/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/standard_init7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:26,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:26,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:26,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:26,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:26,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:26,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:26,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:26,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:26,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:26,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:26,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:26,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:26,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:26,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:26,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:26,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:26,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:26,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:26,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:26,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:26,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:26,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:26,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:26,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:26,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:26,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:26,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:26,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:26,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:26,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:26,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:26,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:26,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:26,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:26,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:26,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:26,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:26,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:26,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:26,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:26,342 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 19:25:26,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:26,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:26,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:26,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:26,405 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:26,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:26,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:26,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:26,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:26,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:26,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:26,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:26,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:26,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:26,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:26,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:26,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:26,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:26,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:26,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:26,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:26,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:26,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:26,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:26,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:26,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:26,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:26,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:26,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:26,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:26,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:26,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:26,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:26,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:26,920 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:26,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-26 19:25:27,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c89ee4fdb/5df8f5db2d08462a80f5775873ed5a84/FLAGa07c013e3 [2020-10-26 19:25:27,680 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:27,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-26 19:25:27,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c89ee4fdb/5df8f5db2d08462a80f5775873ed5a84/FLAGa07c013e3 [2020-10-26 19:25:28,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c89ee4fdb/5df8f5db2d08462a80f5775873ed5a84 [2020-10-26 19:25:28,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:28,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:28,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:28,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:28,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:28,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@823163c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28, skipping insertion in model container [2020-10-26 19:25:28,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:28,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:28,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:28,307 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:28,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:28,348 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:28,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28 WrapperNode [2020-10-26 19:25:28,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:28,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:28,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:28,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:28,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (1/1) ... [2020-10-26 19:25:28,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:28,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:28,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:28,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:28,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (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 19:25:28,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:28,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:28,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:28,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:28,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:28,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:28,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:28,864 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:28,864 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 19:25:28,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:28 BoogieIcfgContainer [2020-10-26 19:25:28,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:28,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:28,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:28,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:28,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:28" (1/3) ... [2020-10-26 19:25:28,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9b6870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:28, skipping insertion in model container [2020-10-26 19:25:28,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:28" (2/3) ... [2020-10-26 19:25:28,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9b6870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:28, skipping insertion in model container [2020-10-26 19:25:28,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:28" (3/3) ... [2020-10-26 19:25:28,877 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2020-10-26 19:25:28,892 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:28,899 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:28,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:28,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:28,959 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:28,959 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:28,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:28,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:28,960 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:28,960 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:28,960 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-26 19:25:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:25:29,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:29,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:29,029 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1254713614, now seen corresponding path program 1 times [2020-10-26 19:25:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:29,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281253460] [2020-10-26 19:25:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:29,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:25:30,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:30,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-10-26 19:25:30,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:30,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:30,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:30,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:31,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:31,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:31,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:31,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:31,018 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 19:25:31,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281253460] [2020-10-26 19:25:31,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:31,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:31,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118790348] [2020-10-26 19:25:31,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:31,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:31,048 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-26 19:25:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:31,231 INFO L93 Difference]: Finished difference Result 77 states and 125 transitions. [2020-10-26 19:25:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:31,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 19:25:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:31,243 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:31,244 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:25:31,247 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 19:25:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:25:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 19:25:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:25:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-26 19:25:31,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-26 19:25:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:31,303 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-26 19:25:31,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-26 19:25:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:25:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:31,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:31,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:31,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2123827569, now seen corresponding path program 1 times [2020-10-26 19:25:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:31,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141830925] [2020-10-26 19:25:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:36,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:25:36,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:25:36,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:36,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:36,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:36,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:36,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:36,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:36,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:25:36,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141830925] [2020-10-26 19:25:36,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:36,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101892282] [2020-10-26 19:25:36,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:36,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:36,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:36,399 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-26 19:25:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:36,547 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-26 19:25:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:36,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:25:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:36,549 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:36,549 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:25:36,551 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 19:25:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:25:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:25:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:25:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:25:36,562 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-26 19:25:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:36,562 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:25:36,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:25:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:25:36,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:36,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:36,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:36,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1509369946, now seen corresponding path program 2 times [2020-10-26 19:25:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543938805] [2020-10-26 19:25:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:41,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:25:41,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:41,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:25:41,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:41,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:41,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:41,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:41,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:41,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:41,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:41,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:25:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543938805] [2020-10-26 19:25:41,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:41,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10965370] [2020-10-26 19:25:41,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:41,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:41,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:41,717 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-10-26 19:25:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:41,944 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-26 19:25:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:41,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-26 19:25:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:41,946 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:25:41,946 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:25:41,949 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 19:25:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:25:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 19:25:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:25:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-26 19:25:41,976 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 41 [2020-10-26 19:25:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:41,978 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-26 19:25:41,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-26 19:25:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:25:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:41,983 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:41,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:41,983 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2004918481, now seen corresponding path program 3 times [2020-10-26 19:25:41,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:41,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014971228] [2020-10-26 19:25:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:47,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:25:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:25:47,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:47,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:47,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:47,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:47,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:47,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:25:47,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014971228] [2020-10-26 19:25:47,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:47,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165387493] [2020-10-26 19:25:47,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:47,129 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-26 19:25:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:47,335 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-26 19:25:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:47,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-26 19:25:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:47,336 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:25:47,337 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:25:47,338 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 19:25:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:25:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-26 19:25:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:25:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-26 19:25:47,357 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 48 [2020-10-26 19:25:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:47,357 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-26 19:25:47,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:47,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-26 19:25:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:25:47,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:47,360 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:47,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:47,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1774816954, now seen corresponding path program 4 times [2020-10-26 19:25:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:47,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086983210] [2020-10-26 19:25:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:47,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:52,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:25:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:52,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:52,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:52,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:52,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:52,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:52,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:52,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:52,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:52,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:52,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:52,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:52,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:52,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:25:52,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086983210] [2020-10-26 19:25:52,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:52,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244380644] [2020-10-26 19:25:52,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:52,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:52,531 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-26 19:25:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:52,725 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-26 19:25:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:52,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-26 19:25:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:52,726 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:25:52,726 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:25:52,729 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 19:25:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:25:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 19:25:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:25:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-26 19:25:52,744 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 55 [2020-10-26 19:25:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:52,745 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-26 19:25:52,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-26 19:25:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:25:52,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:52,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:52,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:52,751 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1332096975, now seen corresponding path program 5 times [2020-10-26 19:25:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280669013] [2020-10-26 19:25:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:52,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:25:57,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:25:57,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:25:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:25:57,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:57,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:57,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:57,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-26 19:25:57,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280669013] [2020-10-26 19:25:57,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:57,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:25:57,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051291620] [2020-10-26 19:25:57,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:25:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:25:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:57,919 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-10-26 19:25:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:58,131 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-26 19:25:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:25:58,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-26 19:25:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:58,135 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:25:58,136 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:25:58,137 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 19:25:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:25:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:25:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:25:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 19:25:58,154 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 62 [2020-10-26 19:25:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:58,155 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 19:25:58,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:25:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 19:25:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:25:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:58,159 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:58,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:25:58,160 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1930890522, now seen corresponding path program 6 times [2020-10-26 19:25:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:58,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53184169] [2020-10-26 19:25:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:58,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:03,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:03,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:03,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:03,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:03,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 19:26:03,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53184169] [2020-10-26 19:26:03,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:03,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:03,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292991480] [2020-10-26 19:26:03,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:03,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:03,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:03,332 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2020-10-26 19:26:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:03,554 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-26 19:26:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:03,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-26 19:26:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:03,556 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:26:03,556 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:26:03,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:26:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-26 19:26:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:26:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-26 19:26:03,566 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 69 [2020-10-26 19:26:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:03,567 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-26 19:26:03,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-26 19:26:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:26:03,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:03,568 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:03,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:03,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash -154101871, now seen corresponding path program 7 times [2020-10-26 19:26:03,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:03,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311604452] [2020-10-26 19:26:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:26:08,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:08,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:08,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:26:08,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:08,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-26 19:26:08,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311604452] [2020-10-26 19:26:08,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:08,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359372121] [2020-10-26 19:26:08,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:08,736 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-26 19:26:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:08,970 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-26 19:26:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:08,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-26 19:26:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:08,972 INFO L225 Difference]: With dead ends: 155 [2020-10-26 19:26:08,972 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:26:08,973 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 19:26:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:26:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-26 19:26:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:26:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:26:08,985 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 76 [2020-10-26 19:26:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:08,986 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:26:08,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:26:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:26:08,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:08,991 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:08,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:08,991 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:08,992 INFO L82 PathProgramCache]: Analyzing trace with hash -705536890, now seen corresponding path program 8 times [2020-10-26 19:26:08,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:08,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753403379] [2020-10-26 19:26:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:14,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:26:14,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:14,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:14,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:14,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:14,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-26 19:26:14,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753403379] [2020-10-26 19:26:14,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:14,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:14,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194049706] [2020-10-26 19:26:14,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:14,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:14,180 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-26 19:26:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:14,454 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2020-10-26 19:26:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:14,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-26 19:26:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:14,456 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:26:14,456 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:26:14,457 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 19:26:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:26:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-26 19:26:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:26:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-26 19:26:14,479 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 83 [2020-10-26 19:26:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-26 19:26:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-26 19:26:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:26:14,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:14,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:14,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:14,485 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1418917617, now seen corresponding path program 9 times [2020-10-26 19:26:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846218229] [2020-10-26 19:26:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:26:19,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:19,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-26 19:26:19,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846218229] [2020-10-26 19:26:19,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476236033] [2020-10-26 19:26:19,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:19,690 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 13 states. [2020-10-26 19:26:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:19,953 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-26 19:26:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:19,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-26 19:26:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:19,955 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:26:19,955 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:26:19,957 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 19:26:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:26:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:26:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:26:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-26 19:26:19,979 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 90 [2020-10-26 19:26:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:19,979 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-26 19:26:19,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-26 19:26:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:26:19,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:19,983 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:19,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:19,984 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 799321638, now seen corresponding path program 10 times [2020-10-26 19:26:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:19,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501917434] [2020-10-26 19:26:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:20,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:25,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:25,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:26:25,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501917434] [2020-10-26 19:26:25,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:25,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:25,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677928153] [2020-10-26 19:26:25,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:25,178 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2020-10-26 19:26:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:25,484 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-26 19:26:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:25,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-26 19:26:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:25,486 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:26:25,487 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:26:25,488 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 19:26:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:26:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-26 19:26:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:26:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-26 19:26:25,512 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 97 [2020-10-26 19:26:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-26 19:26:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-26 19:26:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:26:25,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:25,514 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:25,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:25,515 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash -238096815, now seen corresponding path program 11 times [2020-10-26 19:26:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:25,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117477936] [2020-10-26 19:26:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:30,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:30,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:30,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-26 19:26:30,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117477936] [2020-10-26 19:26:30,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:30,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257587413] [2020-10-26 19:26:30,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:30,738 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 15 states. [2020-10-26 19:26:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:30,973 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2020-10-26 19:26:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:30,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-26 19:26:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:30,975 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:26:30,975 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:26:30,976 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 19:26:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:26:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-26 19:26:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:26:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-26 19:26:30,987 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 104 [2020-10-26 19:26:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:30,988 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-26 19:26:30,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-26 19:26:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:26:30,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:30,993 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:30,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:30,993 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -355342394, now seen corresponding path program 12 times [2020-10-26 19:26:30,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:30,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019896283] [2020-10-26 19:26:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:31,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:36,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:36,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:36,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-26 19:26:36,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019896283] [2020-10-26 19:26:36,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:36,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:36,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082297517] [2020-10-26 19:26:36,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:36,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:36,250 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 16 states. [2020-10-26 19:26:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:36,580 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-10-26 19:26:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:36,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-26 19:26:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:36,582 INFO L225 Difference]: With dead ends: 220 [2020-10-26 19:26:36,582 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:26:36,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:26:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-26 19:26:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:26:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-26 19:26:36,591 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 111 [2020-10-26 19:26:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:36,591 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-26 19:26:36,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-26 19:26:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:26:36,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:36,592 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:36,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:36,593 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash -202211919, now seen corresponding path program 13 times [2020-10-26 19:26:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:36,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026545334] [2020-10-26 19:26:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:26:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:41,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:41,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:41,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-26 19:26:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026545334] [2020-10-26 19:26:41,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:41,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163721736] [2020-10-26 19:26:41,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:41,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:41,833 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 17 states. [2020-10-26 19:26:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:42,113 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-10-26 19:26:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:42,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-26 19:26:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:42,115 INFO L225 Difference]: With dead ends: 233 [2020-10-26 19:26:42,116 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:26:42,117 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 19:26:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:26:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:26:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:26:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-26 19:26:42,125 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 118 [2020-10-26 19:26:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:42,125 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-26 19:26:42,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-26 19:26:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:26:42,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:42,127 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:42,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:42,127 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash 181143910, now seen corresponding path program 14 times [2020-10-26 19:26:42,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:42,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175046978] [2020-10-26 19:26:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:26:47,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:47,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:26:47,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:47,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:47,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:47,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:47,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-26 19:26:47,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175046978] [2020-10-26 19:26:47,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:47,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131110077] [2020-10-26 19:26:47,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:47,389 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 18 states. [2020-10-26 19:26:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:47,705 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-26 19:26:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:47,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-10-26 19:26:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:47,706 INFO L225 Difference]: With dead ends: 246 [2020-10-26 19:26:47,706 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:26:47,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:26:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-26 19:26:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:26:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2020-10-26 19:26:47,715 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 125 [2020-10-26 19:26:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:47,718 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2020-10-26 19:26:47,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2020-10-26 19:26:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:26:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:47,720 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:47,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:47,720 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1575724305, now seen corresponding path program 15 times [2020-10-26 19:26:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:47,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033581879] [2020-10-26 19:26:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:52,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:52,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:26:52,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:52,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:52,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:52,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:52,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:52,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-26 19:26:53,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033581879] [2020-10-26 19:26:53,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23946915] [2020-10-26 19:26:53,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:53,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:53,025 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2020-10-26 19:26:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:53,397 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2020-10-26 19:26:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:53,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2020-10-26 19:26:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:53,399 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:26:53,399 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:26:53,400 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 19:26:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:26:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-26 19:26:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:26:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-26 19:26:53,408 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 132 [2020-10-26 19:26:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:53,409 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-26 19:26:53,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-26 19:26:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 19:26:53,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:53,410 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:53,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:53,411 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1701122822, now seen corresponding path program 16 times [2020-10-26 19:26:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:53,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073880840] [2020-10-26 19:26:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:58,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:58,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-26 19:26:58,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073880840] [2020-10-26 19:26:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591769704] [2020-10-26 19:26:58,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:58,724 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 20 states. [2020-10-26 19:26:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:59,155 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2020-10-26 19:26:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:59,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-26 19:26:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:59,158 INFO L225 Difference]: With dead ends: 272 [2020-10-26 19:26:59,158 INFO L226 Difference]: Without dead ends: 151 [2020-10-26 19:26:59,159 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 19:26:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-26 19:26:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-26 19:26:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-26 19:26:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-26 19:26:59,168 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 139 [2020-10-26 19:26:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:59,168 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-26 19:26:59,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-26 19:26:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:26:59,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:59,170 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:59,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:59,170 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -265788303, now seen corresponding path program 17 times [2020-10-26 19:26:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:59,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23010829] [2020-10-26 19:26:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 19:27:04,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:04,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:27:04,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:27:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:04,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:27:04,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:04,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:04,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-26 19:27:04,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23010829] [2020-10-26 19:27:04,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:27:04,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104782251] [2020-10-26 19:27:04,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:27:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:27:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:04,507 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 21 states. [2020-10-26 19:27:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:04,906 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2020-10-26 19:27:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:27:04,907 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-26 19:27:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:04,908 INFO L225 Difference]: With dead ends: 285 [2020-10-26 19:27:04,908 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:27:04,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:27:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-26 19:27:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:27:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-10-26 19:27:04,918 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 146 [2020-10-26 19:27:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:04,918 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-10-26 19:27:04,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:27:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-10-26 19:27:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:27:04,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:04,920 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:04,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:27:04,920 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1024523098, now seen corresponding path program 18 times [2020-10-26 19:27:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:04,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555762301] [2020-10-26 19:27:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:09,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:09,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:09,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:10,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-26 19:27:10,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555762301] [2020-10-26 19:27:10,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:10,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:10,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005978297] [2020-10-26 19:27:10,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:10,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:10,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:10,307 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 22 states. [2020-10-26 19:27:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:10,731 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2020-10-26 19:27:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:10,732 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-26 19:27:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:10,734 INFO L225 Difference]: With dead ends: 298 [2020-10-26 19:27:10,734 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:27:10,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:27:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-26 19:27:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-26 19:27:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-26 19:27:10,744 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 153 [2020-10-26 19:27:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:10,744 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-26 19:27:10,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-26 19:27:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 19:27:10,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:10,746 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:10,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:10,747 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 144096209, now seen corresponding path program 19 times [2020-10-26 19:27:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:10,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163723718] [2020-10-26 19:27:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:15,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:16,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:16,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:16,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-26 19:27:16,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163723718] [2020-10-26 19:27:16,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:16,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959946944] [2020-10-26 19:27:16,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:16,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:16,133 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 23 states. [2020-10-26 19:27:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:16,585 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-26 19:27:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:16,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-26 19:27:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:16,588 INFO L225 Difference]: With dead ends: 311 [2020-10-26 19:27:16,588 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:27:16,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:27:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-26 19:27:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-26 19:27:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-10-26 19:27:16,598 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 160 [2020-10-26 19:27:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:16,599 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-10-26 19:27:16,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-10-26 19:27:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:27:16,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:16,601 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:16,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:16,601 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:16,602 INFO L82 PathProgramCache]: Analyzing trace with hash -29630906, now seen corresponding path program 20 times [2020-10-26 19:27:16,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:16,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298801607] [2020-10-26 19:27:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:21,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:21,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-26 19:27:22,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298801607] [2020-10-26 19:27:22,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:22,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686705546] [2020-10-26 19:27:22,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:22,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:22,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:22,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:22,049 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 24 states. [2020-10-26 19:27:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:22,483 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2020-10-26 19:27:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:22,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-26 19:27:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:22,485 INFO L225 Difference]: With dead ends: 324 [2020-10-26 19:27:22,486 INFO L226 Difference]: Without dead ends: 179 [2020-10-26 19:27:22,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-26 19:27:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-26 19:27:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-26 19:27:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2020-10-26 19:27:22,497 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 167 [2020-10-26 19:27:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:22,497 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2020-10-26 19:27:22,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2020-10-26 19:27:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-26 19:27:22,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:22,500 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:22,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:22,500 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2103137487, now seen corresponding path program 21 times [2020-10-26 19:27:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:22,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976968530] [2020-10-26 19:27:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:22,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:27,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:27,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:27:27,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 19:27:27,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:27,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:27,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:27,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:27,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:27,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-26 19:27:27,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976968530] [2020-10-26 19:27:27,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:27,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:27,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554100508] [2020-10-26 19:27:27,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:27,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:27,964 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand 25 states. [2020-10-26 19:27:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:28,353 INFO L93 Difference]: Finished difference Result 337 states and 357 transitions. [2020-10-26 19:27:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:28,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-10-26 19:27:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:28,358 INFO L225 Difference]: With dead ends: 337 [2020-10-26 19:27:28,358 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:27:28,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:27:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:27:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:27:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2020-10-26 19:27:28,375 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 174 [2020-10-26 19:27:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:28,375 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2020-10-26 19:27:28,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2020-10-26 19:27:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:27:28,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:28,380 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:28,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:28,380 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 614309862, now seen corresponding path program 22 times [2020-10-26 19:27:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:28,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959115081] [2020-10-26 19:27:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:33,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:33,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-26 19:27:33,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959115081] [2020-10-26 19:27:33,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:33,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:33,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727927311] [2020-10-26 19:27:33,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:33,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:33,858 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 26 states. [2020-10-26 19:27:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:34,337 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2020-10-26 19:27:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:34,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 181 [2020-10-26 19:27:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:34,339 INFO L225 Difference]: With dead ends: 350 [2020-10-26 19:27:34,339 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:27:34,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:27:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-26 19:27:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-26 19:27:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-10-26 19:27:34,354 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 181 [2020-10-26 19:27:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:34,355 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-10-26 19:27:34,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-10-26 19:27:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 19:27:34,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:34,356 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:34,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:34,356 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1757400431, now seen corresponding path program 23 times [2020-10-26 19:27:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:34,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073849412] [2020-10-26 19:27:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:34,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:39,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-26 19:27:39,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:39,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:27:39,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:39,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:39,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:39,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:39,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-26 19:27:39,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073849412] [2020-10-26 19:27:39,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:39,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:39,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947994017] [2020-10-26 19:27:39,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:39,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:39,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:39,865 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 27 states. [2020-10-26 19:27:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:40,419 INFO L93 Difference]: Finished difference Result 363 states and 383 transitions. [2020-10-26 19:27:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:40,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-26 19:27:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:40,421 INFO L225 Difference]: With dead ends: 363 [2020-10-26 19:27:40,422 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:27:40,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:27:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-26 19:27:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-26 19:27:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-26 19:27:40,433 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 188 [2020-10-26 19:27:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:40,434 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-26 19:27:40,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-26 19:27:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-26 19:27:40,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:40,435 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:40,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:40,436 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1780070010, now seen corresponding path program 24 times [2020-10-26 19:27:40,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:40,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494841113] [2020-10-26 19:27:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:45,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:45,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:45,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:45,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:27:45,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:45,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-26 19:27:46,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494841113] [2020-10-26 19:27:46,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:46,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:46,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501132063] [2020-10-26 19:27:46,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:46,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:46,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:46,041 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 28 states. [2020-10-26 19:27:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:46,599 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2020-10-26 19:27:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:46,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-26 19:27:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:46,602 INFO L225 Difference]: With dead ends: 376 [2020-10-26 19:27:46,602 INFO L226 Difference]: Without dead ends: 207 [2020-10-26 19:27:46,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-26 19:27:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-26 19:27:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:27:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2020-10-26 19:27:46,613 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 195 [2020-10-26 19:27:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2020-10-26 19:27:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2020-10-26 19:27:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:27:46,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:46,617 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:46,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:46,617 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1126739471, now seen corresponding path program 25 times [2020-10-26 19:27:46,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:46,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203656308] [2020-10-26 19:27:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:27:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:52,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:52,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:52,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:52,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:52,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:52,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:52,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:52,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:52,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-26 19:27:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203656308] [2020-10-26 19:27:52,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:52,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695195401] [2020-10-26 19:27:52,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:52,246 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand 29 states. [2020-10-26 19:27:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:52,806 INFO L93 Difference]: Finished difference Result 389 states and 409 transitions. [2020-10-26 19:27:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:52,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-26 19:27:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:52,808 INFO L225 Difference]: With dead ends: 389 [2020-10-26 19:27:52,808 INFO L226 Difference]: Without dead ends: 214 [2020-10-26 19:27:52,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-26 19:27:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-26 19:27:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:27:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2020-10-26 19:27:52,825 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 202 [2020-10-26 19:27:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:52,825 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2020-10-26 19:27:52,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2020-10-26 19:27:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 19:27:52,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:52,828 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:52,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:27:52,829 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash 610786086, now seen corresponding path program 26 times [2020-10-26 19:27:52,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:52,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265345601] [2020-10-26 19:27:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:27:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:58,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:58,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:58,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-26 19:27:58,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265345601] [2020-10-26 19:27:58,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:58,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257494777] [2020-10-26 19:27:58,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:58,445 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand 30 states. [2020-10-26 19:27:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:59,034 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2020-10-26 19:27:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:27:59,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 209 [2020-10-26 19:27:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:59,036 INFO L225 Difference]: With dead ends: 402 [2020-10-26 19:27:59,037 INFO L226 Difference]: Without dead ends: 221 [2020-10-26 19:27:59,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-26 19:27:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-26 19:27:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-26 19:27:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2020-10-26 19:27:59,049 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 209 [2020-10-26 19:27:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:59,049 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2020-10-26 19:27:59,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:27:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2020-10-26 19:27:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-26 19:27:59,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:59,051 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:59,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:27:59,051 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:59,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2024273583, now seen corresponding path program 27 times [2020-10-26 19:27:59,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:59,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090345554] [2020-10-26 19:27:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:59,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:04,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:04,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:28:04,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:04,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:04,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:04,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:04,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:04,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-26 19:28:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090345554] [2020-10-26 19:28:04,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:04,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:28:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192330602] [2020-10-26 19:28:04,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:28:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:28:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:04,660 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand 31 states. [2020-10-26 19:28:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:05,224 INFO L93 Difference]: Finished difference Result 415 states and 435 transitions. [2020-10-26 19:28:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:28:05,225 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-10-26 19:28:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:05,226 INFO L225 Difference]: With dead ends: 415 [2020-10-26 19:28:05,226 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 19:28:05,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 19:28:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-26 19:28:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-26 19:28:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2020-10-26 19:28:05,237 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 216 [2020-10-26 19:28:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:05,238 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2020-10-26 19:28:05,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:28:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2020-10-26 19:28:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 19:28:05,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:05,240 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:05,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:28:05,240 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash 888427718, now seen corresponding path program 28 times [2020-10-26 19:28:05,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:05,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212674029] [2020-10-26 19:28:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:05,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:10,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:10,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:10,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-26 19:28:10,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212674029] [2020-10-26 19:28:10,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:10,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:10,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180488829] [2020-10-26 19:28:10,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:10,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:10,918 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 32 states. [2020-10-26 19:28:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:11,573 INFO L93 Difference]: Finished difference Result 428 states and 448 transitions. [2020-10-26 19:28:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:11,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2020-10-26 19:28:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:11,575 INFO L225 Difference]: With dead ends: 428 [2020-10-26 19:28:11,576 INFO L226 Difference]: Without dead ends: 235 [2020-10-26 19:28:11,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-26 19:28:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-26 19:28:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-26 19:28:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-26 19:28:11,587 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 223 [2020-10-26 19:28:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:11,587 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-26 19:28:11,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-26 19:28:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 19:28:11,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:11,589 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:11,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:11,589 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2010097487, now seen corresponding path program 29 times [2020-10-26 19:28:11,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:11,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879611028] [2020-10-26 19:28:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:11,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:17,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:17,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:17,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:17,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:17,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:17,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:17,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:17,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-26 19:28:17,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879611028] [2020-10-26 19:28:17,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:17,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009751629] [2020-10-26 19:28:17,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:17,309 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 33 states. [2020-10-26 19:28:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:17,847 INFO L93 Difference]: Finished difference Result 441 states and 461 transitions. [2020-10-26 19:28:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:17,847 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 230 [2020-10-26 19:28:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:17,849 INFO L225 Difference]: With dead ends: 441 [2020-10-26 19:28:17,849 INFO L226 Difference]: Without dead ends: 242 [2020-10-26 19:28:17,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-26 19:28:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-26 19:28:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-26 19:28:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2020-10-26 19:28:17,861 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 230 [2020-10-26 19:28:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:17,861 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2020-10-26 19:28:17,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2020-10-26 19:28:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 19:28:17,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:17,863 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:17,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:17,863 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -555895194, now seen corresponding path program 30 times [2020-10-26 19:28:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:17,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718678447] [2020-10-26 19:28:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:18,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:23,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:23,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:23,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-26 19:28:23,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718678447] [2020-10-26 19:28:23,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:23,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:23,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621258478] [2020-10-26 19:28:23,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:23,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:23,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:23,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:23,675 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 34 states. [2020-10-26 19:28:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:24,315 INFO L93 Difference]: Finished difference Result 454 states and 474 transitions. [2020-10-26 19:28:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:24,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 237 [2020-10-26 19:28:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:24,317 INFO L225 Difference]: With dead ends: 454 [2020-10-26 19:28:24,317 INFO L226 Difference]: Without dead ends: 249 [2020-10-26 19:28:24,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-26 19:28:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-26 19:28:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-26 19:28:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-26 19:28:24,329 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 237 [2020-10-26 19:28:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:24,330 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-26 19:28:24,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-26 19:28:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 19:28:24,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:24,331 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:24,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:24,332 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 776880145, now seen corresponding path program 31 times [2020-10-26 19:28:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:24,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338337910] [2020-10-26 19:28:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:24,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:25,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:29,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-26 19:28:29,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:30,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-26 19:28:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338337910] [2020-10-26 19:28:30,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:30,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742627666] [2020-10-26 19:28:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:30,180 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 35 states. [2020-10-26 19:28:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:30,767 INFO L93 Difference]: Finished difference Result 467 states and 487 transitions. [2020-10-26 19:28:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:30,768 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 244 [2020-10-26 19:28:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:30,770 INFO L225 Difference]: With dead ends: 467 [2020-10-26 19:28:30,771 INFO L226 Difference]: Without dead ends: 256 [2020-10-26 19:28:30,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-26 19:28:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-26 19:28:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-26 19:28:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-26 19:28:30,782 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 244 [2020-10-26 19:28:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:30,783 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-26 19:28:30,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-26 19:28:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 19:28:30,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:30,784 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:30,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:30,785 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 200671238, now seen corresponding path program 32 times [2020-10-26 19:28:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:30,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025803143] [2020-10-26 19:28:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:36,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:36,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-26 19:28:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025803143] [2020-10-26 19:28:36,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:36,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:36,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178165508] [2020-10-26 19:28:36,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:36,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:36,670 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 36 states. [2020-10-26 19:28:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:37,347 INFO L93 Difference]: Finished difference Result 480 states and 500 transitions. [2020-10-26 19:28:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:37,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 251 [2020-10-26 19:28:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:37,349 INFO L225 Difference]: With dead ends: 480 [2020-10-26 19:28:37,349 INFO L226 Difference]: Without dead ends: 263 [2020-10-26 19:28:37,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-26 19:28:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2020-10-26 19:28:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-26 19:28:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 270 transitions. [2020-10-26 19:28:37,360 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 270 transitions. Word has length 251 [2020-10-26 19:28:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:37,361 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 270 transitions. [2020-10-26 19:28:37,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 270 transitions. [2020-10-26 19:28:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:28:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:37,362 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:37,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:37,363 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1507868815, now seen corresponding path program 33 times [2020-10-26 19:28:37,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:37,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334991324] [2020-10-26 19:28:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:42,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 19:28:42,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:28:42,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:43,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:43,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:43,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-26 19:28:43,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334991324] [2020-10-26 19:28:43,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:43,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267931077] [2020-10-26 19:28:43,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:43,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:43,255 INFO L87 Difference]: Start difference. First operand 263 states and 270 transitions. Second operand 37 states. [2020-10-26 19:28:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:43,998 INFO L93 Difference]: Finished difference Result 493 states and 513 transitions. [2020-10-26 19:28:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:43,999 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-26 19:28:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:44,001 INFO L225 Difference]: With dead ends: 493 [2020-10-26 19:28:44,001 INFO L226 Difference]: Without dead ends: 270 [2020-10-26 19:28:44,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-26 19:28:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-26 19:28:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-26 19:28:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-26 19:28:44,013 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 258 [2020-10-26 19:28:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:44,014 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-26 19:28:44,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-26 19:28:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 19:28:44,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:44,016 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:44,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:44,016 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1735446106, now seen corresponding path program 34 times [2020-10-26 19:28:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:44,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886406566] [2020-10-26 19:28:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:49,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 19:28:49,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:49,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:28:49,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:49,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:28:49,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:49,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:28:49,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:49,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2020-10-26 19:28:50,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886406566] [2020-10-26 19:28:50,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:50,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:28:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431280428] [2020-10-26 19:28:50,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:28:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:28:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:50,020 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 38 states. [2020-10-26 19:28:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:50,813 INFO L93 Difference]: Finished difference Result 506 states and 526 transitions. [2020-10-26 19:28:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:28:50,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 265 [2020-10-26 19:28:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:50,816 INFO L225 Difference]: With dead ends: 506 [2020-10-26 19:28:50,816 INFO L226 Difference]: Without dead ends: 277 [2020-10-26 19:28:50,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-26 19:28:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-26 19:28:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-26 19:28:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2020-10-26 19:28:50,826 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 265 [2020-10-26 19:28:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:50,827 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2020-10-26 19:28:50,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:28:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2020-10-26 19:28:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 19:28:50,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:50,829 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:28:50,829 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1181559087, now seen corresponding path program 35 times [2020-10-26 19:28:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:50,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297587437] [2020-10-26 19:28:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:50,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:51,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:55,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:55,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 19:28:55,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:55,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:28:55,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:55,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:28:55,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:55,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:28:55,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:56,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:56,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:56,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:56,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:56,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2020-10-26 19:28:56,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297587437] [2020-10-26 19:28:56,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:56,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:28:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353797475] [2020-10-26 19:28:56,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:28:56,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:28:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:56,893 INFO L87 Difference]: Start difference. First operand 277 states and 284 transitions. Second operand 39 states. [2020-10-26 19:28:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:57,547 INFO L93 Difference]: Finished difference Result 519 states and 539 transitions. [2020-10-26 19:28:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:28:57,548 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 272 [2020-10-26 19:28:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:57,550 INFO L225 Difference]: With dead ends: 519 [2020-10-26 19:28:57,550 INFO L226 Difference]: Without dead ends: 284 [2020-10-26 19:28:57,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-26 19:28:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-26 19:28:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-26 19:28:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-26 19:28:57,560 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 272 [2020-10-26 19:28:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:57,561 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-26 19:28:57,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:28:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-26 19:28:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-26 19:28:57,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:57,563 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:57,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:28:57,563 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1937460038, now seen corresponding path program 36 times [2020-10-26 19:28:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:57,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504033904] [2020-10-26 19:28:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:57,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:29:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:29:02,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:03,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:03,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:03,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-10-26 19:29:03,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504033904] [2020-10-26 19:29:03,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:03,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:29:03,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299798166] [2020-10-26 19:29:03,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:29:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:29:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:03,593 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 40 states. [2020-10-26 19:29:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:04,304 INFO L93 Difference]: Finished difference Result 532 states and 552 transitions. [2020-10-26 19:29:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:29:04,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 279 [2020-10-26 19:29:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:04,306 INFO L225 Difference]: With dead ends: 532 [2020-10-26 19:29:04,307 INFO L226 Difference]: Without dead ends: 291 [2020-10-26 19:29:04,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-26 19:29:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-10-26 19:29:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-26 19:29:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 298 transitions. [2020-10-26 19:29:04,317 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 298 transitions. Word has length 279 [2020-10-26 19:29:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:04,318 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 298 transitions. [2020-10-26 19:29:04,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:29:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 298 transitions. [2020-10-26 19:29:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-26 19:29:04,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:04,320 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:04,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:29:04,320 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1340766671, now seen corresponding path program 37 times [2020-10-26 19:29:04,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:04,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905446964] [2020-10-26 19:29:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:29:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:09,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:29:09,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:10,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:10,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:10,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4921 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4218 trivial. 0 not checked. [2020-10-26 19:29:10,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905446964] [2020-10-26 19:29:10,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:10,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:29:10,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034245298] [2020-10-26 19:29:10,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:29:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:10,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:29:10,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:29:10,439 INFO L87 Difference]: Start difference. First operand 291 states and 298 transitions. Second operand 41 states. [2020-10-26 19:29:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:11,306 INFO L93 Difference]: Finished difference Result 545 states and 565 transitions. [2020-10-26 19:29:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:29:11,307 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 286 [2020-10-26 19:29:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:11,309 INFO L225 Difference]: With dead ends: 545 [2020-10-26 19:29:11,309 INFO L226 Difference]: Without dead ends: 298 [2020-10-26 19:29:11,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:29:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-26 19:29:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-26 19:29:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-26 19:29:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2020-10-26 19:29:11,329 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 286 [2020-10-26 19:29:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:11,330 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2020-10-26 19:29:11,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:29:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2020-10-26 19:29:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-26 19:29:11,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:11,336 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:11,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:29:11,336 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1106490138, now seen corresponding path program 38 times [2020-10-26 19:29:11,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:11,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400628399] [2020-10-26 19:29:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:11,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:16,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:29:16,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5187 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 4446 trivial. 0 not checked. [2020-10-26 19:29:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400628399] [2020-10-26 19:29:17,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:17,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:29:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275749514] [2020-10-26 19:29:17,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:29:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:29:17,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:29:17,501 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand 42 states. [2020-10-26 19:29:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:18,237 INFO L93 Difference]: Finished difference Result 558 states and 578 transitions. [2020-10-26 19:29:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:29:18,238 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 293 [2020-10-26 19:29:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:18,240 INFO L225 Difference]: With dead ends: 558 [2020-10-26 19:29:18,240 INFO L226 Difference]: Without dead ends: 305 [2020-10-26 19:29:18,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:29:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-26 19:29:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-10-26 19:29:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-26 19:29:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 312 transitions. [2020-10-26 19:29:18,252 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 312 transitions. Word has length 293 [2020-10-26 19:29:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:18,252 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 312 transitions. [2020-10-26 19:29:18,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:29:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 312 transitions. [2020-10-26 19:29:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-26 19:29:18,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:18,255 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:18,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:29:18,255 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash 781569425, now seen corresponding path program 39 times [2020-10-26 19:29:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:18,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286115611] [2020-10-26 19:29:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:18,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:18,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:29:23,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:24,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:24,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 4680 trivial. 0 not checked. [2020-10-26 19:29:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286115611] [2020-10-26 19:29:24,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:24,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:29:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901078709] [2020-10-26 19:29:24,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:29:24,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:29:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:29:24,463 INFO L87 Difference]: Start difference. First operand 305 states and 312 transitions. Second operand 43 states. [2020-10-26 19:29:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:25,251 INFO L93 Difference]: Finished difference Result 571 states and 591 transitions. [2020-10-26 19:29:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:29:25,252 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 300 [2020-10-26 19:29:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:25,254 INFO L225 Difference]: With dead ends: 571 [2020-10-26 19:29:25,255 INFO L226 Difference]: Without dead ends: 312 [2020-10-26 19:29:25,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:29:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-26 19:29:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-26 19:29:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-26 19:29:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2020-10-26 19:29:25,266 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 300 [2020-10-26 19:29:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:25,266 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2020-10-26 19:29:25,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:29:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2020-10-26 19:29:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-26 19:29:25,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,268 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:25,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:29:25,269 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -334219642, now seen corresponding path program 40 times [2020-10-26 19:29:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249040390] [2020-10-26 19:29:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking...