/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:46:01,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:46:01,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:46:01,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:46:01,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:46:01,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:46:01,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:46:01,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:46:01,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:46:01,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:46:01,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:46:01,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:46:01,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:46:01,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:46:01,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:46:01,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:46:01,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:46:01,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:46:01,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:46:01,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:46:01,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:46:01,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:46:01,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:46:01,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:46:01,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:46:01,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:46:01,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:46:01,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:46:01,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:46:01,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:46:01,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:46:01,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:46:01,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:46:01,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:46:01,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:46:01,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:46:01,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:46:01,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:46:01,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:46:01,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:46:01,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:46:01,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:46:01,530 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:46:01,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:46:01,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:46:01,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:46:01,536 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:46:01,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:46:01,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:46:01,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:46:01,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:46:01,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:46:01,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:46:01,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:46:01,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:46:01,539 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:46:01,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:46:01,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:46:01,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:46:01,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:46:01,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:46:01,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:46:01,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:46:01,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:46:01,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:46:01,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:46:01,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:46:01,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:46:01,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:46:01,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:46:01,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:46:01,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:46:01,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:46:02,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:46:02,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:46:02,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:46:02,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:46:02,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-29 03:46:02,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff927f54/cf14246fb3db4231ad5e56178c102a1c/FLAG4b02d1845 [2020-10-29 03:46:02,748 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:46:02,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-29 03:46:02,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff927f54/cf14246fb3db4231ad5e56178c102a1c/FLAG4b02d1845 [2020-10-29 03:46:03,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fff927f54/cf14246fb3db4231ad5e56178c102a1c [2020-10-29 03:46:03,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:46:03,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:46:03,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:46:03,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:46:03,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:46:03,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1e8173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03, skipping insertion in model container [2020-10-29 03:46:03,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:46:03,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:46:03,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:46:03,327 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:46:03,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:46:03,371 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:46:03,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03 WrapperNode [2020-10-29 03:46:03,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:46:03,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:46:03,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:46:03,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:46:03,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... [2020-10-29 03:46:03,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:46:03,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:46:03,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:46:03,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:46:03,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:46:03,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:46:03,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:46:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:46:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:46:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:46:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:46:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:46:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:46:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:46:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:46:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:46:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:46:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:46:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:46:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:46:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:46:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:46:04,010 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:46:04,010 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 03:46:04,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:46:04 BoogieIcfgContainer [2020-10-29 03:46:04,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:46:04,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:46:04,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:46:04,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:46:04,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:46:03" (1/3) ... [2020-10-29 03:46:04,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770072d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:46:04, skipping insertion in model container [2020-10-29 03:46:04,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:46:03" (2/3) ... [2020-10-29 03:46:04,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770072d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:46:04, skipping insertion in model container [2020-10-29 03:46:04,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:46:04" (3/3) ... [2020-10-29 03:46:04,030 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2020-10-29 03:46:04,067 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:46:04,073 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:46:04,089 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:46:04,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:46:04,122 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:46:04,122 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:46:04,122 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:46:04,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:46:04,123 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:46:04,123 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:46:04,123 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:46:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 03:46:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 03:46:04,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:04,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:04,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1112199025, now seen corresponding path program 1 times [2020-10-29 03:46:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648921328] [2020-10-29 03:46:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:04,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:04,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:04,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:04,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:04,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 03:46:04,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:46:04,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-29 03:46:04,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:04,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:04,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:46:04,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 03:46:04,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 03:46:04,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:46:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:04,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:04,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:04,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:04,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:46:04,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:04,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:04,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:04,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:46:04,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648921328] [2020-10-29 03:46:04,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:46:04,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 03:46:04,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121575269] [2020-10-29 03:46:05,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:46:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:05,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:46:05,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:46:05,021 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-29 03:46:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:05,400 INFO L93 Difference]: Finished difference Result 78 states and 110 transitions. [2020-10-29 03:46:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:46:05,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 03:46:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:05,412 INFO L225 Difference]: With dead ends: 78 [2020-10-29 03:46:05,412 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 03:46:05,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:46:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 03:46:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 03:46:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 03:46:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-29 03:46:05,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2020-10-29 03:46:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:05,467 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-29 03:46:05,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:46:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-29 03:46:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:46:05,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:05,469 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] [2020-10-29 03:46:05,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:46:05,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1872127637, now seen corresponding path program 1 times [2020-10-29 03:46:05,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446940612] [2020-10-29 03:46:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:06,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:06,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:46:06,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:46:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-29 03:46:06,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:06,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:46:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 03:46:06,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 03:46:06,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:06,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:06,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:06,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:46:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:06,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:06,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:06,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:46:06,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446940612] [2020-10-29 03:46:06,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:06,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 03:46:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103407018] [2020-10-29 03:46:06,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:46:06,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:46:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:46:06,829 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 5 states. [2020-10-29 03:46:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:07,042 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2020-10-29 03:46:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:46:07,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-29 03:46:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:07,045 INFO L225 Difference]: With dead ends: 95 [2020-10-29 03:46:07,045 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 03:46:07,047 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 [2020-10-29 03:46:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 03:46:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-29 03:46:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 03:46:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-10-29 03:46:07,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 24 [2020-10-29 03:46:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:07,060 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-10-29 03:46:07,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:46:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-10-29 03:46:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:46:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:07,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:07,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:46:07,062 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 424207484, now seen corresponding path program 1 times [2020-10-29 03:46:07,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:07,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979221507] [2020-10-29 03:46:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:07,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:12,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:12,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:46:12,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:46:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 03:46:12,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:12,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:46:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:46:12,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:46:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:12,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:12,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:46:12,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:12,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:12,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:46:12,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979221507] [2020-10-29 03:46:12,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:12,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 03:46:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258874734] [2020-10-29 03:46:12,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 03:46:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 03:46:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:46:12,396 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 7 states. [2020-10-29 03:46:13,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:13,172 INFO L93 Difference]: Finished difference Result 109 states and 154 transitions. [2020-10-29 03:46:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:46:13,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-29 03:46:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:13,180 INFO L225 Difference]: With dead ends: 109 [2020-10-29 03:46:13,181 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:46:13,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:46:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:46:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2020-10-29 03:46:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:46:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-10-29 03:46:13,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 41 [2020-10-29 03:46:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:13,215 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-10-29 03:46:13,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 03:46:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-10-29 03:46:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:46:13,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:13,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:13,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:46:13,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -596860870, now seen corresponding path program 1 times [2020-10-29 03:46:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:13,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183122779] [2020-10-29 03:46:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:13,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:18,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:18,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:46:18,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:46:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:46:18,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:18,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:46:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:46:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:46:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:18,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:18,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:18,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:18,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:18,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:46:18,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:18,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:18,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:46:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183122779] [2020-10-29 03:46:18,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:18,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:46:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427780896] [2020-10-29 03:46:18,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:46:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:46:18,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:46:18,479 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-10-29 03:46:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:19,367 INFO L93 Difference]: Finished difference Result 174 states and 249 transitions. [2020-10-29 03:46:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:46:19,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-29 03:46:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:19,373 INFO L225 Difference]: With dead ends: 174 [2020-10-29 03:46:19,373 INFO L226 Difference]: Without dead ends: 151 [2020-10-29 03:46:19,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:46:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-29 03:46:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2020-10-29 03:46:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 03:46:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2020-10-29 03:46:19,404 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 128 transitions. Word has length 41 [2020-10-29 03:46:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:19,405 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 128 transitions. [2020-10-29 03:46:19,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:46:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 128 transitions. [2020-10-29 03:46:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:46:19,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:19,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:19,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:46:19,410 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash -338695432, now seen corresponding path program 1 times [2020-10-29 03:46:19,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:19,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096367305] [2020-10-29 03:46:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:19,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:22,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:22,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:23,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:23,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:24,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:24,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:46:24,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 03:46:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:46:24,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:24,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:46:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:46:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:46:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:24,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:24,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:24,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:24,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:24,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:46:24,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:24,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:24,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:24,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:24,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:24,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:46:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:46:24,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096367305] [2020-10-29 03:46:24,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:24,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:46:24,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665713364] [2020-10-29 03:46:24,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:46:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:46:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:46:24,660 INFO L87 Difference]: Start difference. First operand 94 states and 128 transitions. Second operand 9 states. [2020-10-29 03:46:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:25,422 INFO L93 Difference]: Finished difference Result 169 states and 230 transitions. [2020-10-29 03:46:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:46:25,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-29 03:46:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:25,425 INFO L225 Difference]: With dead ends: 169 [2020-10-29 03:46:25,425 INFO L226 Difference]: Without dead ends: 153 [2020-10-29 03:46:25,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:46:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-29 03:46:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 100. [2020-10-29 03:46:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 03:46:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2020-10-29 03:46:25,453 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 41 [2020-10-29 03:46:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:25,454 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2020-10-29 03:46:25,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:46:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2020-10-29 03:46:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:46:25,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:25,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:25,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:46:25,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 341362938, now seen corresponding path program 1 times [2020-10-29 03:46:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:25,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180454834] [2020-10-29 03:46:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:25,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:25,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:25,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:25,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:28,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:30,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:30,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:46:30,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:46:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:46:30,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:30,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:46:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:46:30,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:46:30,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:30,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:30,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:30,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:30,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:30,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:46:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180454834] [2020-10-29 03:46:30,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:30,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:46:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352476046] [2020-10-29 03:46:30,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:46:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:46:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:46:30,781 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand 10 states. [2020-10-29 03:46:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:31,476 INFO L93 Difference]: Finished difference Result 205 states and 282 transitions. [2020-10-29 03:46:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:46:31,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-29 03:46:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:31,479 INFO L225 Difference]: With dead ends: 205 [2020-10-29 03:46:31,479 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 03:46:31,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:46:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 03:46:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 126. [2020-10-29 03:46:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-29 03:46:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 174 transitions. [2020-10-29 03:46:31,507 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 174 transitions. Word has length 41 [2020-10-29 03:46:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:31,510 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 174 transitions. [2020-10-29 03:46:31,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:46:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 174 transitions. [2020-10-29 03:46:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:46:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:31,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:31,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:46:31,513 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -51664072, now seen corresponding path program 1 times [2020-10-29 03:46:31,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:31,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561389413] [2020-10-29 03:46:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:31,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:36,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:46:36,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:46:36,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:46:36,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:36,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:46:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 03:46:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:46:36,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:36,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:36,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:36,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:36,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:46:36,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:36,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:36,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:36,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:46:36,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561389413] [2020-10-29 03:46:36,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:36,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:46:36,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337346184] [2020-10-29 03:46:36,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:46:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:46:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:46:36,634 INFO L87 Difference]: Start difference. First operand 126 states and 174 transitions. Second operand 6 states. [2020-10-29 03:46:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:36,853 INFO L93 Difference]: Finished difference Result 294 states and 413 transitions. [2020-10-29 03:46:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:46:36,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-29 03:46:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:36,855 INFO L225 Difference]: With dead ends: 294 [2020-10-29 03:46:36,855 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 03:46:36,857 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 [2020-10-29 03:46:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 03:46:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2020-10-29 03:46:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-29 03:46:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 208 transitions. [2020-10-29 03:46:36,882 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 208 transitions. Word has length 41 [2020-10-29 03:46:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:36,882 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 208 transitions. [2020-10-29 03:46:36,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:46:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 208 transitions. [2020-10-29 03:46:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:46:36,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:36,885 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:36,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:46:36,885 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2133974587, now seen corresponding path program 1 times [2020-10-29 03:46:36,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:36,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949000876] [2020-10-29 03:46:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:36,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:41,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:41,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:46:41,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:46:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:46:41,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:42,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:42,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:42,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:42,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:46:42,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949000876] [2020-10-29 03:46:42,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:42,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:46:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082552160] [2020-10-29 03:46:42,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:46:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:46:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:46:42,168 INFO L87 Difference]: Start difference. First operand 152 states and 208 transitions. Second operand 11 states. [2020-10-29 03:46:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:43,308 INFO L93 Difference]: Finished difference Result 279 states and 383 transitions. [2020-10-29 03:46:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:46:43,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-29 03:46:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:43,311 INFO L225 Difference]: With dead ends: 279 [2020-10-29 03:46:43,311 INFO L226 Difference]: Without dead ends: 263 [2020-10-29 03:46:43,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:46:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-29 03:46:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2020-10-29 03:46:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-29 03:46:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 272 transitions. [2020-10-29 03:46:43,325 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 272 transitions. Word has length 53 [2020-10-29 03:46:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:43,326 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 272 transitions. [2020-10-29 03:46:43,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:46:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 272 transitions. [2020-10-29 03:46:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:46:43,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:43,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:43,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:46:43,328 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1902827271, now seen corresponding path program 2 times [2020-10-29 03:46:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:43,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868221071] [2020-10-29 03:46:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:43,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:45,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:48,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:46:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:46:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:46:48,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:48,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:46:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:46:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:46:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:48,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:48,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:48,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:48,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:48,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:48,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:46:48,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868221071] [2020-10-29 03:46:48,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:48,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:46:48,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211790527] [2020-10-29 03:46:48,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:46:48,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:46:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:46:48,626 INFO L87 Difference]: Start difference. First operand 198 states and 272 transitions. Second operand 11 states. [2020-10-29 03:46:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:49,896 INFO L93 Difference]: Finished difference Result 277 states and 379 transitions. [2020-10-29 03:46:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:46:49,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-29 03:46:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:49,900 INFO L225 Difference]: With dead ends: 277 [2020-10-29 03:46:49,900 INFO L226 Difference]: Without dead ends: 261 [2020-10-29 03:46:49,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:46:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-29 03:46:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 204. [2020-10-29 03:46:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-29 03:46:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 280 transitions. [2020-10-29 03:46:49,913 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 280 transitions. Word has length 53 [2020-10-29 03:46:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:49,913 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 280 transitions. [2020-10-29 03:46:49,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:46:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 280 transitions. [2020-10-29 03:46:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:46:49,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:49,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:49,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:46:49,915 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1222768901, now seen corresponding path program 2 times [2020-10-29 03:46:49,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:49,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945658042] [2020-10-29 03:46:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:49,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:51,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:54,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:54,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:46:54,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:46:54,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:46:54,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:55,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:46:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:55,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:46:55,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:46:55,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:46:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:46:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:46:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:46:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945658042] [2020-10-29 03:46:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:46:55,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:46:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215020864] [2020-10-29 03:46:55,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:46:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:46:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:46:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:46:55,275 INFO L87 Difference]: Start difference. First operand 204 states and 280 transitions. Second operand 12 states. [2020-10-29 03:46:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:46:56,485 INFO L93 Difference]: Finished difference Result 360 states and 498 transitions. [2020-10-29 03:46:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:46:56,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-29 03:46:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:46:56,489 INFO L225 Difference]: With dead ends: 360 [2020-10-29 03:46:56,490 INFO L226 Difference]: Without dead ends: 335 [2020-10-29 03:46:56,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:46:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-29 03:46:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 276. [2020-10-29 03:46:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-29 03:46:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 385 transitions. [2020-10-29 03:46:56,506 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 385 transitions. Word has length 53 [2020-10-29 03:46:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:46:56,506 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 385 transitions. [2020-10-29 03:46:56,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:46:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 385 transitions. [2020-10-29 03:46:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:46:56,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:46:56,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:46:56,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:46:56,508 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:46:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:46:56,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1615795911, now seen corresponding path program 3 times [2020-10-29 03:46:56,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:46:56,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523665464] [2020-10-29 03:46:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:46:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:46:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:58,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:59,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:46:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:01,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:47:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:47:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:47:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:02,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:02,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:02,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:02,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:47:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523665464] [2020-10-29 03:47:02,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:02,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:47:02,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26659628] [2020-10-29 03:47:02,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:47:02,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:47:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:47:02,140 INFO L87 Difference]: Start difference. First operand 276 states and 385 transitions. Second operand 16 states. [2020-10-29 03:47:03,577 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-29 03:47:04,646 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2020-10-29 03:47:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:05,123 INFO L93 Difference]: Finished difference Result 909 states and 1277 transitions. [2020-10-29 03:47:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 03:47:05,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-29 03:47:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:05,128 INFO L225 Difference]: With dead ends: 909 [2020-10-29 03:47:05,128 INFO L226 Difference]: Without dead ends: 646 [2020-10-29 03:47:05,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=454, Invalid=2198, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 03:47:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-29 03:47:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 573. [2020-10-29 03:47:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-10-29 03:47:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 807 transitions. [2020-10-29 03:47:05,165 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 807 transitions. Word has length 53 [2020-10-29 03:47:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:05,166 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 807 transitions. [2020-10-29 03:47:05,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:47:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 807 transitions. [2020-10-29 03:47:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:47:05,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:05,168 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:05,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:47:05,168 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 375125654, now seen corresponding path program 3 times [2020-10-29 03:47:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:05,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560388551] [2020-10-29 03:47:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:05,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:05,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:05,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:10,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:10,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:47:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:47:10,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:10,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:47:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:47:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:47:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:10,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:10,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:10,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:10,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:10,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:10,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:47:10,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560388551] [2020-10-29 03:47:10,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:10,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:47:10,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404204618] [2020-10-29 03:47:10,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:47:10,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:47:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:47:10,504 INFO L87 Difference]: Start difference. First operand 573 states and 807 transitions. Second operand 13 states. [2020-10-29 03:47:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:12,187 INFO L93 Difference]: Finished difference Result 1097 states and 1544 transitions. [2020-10-29 03:47:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:47:12,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-29 03:47:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:12,194 INFO L225 Difference]: With dead ends: 1097 [2020-10-29 03:47:12,194 INFO L226 Difference]: Without dead ends: 1042 [2020-10-29 03:47:12,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:47:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2020-10-29 03:47:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 795. [2020-10-29 03:47:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-29 03:47:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1119 transitions. [2020-10-29 03:47:12,255 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1119 transitions. Word has length 65 [2020-10-29 03:47:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:12,255 INFO L481 AbstractCegarLoop]: Abstraction has 795 states and 1119 transitions. [2020-10-29 03:47:12,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:47:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1119 transitions. [2020-10-29 03:47:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:47:12,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:12,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:12,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:47:12,259 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 633291092, now seen corresponding path program 4 times [2020-10-29 03:47:12,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:12,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623831838] [2020-10-29 03:47:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:12,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:12,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:12,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:15,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:17,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:17,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:47:17,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:17,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:47:17,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:17,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:47:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:47:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:47:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:17,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:17,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:17,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:17,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:47:17,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:17,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:17,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:47:17,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623831838] [2020-10-29 03:47:17,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:17,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:47:17,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801221263] [2020-10-29 03:47:17,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:47:17,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:47:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:47:17,635 INFO L87 Difference]: Start difference. First operand 795 states and 1119 transitions. Second operand 13 states. [2020-10-29 03:47:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:19,312 INFO L93 Difference]: Finished difference Result 1086 states and 1527 transitions. [2020-10-29 03:47:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:47:19,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-29 03:47:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:19,319 INFO L225 Difference]: With dead ends: 1086 [2020-10-29 03:47:19,319 INFO L226 Difference]: Without dead ends: 1031 [2020-10-29 03:47:19,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:47:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2020-10-29 03:47:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 813. [2020-10-29 03:47:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-10-29 03:47:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1143 transitions. [2020-10-29 03:47:19,358 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1143 transitions. Word has length 65 [2020-10-29 03:47:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:19,359 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1143 transitions. [2020-10-29 03:47:19,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:47:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1143 transitions. [2020-10-29 03:47:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:47:19,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:19,362 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:19,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:47:19,362 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1313349462, now seen corresponding path program 4 times [2020-10-29 03:47:19,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:19,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959154644] [2020-10-29 03:47:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:19,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:19,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:22,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:24,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:24,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:47:24,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:47:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:47:24,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:24,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:24,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:24,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:24,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:47:24,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:24,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:47:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:47:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959154644] [2020-10-29 03:47:24,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:24,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:47:24,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833134577] [2020-10-29 03:47:24,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:47:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:47:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:47:24,854 INFO L87 Difference]: Start difference. First operand 813 states and 1143 transitions. Second operand 14 states. [2020-10-29 03:47:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:26,454 INFO L93 Difference]: Finished difference Result 1530 states and 2157 transitions. [2020-10-29 03:47:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:47:26,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-29 03:47:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:26,463 INFO L225 Difference]: With dead ends: 1530 [2020-10-29 03:47:26,463 INFO L226 Difference]: Without dead ends: 1457 [2020-10-29 03:47:26,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:47:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2020-10-29 03:47:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1173. [2020-10-29 03:47:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-10-29 03:47:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1659 transitions. [2020-10-29 03:47:26,523 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1659 transitions. Word has length 65 [2020-10-29 03:47:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:26,524 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1659 transitions. [2020-10-29 03:47:26,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:47:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1659 transitions. [2020-10-29 03:47:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:47:26,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:26,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:26,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:47:26,534 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash 920322452, now seen corresponding path program 5 times [2020-10-29 03:47:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:26,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669945878] [2020-10-29 03:47:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:26,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:29,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:29,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:31,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:31,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:47:31,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:47:31,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:32,028 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-29 03:47:32,240 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-10-29 03:47:32,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:32,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:32,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:32,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:32,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:47:32,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669945878] [2020-10-29 03:47:32,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:47:32,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863450698] [2020-10-29 03:47:32,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:47:32,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:47:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:47:32,579 INFO L87 Difference]: Start difference. First operand 1173 states and 1659 transitions. Second operand 19 states. [2020-10-29 03:47:35,090 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 03:47:35,281 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-29 03:47:36,966 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2020-10-29 03:47:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:37,196 INFO L93 Difference]: Finished difference Result 3142 states and 4422 transitions. [2020-10-29 03:47:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-29 03:47:37,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-10-29 03:47:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:37,212 INFO L225 Difference]: With dead ends: 3142 [2020-10-29 03:47:37,212 INFO L226 Difference]: Without dead ends: 1984 [2020-10-29 03:47:37,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2020-10-29 03:47:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2020-10-29 03:47:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1718. [2020-10-29 03:47:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-10-29 03:47:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2428 transitions. [2020-10-29 03:47:37,304 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2428 transitions. Word has length 65 [2020-10-29 03:47:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:37,304 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2428 transitions. [2020-10-29 03:47:37,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:47:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2428 transitions. [2020-10-29 03:47:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:47:37,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:37,310 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:37,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:47:37,311 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1925204393, now seen corresponding path program 5 times [2020-10-29 03:47:37,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:37,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261182779] [2020-10-29 03:47:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:37,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:37,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:37,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:42,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 03:47:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:42,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:42,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:42,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:42,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:42,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-29 03:47:42,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261182779] [2020-10-29 03:47:42,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:42,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:47:42,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541168090] [2020-10-29 03:47:42,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:47:42,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:47:42,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:47:42,474 INFO L87 Difference]: Start difference. First operand 1718 states and 2428 transitions. Second operand 9 states. [2020-10-29 03:47:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:42,867 INFO L93 Difference]: Finished difference Result 3812 states and 5400 transitions. [2020-10-29 03:47:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 03:47:42,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-29 03:47:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:42,879 INFO L225 Difference]: With dead ends: 3812 [2020-10-29 03:47:42,880 INFO L226 Difference]: Without dead ends: 2111 [2020-10-29 03:47:42,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:47:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2020-10-29 03:47:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1640. [2020-10-29 03:47:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-10-29 03:47:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2314 transitions. [2020-10-29 03:47:42,972 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2314 transitions. Word has length 77 [2020-10-29 03:47:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:42,972 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2314 transitions. [2020-10-29 03:47:42,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:47:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2314 transitions. [2020-10-29 03:47:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 03:47:42,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:42,977 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:42,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:47:42,978 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1924689102, now seen corresponding path program 6 times [2020-10-29 03:47:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:42,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357830588] [2020-10-29 03:47:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:43,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:43,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 03:47:48,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:47:48,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:48,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:47:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 03:47:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:47:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:48,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:48,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:48,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:48,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-29 03:47:48,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357830588] [2020-10-29 03:47:48,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:48,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:47:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189895229] [2020-10-29 03:47:48,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:47:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:47:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:47:48,180 INFO L87 Difference]: Start difference. First operand 1640 states and 2314 transitions. Second operand 10 states. [2020-10-29 03:47:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:48,630 INFO L93 Difference]: Finished difference Result 3699 states and 5243 transitions. [2020-10-29 03:47:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:47:48,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-29 03:47:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:48,641 INFO L225 Difference]: With dead ends: 3699 [2020-10-29 03:47:48,642 INFO L226 Difference]: Without dead ends: 2078 [2020-10-29 03:47:48,646 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 [2020-10-29 03:47:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-10-29 03:47:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1668. [2020-10-29 03:47:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1668 states. [2020-10-29 03:47:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2342 transitions. [2020-10-29 03:47:48,731 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2342 transitions. Word has length 89 [2020-10-29 03:47:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:48,731 INFO L481 AbstractCegarLoop]: Abstraction has 1668 states and 2342 transitions. [2020-10-29 03:47:48,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:47:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2342 transitions. [2020-10-29 03:47:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 03:47:48,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:48,737 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:48,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:47:48,737 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash -306760589, now seen corresponding path program 7 times [2020-10-29 03:47:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:48,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643347325] [2020-10-29 03:47:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:48,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:53,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:47:53,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:53,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:53,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:53,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:53,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:47:53,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:53,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:53,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-29 03:47:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643347325] [2020-10-29 03:47:53,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:53,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:47:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513077846] [2020-10-29 03:47:53,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:47:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:47:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:47:53,963 INFO L87 Difference]: Start difference. First operand 1668 states and 2342 transitions. Second operand 11 states. [2020-10-29 03:47:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:47:54,485 INFO L93 Difference]: Finished difference Result 3880 states and 5486 transitions. [2020-10-29 03:47:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:47:54,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-29 03:47:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:47:54,496 INFO L225 Difference]: With dead ends: 3880 [2020-10-29 03:47:54,496 INFO L226 Difference]: Without dead ends: 2233 [2020-10-29 03:47:54,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:47:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2020-10-29 03:47:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1815. [2020-10-29 03:47:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1815 states. [2020-10-29 03:47:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2538 transitions. [2020-10-29 03:47:54,585 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2538 transitions. Word has length 101 [2020-10-29 03:47:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:47:54,585 INFO L481 AbstractCegarLoop]: Abstraction has 1815 states and 2538 transitions. [2020-10-29 03:47:54,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:47:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2538 transitions. [2020-10-29 03:47:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-29 03:47:54,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:47:54,591 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:47:54,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:47:54,591 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:47:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:47:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash 246164878, now seen corresponding path program 8 times [2020-10-29 03:47:54,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:47:54,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927259471] [2020-10-29 03:47:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:47:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:54,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:54,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:54,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:59,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:59,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-29 03:47:59,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:47:59,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:47:59,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:47:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:47:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:47:59,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:47:59,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:47:59,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:47:59,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:47:59,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:47:59,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:47:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:47:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:47:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:47:59,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:47:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-29 03:47:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927259471] [2020-10-29 03:47:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:47:59,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:47:59,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347080353] [2020-10-29 03:47:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:47:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:47:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:47:59,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:47:59,854 INFO L87 Difference]: Start difference. First operand 1815 states and 2538 transitions. Second operand 12 states. [2020-10-29 03:48:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:00,401 INFO L93 Difference]: Finished difference Result 4218 states and 5950 transitions. [2020-10-29 03:48:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:48:00,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-29 03:48:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:00,413 INFO L225 Difference]: With dead ends: 4218 [2020-10-29 03:48:00,413 INFO L226 Difference]: Without dead ends: 2426 [2020-10-29 03:48:00,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:48:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2020-10-29 03:48:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1942. [2020-10-29 03:48:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1942 states. [2020-10-29 03:48:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2710 transitions. [2020-10-29 03:48:00,510 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2710 transitions. Word has length 113 [2020-10-29 03:48:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:00,510 INFO L481 AbstractCegarLoop]: Abstraction has 1942 states and 2710 transitions. [2020-10-29 03:48:00,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:48:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2710 transitions. [2020-10-29 03:48:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 03:48:00,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:00,517 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:00,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:48:00,517 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash -553435439, now seen corresponding path program 9 times [2020-10-29 03:48:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714499689] [2020-10-29 03:48:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-29 03:48:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:48:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:05,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:05,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-29 03:48:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714499689] [2020-10-29 03:48:05,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:05,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:48:05,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991661667] [2020-10-29 03:48:05,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:48:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:05,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:48:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:48:05,821 INFO L87 Difference]: Start difference. First operand 1942 states and 2710 transitions. Second operand 13 states. [2020-10-29 03:48:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:06,377 INFO L93 Difference]: Finished difference Result 4482 states and 6312 transitions. [2020-10-29 03:48:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:48:06,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-29 03:48:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:06,390 INFO L225 Difference]: With dead ends: 4482 [2020-10-29 03:48:06,390 INFO L226 Difference]: Without dead ends: 2565 [2020-10-29 03:48:06,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:48:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2020-10-29 03:48:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2037. [2020-10-29 03:48:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2037 states. [2020-10-29 03:48:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 2842 transitions. [2020-10-29 03:48:06,492 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 2842 transitions. Word has length 125 [2020-10-29 03:48:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:06,493 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 2842 transitions. [2020-10-29 03:48:06,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:48:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 2842 transitions. [2020-10-29 03:48:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 03:48:06,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:06,499 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:06,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:48:06,499 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash 152328106, now seen corresponding path program 10 times [2020-10-29 03:48:06,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:06,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103831315] [2020-10-29 03:48:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:06,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:48:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 03:48:11,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:48:11,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:11,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:11,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:11,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:11,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:11,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 176 proven. 159 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-29 03:48:11,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103831315] [2020-10-29 03:48:11,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:11,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:48:11,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098729427] [2020-10-29 03:48:11,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:48:11,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:11,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:48:11,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:48:11,994 INFO L87 Difference]: Start difference. First operand 2037 states and 2842 transitions. Second operand 15 states. [2020-10-29 03:48:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:14,409 INFO L93 Difference]: Finished difference Result 2471 states and 3445 transitions. [2020-10-29 03:48:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:48:14,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 137 [2020-10-29 03:48:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:14,420 INFO L225 Difference]: With dead ends: 2471 [2020-10-29 03:48:14,420 INFO L226 Difference]: Without dead ends: 2407 [2020-10-29 03:48:14,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:48:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2020-10-29 03:48:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2283. [2020-10-29 03:48:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-10-29 03:48:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3182 transitions. [2020-10-29 03:48:14,523 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3182 transitions. Word has length 137 [2020-10-29 03:48:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:14,523 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3182 transitions. [2020-10-29 03:48:14,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:48:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3182 transitions. [2020-10-29 03:48:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 03:48:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:14,530 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:14,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:48:14,531 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash -200760276, now seen corresponding path program 11 times [2020-10-29 03:48:14,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:14,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998466932] [2020-10-29 03:48:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:14,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:19,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:19,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-29 03:48:19,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:19,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:48:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:19,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:19,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:19,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:19,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:19,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:48:19,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:19,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:19,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-29 03:48:19,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998466932] [2020-10-29 03:48:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:48:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089969047] [2020-10-29 03:48:19,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:48:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:48:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:48:19,858 INFO L87 Difference]: Start difference. First operand 2283 states and 3182 transitions. Second operand 14 states. [2020-10-29 03:48:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:20,485 INFO L93 Difference]: Finished difference Result 5182 states and 7286 transitions. [2020-10-29 03:48:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:48:20,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-29 03:48:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:20,498 INFO L225 Difference]: With dead ends: 5182 [2020-10-29 03:48:20,499 INFO L226 Difference]: Without dead ends: 2926 [2020-10-29 03:48:20,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:48:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2020-10-29 03:48:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2390. [2020-10-29 03:48:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2020-10-29 03:48:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3330 transitions. [2020-10-29 03:48:20,616 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3330 transitions. Word has length 137 [2020-10-29 03:48:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:20,616 INFO L481 AbstractCegarLoop]: Abstraction has 2390 states and 3330 transitions. [2020-10-29 03:48:20,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:48:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3330 transitions. [2020-10-29 03:48:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-29 03:48:20,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:20,623 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 7, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:20,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:48:20,623 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1462914155, now seen corresponding path program 12 times [2020-10-29 03:48:20,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:20,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271932637] [2020-10-29 03:48:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:25,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:25,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:48:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 03:48:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:48:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:25,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:25,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:25,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:25,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:25,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-29 03:48:26,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271932637] [2020-10-29 03:48:26,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:26,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:48:26,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467922735] [2020-10-29 03:48:26,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:48:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:48:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:48:26,007 INFO L87 Difference]: Start difference. First operand 2390 states and 3330 transitions. Second operand 15 states. [2020-10-29 03:48:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:26,678 INFO L93 Difference]: Finished difference Result 5394 states and 7580 transitions. [2020-10-29 03:48:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:48:26,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-29 03:48:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:26,694 INFO L225 Difference]: With dead ends: 5394 [2020-10-29 03:48:26,694 INFO L226 Difference]: Without dead ends: 3033 [2020-10-29 03:48:26,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:48:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2020-10-29 03:48:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2497. [2020-10-29 03:48:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2497 states. [2020-10-29 03:48:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3478 transitions. [2020-10-29 03:48:26,818 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3478 transitions. Word has length 149 [2020-10-29 03:48:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:26,819 INFO L481 AbstractCegarLoop]: Abstraction has 2497 states and 3478 transitions. [2020-10-29 03:48:26,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:48:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3478 transitions. [2020-10-29 03:48:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-29 03:48:26,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:26,827 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 8, 7, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:26,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:48:26,827 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:26,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1464365256, now seen corresponding path program 13 times [2020-10-29 03:48:26,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:26,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666374912] [2020-10-29 03:48:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:26,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:26,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:27,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:27,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:48:31,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 03:48:31,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:48:31,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:32,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:32,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:32,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-29 03:48:32,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666374912] [2020-10-29 03:48:32,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:32,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:48:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286499726] [2020-10-29 03:48:32,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:48:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:48:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:48:32,254 INFO L87 Difference]: Start difference. First operand 2497 states and 3478 transitions. Second operand 16 states. [2020-10-29 03:48:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:32,958 INFO L93 Difference]: Finished difference Result 5606 states and 7874 transitions. [2020-10-29 03:48:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:48:32,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-29 03:48:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:32,970 INFO L225 Difference]: With dead ends: 5606 [2020-10-29 03:48:32,970 INFO L226 Difference]: Without dead ends: 3140 [2020-10-29 03:48:32,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:48:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2020-10-29 03:48:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2604. [2020-10-29 03:48:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2604 states. [2020-10-29 03:48:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3626 transitions. [2020-10-29 03:48:33,099 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3626 transitions. Word has length 161 [2020-10-29 03:48:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:33,099 INFO L481 AbstractCegarLoop]: Abstraction has 2604 states and 3626 transitions. [2020-10-29 03:48:33,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:48:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3626 transitions. [2020-10-29 03:48:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-29 03:48:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:33,107 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:33,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:48:33,108 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1571170745, now seen corresponding path program 14 times [2020-10-29 03:48:33,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:33,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436939022] [2020-10-29 03:48:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:33,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:38,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:38,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 03:48:38,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:38,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:48:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:38,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:38,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-29 03:48:38,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436939022] [2020-10-29 03:48:38,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:38,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:48:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133130771] [2020-10-29 03:48:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:48:38,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:48:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:48:38,537 INFO L87 Difference]: Start difference. First operand 2604 states and 3626 transitions. Second operand 17 states. [2020-10-29 03:48:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:39,313 INFO L93 Difference]: Finished difference Result 5818 states and 8168 transitions. [2020-10-29 03:48:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:48:39,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2020-10-29 03:48:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:39,322 INFO L225 Difference]: With dead ends: 5818 [2020-10-29 03:48:39,323 INFO L226 Difference]: Without dead ends: 3247 [2020-10-29 03:48:39,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:48:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-10-29 03:48:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2711. [2020-10-29 03:48:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-10-29 03:48:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3774 transitions. [2020-10-29 03:48:39,483 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3774 transitions. Word has length 173 [2020-10-29 03:48:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:39,483 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 3774 transitions. [2020-10-29 03:48:39,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:48:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3774 transitions. [2020-10-29 03:48:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-29 03:48:39,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:39,491 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 10, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:39,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:48:39,491 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1117910172, now seen corresponding path program 15 times [2020-10-29 03:48:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:39,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69798423] [2020-10-29 03:48:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:39,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:39,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:44,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:48:44,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:44,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:44,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:44,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:44,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-29 03:48:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69798423] [2020-10-29 03:48:44,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:44,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:48:44,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506586614] [2020-10-29 03:48:44,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:48:44,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:48:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:48:44,976 INFO L87 Difference]: Start difference. First operand 2711 states and 3774 transitions. Second operand 18 states. [2020-10-29 03:48:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:45,787 INFO L93 Difference]: Finished difference Result 6030 states and 8462 transitions. [2020-10-29 03:48:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:48:45,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 185 [2020-10-29 03:48:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:45,794 INFO L225 Difference]: With dead ends: 6030 [2020-10-29 03:48:45,794 INFO L226 Difference]: Without dead ends: 3354 [2020-10-29 03:48:45,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:48:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2020-10-29 03:48:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2818. [2020-10-29 03:48:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2818 states. [2020-10-29 03:48:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3922 transitions. [2020-10-29 03:48:45,937 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3922 transitions. Word has length 185 [2020-10-29 03:48:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:45,938 INFO L481 AbstractCegarLoop]: Abstraction has 2818 states and 3922 transitions. [2020-10-29 03:48:45,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:48:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3922 transitions. [2020-10-29 03:48:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-29 03:48:45,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:45,946 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 11, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:45,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:48:45,947 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1042071075, now seen corresponding path program 16 times [2020-10-29 03:48:45,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:45,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230249143] [2020-10-29 03:48:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:46,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:50,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:48:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:51,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:51,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:51,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:51,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-29 03:48:51,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230249143] [2020-10-29 03:48:51,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:51,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:48:51,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675724452] [2020-10-29 03:48:51,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:48:51,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:48:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:48:51,603 INFO L87 Difference]: Start difference. First operand 2818 states and 3922 transitions. Second operand 19 states. [2020-10-29 03:48:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:52,424 INFO L93 Difference]: Finished difference Result 6242 states and 8756 transitions. [2020-10-29 03:48:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:48:52,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 197 [2020-10-29 03:48:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:52,432 INFO L225 Difference]: With dead ends: 6242 [2020-10-29 03:48:52,432 INFO L226 Difference]: Without dead ends: 3461 [2020-10-29 03:48:52,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:48:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2020-10-29 03:48:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2925. [2020-10-29 03:48:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2020-10-29 03:48:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4070 transitions. [2020-10-29 03:48:52,605 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4070 transitions. Word has length 197 [2020-10-29 03:48:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:52,605 INFO L481 AbstractCegarLoop]: Abstraction has 2925 states and 4070 transitions. [2020-10-29 03:48:52,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:48:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4070 transitions. [2020-10-29 03:48:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-29 03:48:52,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:52,619 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 13, 12, 9, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:52,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:48:52,620 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash -427002880, now seen corresponding path program 17 times [2020-10-29 03:48:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:52,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822508961] [2020-10-29 03:48:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:52,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:57,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:57,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-29 03:48:57,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:48:57,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:48:57,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:57,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:48:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 03:48:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:48:57,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:58,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:48:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:48:58,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:48:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:48:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:48:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:48:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:48:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2020-10-29 03:48:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822508961] [2020-10-29 03:48:58,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:48:58,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:48:58,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668967457] [2020-10-29 03:48:58,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:48:58,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:48:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:48:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:48:58,245 INFO L87 Difference]: Start difference. First operand 2925 states and 4070 transitions. Second operand 20 states. [2020-10-29 03:48:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:48:59,072 INFO L93 Difference]: Finished difference Result 6454 states and 9050 transitions. [2020-10-29 03:48:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:48:59,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 209 [2020-10-29 03:48:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:48:59,083 INFO L225 Difference]: With dead ends: 6454 [2020-10-29 03:48:59,083 INFO L226 Difference]: Without dead ends: 3568 [2020-10-29 03:48:59,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:48:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2020-10-29 03:48:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3032. [2020-10-29 03:48:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3032 states. [2020-10-29 03:48:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4218 transitions. [2020-10-29 03:48:59,271 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4218 transitions. Word has length 209 [2020-10-29 03:48:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:48:59,271 INFO L481 AbstractCegarLoop]: Abstraction has 3032 states and 4218 transitions. [2020-10-29 03:48:59,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:48:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4218 transitions. [2020-10-29 03:48:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-29 03:48:59,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:48:59,287 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 14, 13, 10, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:48:59,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:48:59,287 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:48:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:48:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -773716993, now seen corresponding path program 18 times [2020-10-29 03:48:59,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:48:59,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786416668] [2020-10-29 03:48:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:48:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:48:59,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:48:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:49:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-29 03:49:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 03:49:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:49:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:04,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:49:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:49:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:49:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-10-29 03:49:04,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786416668] [2020-10-29 03:49:04,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:49:04,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:49:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948751618] [2020-10-29 03:49:04,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:49:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:49:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:49:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:49:04,858 INFO L87 Difference]: Start difference. First operand 3032 states and 4218 transitions. Second operand 21 states. [2020-10-29 03:49:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:49:05,817 INFO L93 Difference]: Finished difference Result 6666 states and 9344 transitions. [2020-10-29 03:49:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:49:05,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 221 [2020-10-29 03:49:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:49:05,826 INFO L225 Difference]: With dead ends: 6666 [2020-10-29 03:49:05,826 INFO L226 Difference]: Without dead ends: 3675 [2020-10-29 03:49:05,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:49:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-10-29 03:49:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3139. [2020-10-29 03:49:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3139 states. [2020-10-29 03:49:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4366 transitions. [2020-10-29 03:49:06,020 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4366 transitions. Word has length 221 [2020-10-29 03:49:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:49:06,020 INFO L481 AbstractCegarLoop]: Abstraction has 3139 states and 4366 transitions. [2020-10-29 03:49:06,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:49:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4366 transitions. [2020-10-29 03:49:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-29 03:49:06,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:49:06,032 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 15, 14, 11, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:49:06,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:49:06,032 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:49:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:49:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -367613284, now seen corresponding path program 19 times [2020-10-29 03:49:06,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:49:06,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925475833] [2020-10-29 03:49:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:49:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:06,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:06,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:11,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:49:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 03:49:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:49:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:49:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:11,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:49:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:49:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:49:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2020-10-29 03:49:11,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925475833] [2020-10-29 03:49:11,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:49:11,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:49:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709664640] [2020-10-29 03:49:11,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:49:11,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:49:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:49:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:49:11,774 INFO L87 Difference]: Start difference. First operand 3139 states and 4366 transitions. Second operand 22 states. [2020-10-29 03:49:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:49:12,774 INFO L93 Difference]: Finished difference Result 6878 states and 9638 transitions. [2020-10-29 03:49:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:49:12,776 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 233 [2020-10-29 03:49:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:49:12,785 INFO L225 Difference]: With dead ends: 6878 [2020-10-29 03:49:12,785 INFO L226 Difference]: Without dead ends: 3782 [2020-10-29 03:49:12,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:49:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2020-10-29 03:49:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3246. [2020-10-29 03:49:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-29 03:49:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4514 transitions. [2020-10-29 03:49:12,986 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4514 transitions. Word has length 233 [2020-10-29 03:49:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:49:12,986 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4514 transitions. [2020-10-29 03:49:12,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:49:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4514 transitions. [2020-10-29 03:49:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-29 03:49:12,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:49:12,997 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 16, 15, 12, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:49:12,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:49:12,997 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:49:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:49:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1024501723, now seen corresponding path program 20 times [2020-10-29 03:49:12,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:49:12,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221613011] [2020-10-29 03:49:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:49:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:18,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:18,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-29 03:49:18,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 03:49:18,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:18,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:49:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:18,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:18,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:49:18,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:49:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:49:18,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2020-10-29 03:49:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221613011] [2020-10-29 03:49:18,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:49:18,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:49:18,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347039306] [2020-10-29 03:49:18,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:49:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:49:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:49:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:49:18,751 INFO L87 Difference]: Start difference. First operand 3246 states and 4514 transitions. Second operand 23 states. [2020-10-29 03:49:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:49:19,844 INFO L93 Difference]: Finished difference Result 7090 states and 9932 transitions. [2020-10-29 03:49:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:49:19,846 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 245 [2020-10-29 03:49:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:49:19,852 INFO L225 Difference]: With dead ends: 7090 [2020-10-29 03:49:19,852 INFO L226 Difference]: Without dead ends: 3889 [2020-10-29 03:49:19,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:49:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2020-10-29 03:49:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3353. [2020-10-29 03:49:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3353 states. [2020-10-29 03:49:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4662 transitions. [2020-10-29 03:49:20,054 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4662 transitions. Word has length 245 [2020-10-29 03:49:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:49:20,055 INFO L481 AbstractCegarLoop]: Abstraction has 3353 states and 4662 transitions. [2020-10-29 03:49:20,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:49:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4662 transitions. [2020-10-29 03:49:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-29 03:49:20,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:49:20,064 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 17, 16, 13, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:49:20,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:49:20,064 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:49:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:49:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1447014200, now seen corresponding path program 21 times [2020-10-29 03:49:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:49:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088247688] [2020-10-29 03:49:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:49:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:25,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:25,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-29 03:49:25,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:49:25,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 03:49:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:25,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:49:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:25,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:25,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:25,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:49:25,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:49:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:49:25,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:25,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:25,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:49:25,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:49:25,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:49:25,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2020-10-29 03:49:25,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088247688] [2020-10-29 03:49:25,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:49:25,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:49:25,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725947587] [2020-10-29 03:49:25,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:49:25,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:49:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:49:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:49:25,950 INFO L87 Difference]: Start difference. First operand 3353 states and 4662 transitions. Second operand 24 states. [2020-10-29 03:49:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:49:27,063 INFO L93 Difference]: Finished difference Result 7302 states and 10226 transitions. [2020-10-29 03:49:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:49:27,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 257 [2020-10-29 03:49:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:49:27,071 INFO L225 Difference]: With dead ends: 7302 [2020-10-29 03:49:27,071 INFO L226 Difference]: Without dead ends: 3996 [2020-10-29 03:49:27,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:49:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2020-10-29 03:49:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3460. [2020-10-29 03:49:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3460 states. [2020-10-29 03:49:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4810 transitions. [2020-10-29 03:49:27,287 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4810 transitions. Word has length 257 [2020-10-29 03:49:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:49:27,288 INFO L481 AbstractCegarLoop]: Abstraction has 3460 states and 4810 transitions. [2020-10-29 03:49:27,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:49:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4810 transitions. [2020-10-29 03:49:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-29 03:49:27,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:49:27,296 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 18, 17, 14, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:49:27,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:49:27,297 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:49:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:49:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash -149968457, now seen corresponding path program 22 times [2020-10-29 03:49:27,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:49:27,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039570710] [2020-10-29 03:49:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:49:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:27,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:32,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:49:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 03:49:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 03:49:32,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:33,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:49:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:49:33,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:49:33,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:49:33,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:49:33,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:49:33,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:49:33,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:49:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-29 03:49:33,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039570710] [2020-10-29 03:49:33,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:49:33,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:49:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725252463] [2020-10-29 03:49:33,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:49:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:49:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:49:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:49:33,180 INFO L87 Difference]: Start difference. First operand 3460 states and 4810 transitions. Second operand 25 states.