10-26 19:15:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:26,731 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:15:26,731 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:15:26,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:15:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:15:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:15:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:15:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2020-10-26 19:15:26,736 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 94 [2020-10-26 19:15:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:26,736 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2020-10-26 19:15:26,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:15:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2020-10-26 19:15:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:15:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:26,737 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:26,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:15:26,738 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1339035644, now seen corresponding path program 39 times [2020-10-26 19:15:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181791489] [2020-10-26 19:15:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:26,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:31,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:15:31,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:15:31,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:15:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:15:31,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181791489] [2020-10-26 19:15:33,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:33,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:15:33,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629868449] [2020-10-26 19:15:33,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:15:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:15:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:15:33,078 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 43 states. [2020-10-26 19:15:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:33,542 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-10-26 19:15:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:15:33,543 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2020-10-26 19:15:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:33,544 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:15:33,544 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:15:33,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:15:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:15:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:15:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:15:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-10-26 19:15:33,551 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 96 [2020-10-26 19:15:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:33,551 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-10-26 19:15:33,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:15:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-10-26 19:15:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:15:33,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:33,552 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:33,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:15:33,552 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2007234722, now seen corresponding path program 40 times [2020-10-26 19:15:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:33,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29957020] [2020-10-26 19:15:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:15:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:39,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:39,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:39,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29957020] [2020-10-26 19:15:39,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:39,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:15:39,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886635846] [2020-10-26 19:15:39,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:15:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:39,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:15:39,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:15:39,962 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 44 states. [2020-10-26 19:15:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:40,423 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-26 19:15:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:15:40,424 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-10-26 19:15:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:40,426 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:15:40,426 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:15:40,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:15:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:15:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:15:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:15:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2020-10-26 19:15:40,431 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 98 [2020-10-26 19:15:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:40,432 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2020-10-26 19:15:40,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:15:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2020-10-26 19:15:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:15:40,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:40,433 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:40,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:15:40,433 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash -842551744, now seen corresponding path program 41 times [2020-10-26 19:15:40,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:40,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18373955] [2020-10-26 19:15:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:40,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:45,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:45,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:15:45,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:45,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:15:45,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:15:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:15:45,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:46,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18373955] [2020-10-26 19:15:46,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:46,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:15:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655071119] [2020-10-26 19:15:46,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:15:46,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:46,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:15:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:15:46,926 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 45 states. [2020-10-26 19:15:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:47,239 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-26 19:15:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:15:47,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2020-10-26 19:15:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:47,241 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:15:47,241 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:15:47,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:15:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:15:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:15:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:15:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2020-10-26 19:15:47,249 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 100 [2020-10-26 19:15:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:47,252 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2020-10-26 19:15:47,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:15:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2020-10-26 19:15:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:15:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:47,253 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:47,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:15:47,253 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1726293154, now seen corresponding path program 42 times [2020-10-26 19:15:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:47,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212648453] [2020-10-26 19:15:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:15:52,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:15:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:15:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:15:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:53,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:53,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:53,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212648453] [2020-10-26 19:15:53,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:53,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:15:53,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485786126] [2020-10-26 19:15:53,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:15:53,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:15:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:15:53,790 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand 46 states. [2020-10-26 19:15:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:54,269 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-26 19:15:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:15:54,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2020-10-26 19:15:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:54,272 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:15:54,272 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:15:54,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:15:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:15:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:15:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:15:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-26 19:15:54,278 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 102 [2020-10-26 19:15:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:54,278 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-26 19:15:54,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:15:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-26 19:15:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:15:54,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:54,279 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:54,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:15:54,279 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash 780044932, now seen corresponding path program 43 times [2020-10-26 19:15:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:54,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854336026] [2020-10-26 19:15:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:15:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:00,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:00,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:00,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:00,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:00,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854336026] [2020-10-26 19:16:00,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:00,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:16:00,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046141944] [2020-10-26 19:16:00,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:16:00,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:16:00,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:16:00,906 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 47 states. [2020-10-26 19:16:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:01,196 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-26 19:16:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:16:01,197 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2020-10-26 19:16:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:01,201 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:16:01,201 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:16:01,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:16:01,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:16:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:16:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:16:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2020-10-26 19:16:01,207 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 104 [2020-10-26 19:16:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:01,208 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2020-10-26 19:16:01,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:16:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2020-10-26 19:16:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:16:01,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:01,209 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:01,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:16:01,210 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1968570342, now seen corresponding path program 44 times [2020-10-26 19:16:01,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:01,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227029399] [2020-10-26 19:16:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:01,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227029399] [2020-10-26 19:16:07,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:07,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:16:07,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445631505] [2020-10-26 19:16:07,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:16:07,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:07,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:16:07,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:16:07,839 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand 48 states. [2020-10-26 19:16:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:08,354 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-26 19:16:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:16:08,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2020-10-26 19:16:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:08,355 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:16:08,356 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:16:08,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:16:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:16:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:16:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:16:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2020-10-26 19:16:08,362 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 106 [2020-10-26 19:16:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:08,362 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2020-10-26 19:16:08,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:16:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2020-10-26 19:16:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:16:08,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:08,364 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:08,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:16:08,364 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1680188616, now seen corresponding path program 45 times [2020-10-26 19:16:08,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:08,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018760154] [2020-10-26 19:16:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:13,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:16:13,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:16:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:15,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018760154] [2020-10-26 19:16:15,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:15,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:16:15,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733881660] [2020-10-26 19:16:15,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:16:15,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:16:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:16:15,084 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 49 states. [2020-10-26 19:16:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:15,519 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-26 19:16:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:16:15,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2020-10-26 19:16:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:15,522 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:16:15,522 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:16:15,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:16:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:16:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:16:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:16:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2020-10-26 19:16:15,528 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 108 [2020-10-26 19:16:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:15,528 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2020-10-26 19:16:15,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:16:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2020-10-26 19:16:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:16:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:15,529 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:16:15,530 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash -576743126, now seen corresponding path program 46 times [2020-10-26 19:16:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:15,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425973469] [2020-10-26 19:16:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:20,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:20,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:16:20,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:22,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:22,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:22,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:22,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425973469] [2020-10-26 19:16:22,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:22,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:16:22,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351745990] [2020-10-26 19:16:22,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:16:22,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:16:22,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:16:22,333 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand 50 states. [2020-10-26 19:16:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:22,722 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2020-10-26 19:16:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:16:22,723 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2020-10-26 19:16:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:22,724 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:16:22,724 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:16:22,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:16:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:16:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:16:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:16:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-26 19:16:22,730 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 110 [2020-10-26 19:16:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:22,730 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-26 19:16:22,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:16:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-26 19:16:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:16:22,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:22,731 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:22,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:16:22,732 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash -529662708, now seen corresponding path program 47 times [2020-10-26 19:16:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:22,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741257416] [2020-10-26 19:16:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:27,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:27,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:16:27,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:29,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:29,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:29,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:29,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:29,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:29,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:29,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741257416] [2020-10-26 19:16:29,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:29,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:16:29,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311370511] [2020-10-26 19:16:29,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:16:29,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:16:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:16:29,637 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 51 states. [2020-10-26 19:16:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:30,180 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2020-10-26 19:16:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:16:30,181 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2020-10-26 19:16:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:30,182 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:16:30,183 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:16:30,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:16:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:16:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:16:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:16:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-26 19:16:30,189 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 112 [2020-10-26 19:16:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:30,190 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-26 19:16:30,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:16:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-26 19:16:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:16:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:30,191 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:30,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:16:30,191 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1764946030, now seen corresponding path program 48 times [2020-10-26 19:16:30,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:30,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683262448] [2020-10-26 19:16:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:30,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:16:35,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:35,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:16:35,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:37,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:37,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683262448] [2020-10-26 19:16:37,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:37,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:16:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228900844] [2020-10-26 19:16:37,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:16:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:16:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:16:37,159 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 52 states. [2020-10-26 19:16:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:37,531 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2020-10-26 19:16:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:16:37,531 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2020-10-26 19:16:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:37,533 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:16:37,533 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:16:37,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:16:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:16:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-26 19:16:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:16:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2020-10-26 19:16:37,543 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 114 [2020-10-26 19:16:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:37,544 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2020-10-26 19:16:37,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:16:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2020-10-26 19:16:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:16:37,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:37,545 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:37,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:16:37,545 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash -729246896, now seen corresponding path program 49 times [2020-10-26 19:16:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:37,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776837310] [2020-10-26 19:16:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:16:42,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:42,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:42,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:16:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:16:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:44,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:44,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:44,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:44,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776837310] [2020-10-26 19:16:44,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:44,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:16:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060252014] [2020-10-26 19:16:44,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:16:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:16:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:16:44,601 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 53 states. [2020-10-26 19:16:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:45,134 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-26 19:16:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:16:45,135 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2020-10-26 19:16:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:45,137 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:16:45,137 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:16:45,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:16:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:16:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-26 19:16:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:16:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-10-26 19:16:45,143 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 116 [2020-10-26 19:16:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:45,144 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-10-26 19:16:45,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:16:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-10-26 19:16:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:16:45,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:45,145 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:45,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:16:45,145 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1056897614, now seen corresponding path program 50 times [2020-10-26 19:16:45,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:45,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959482252] [2020-10-26 19:16:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:16:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:16:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:52,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:52,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:52,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:52,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959482252] [2020-10-26 19:16:52,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:52,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:16:52,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734410538] [2020-10-26 19:16:52,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:16:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:16:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:16:52,210 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 54 states. [2020-10-26 19:16:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:52,780 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2020-10-26 19:16:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:16:52,781 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2020-10-26 19:16:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:52,782 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:16:52,782 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:16:52,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:16:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:16:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-26 19:16:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:16:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2020-10-26 19:16:52,788 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 118 [2020-10-26 19:16:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:52,789 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2020-10-26 19:16:52,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:16:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2020-10-26 19:16:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:16:52,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:52,790 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:52,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:16:52,790 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1898342292, now seen corresponding path program 51 times [2020-10-26 19:16:52,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:52,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057519414] [2020-10-26 19:16:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:16:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:16:57,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:59,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:59,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:59,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:59,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057519414] [2020-10-26 19:16:59,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:59,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:16:59,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041654879] [2020-10-26 19:16:59,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:16:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:16:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:16:59,910 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 55 states. [2020-10-26 19:17:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:00,246 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-10-26 19:17:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:17:00,247 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2020-10-26 19:17:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:00,248 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:17:00,249 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:17:00,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:17:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:17:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-26 19:17:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:17:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-26 19:17:00,254 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 120 [2020-10-26 19:17:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-26 19:17:00,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:17:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-26 19:17:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:17:00,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:00,256 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:00,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:17:00,256 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1384457994, now seen corresponding path program 52 times [2020-10-26 19:17:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:00,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727126740] [2020-10-26 19:17:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:17:05,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:07,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:07,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:07,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:07,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727126740] [2020-10-26 19:17:07,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:07,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-26 19:17:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946739428] [2020-10-26 19:17:07,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-26 19:17:07,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-26 19:17:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:17:07,430 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 56 states. [2020-10-26 19:17:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:08,005 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2020-10-26 19:17:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:17:08,005 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2020-10-26 19:17:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:08,007 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:17:08,007 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:17:08,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:17:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:17:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-26 19:17:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-26 19:17:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-26 19:17:08,014 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 122 [2020-10-26 19:17:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:08,014 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-26 19:17:08,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-26 19:17:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-26 19:17:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:17:08,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:08,015 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:08,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-26 19:17:08,016 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash 645429720, now seen corresponding path program 53 times [2020-10-26 19:17:08,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:08,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860605869] [2020-10-26 19:17:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:13,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 19:17:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:15,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:15,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:15,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:15,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:15,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:15,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860605869] [2020-10-26 19:17:15,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:15,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:17:15,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463383527] [2020-10-26 19:17:15,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:17:15,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:17:15,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:17:15,268 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 57 states. [2020-10-26 19:17:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:15,865 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2020-10-26 19:17:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:17:15,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2020-10-26 19:17:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:15,869 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:17:15,869 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:17:15,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:17:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:17:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-26 19:17:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-26 19:17:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-10-26 19:17:15,875 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 124 [2020-10-26 19:17:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:15,876 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-10-26 19:17:15,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:17:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-10-26 19:17:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:17:15,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:15,877 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-26 19:17:15,877 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1452370490, now seen corresponding path program 54 times [2020-10-26 19:17:15,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:15,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81346947] [2020-10-26 19:17:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:15,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:20,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 19:17:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:23,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81346947] [2020-10-26 19:17:23,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:23,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:17:23,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800607449] [2020-10-26 19:17:23,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:17:23,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:17:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:17:23,296 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand 58 states. [2020-10-26 19:17:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:23,934 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2020-10-26 19:17:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-26 19:17:23,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2020-10-26 19:17:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:23,936 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:17:23,936 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:17:23,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:17:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:17:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-26 19:17:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:17:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2020-10-26 19:17:23,942 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 126 [2020-10-26 19:17:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:23,942 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2020-10-26 19:17:23,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:17:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2020-10-26 19:17:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:17:23,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:23,944 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:23,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-26 19:17:23,944 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash -466630116, now seen corresponding path program 55 times [2020-10-26 19:17:23,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:23,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650093941] [2020-10-26 19:17:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-26 19:17:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 19:17:29,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:31,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:31,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:31,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650093941] [2020-10-26 19:17:31,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:31,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:17:31,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825161759] [2020-10-26 19:17:31,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:17:31,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:31,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:17:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:17:31,442 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 59 states. [2020-10-26 19:17:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:32,071 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-26 19:17:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:17:32,072 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2020-10-26 19:17:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:32,074 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:17:32,074 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:17:32,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:17:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:17:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-26 19:17:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-26 19:17:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-26 19:17:32,081 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 128 [2020-10-26 19:17:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:32,081 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-26 19:17:32,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:17:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-26 19:17:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:17:32,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:32,082 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:32,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-26 19:17:32,083 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2085242498, now seen corresponding path program 56 times [2020-10-26 19:17:32,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:32,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979616456] [2020-10-26 19:17:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking...