/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:37:10,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:37:10,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:37:10,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:37:10,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:37:10,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:37:10,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:37:10,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:37:10,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:37:10,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:37:10,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:37:10,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:37:10,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:37:10,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:37:10,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:37:10,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:37:10,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:37:10,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:37:10,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:37:10,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:37:10,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:37:10,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:37:10,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:37:10,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:37:10,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:37:10,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:37:10,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:37:10,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:37:10,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:37:10,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:37:10,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:37:10,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:37:10,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:37:10,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:37:10,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:37:10,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:37:10,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:37:10,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:37:10,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:37:10,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:37:10,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:37:10,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:37:10,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:37:10,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:37:10,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:37:10,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:37:10,512 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:37:10,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:37:10,513 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:37:10,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:37:10,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:37:10,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:37:10,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:37:10,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:37:10,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:37:10,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:37:10,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:37:10,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:37:10,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:37:10,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:37:10,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:37:10,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:37:10,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:37:10,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:37:10,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:37:10,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:37:10,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:37:10,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:37:10,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:37:10,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:37:10,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:37:10,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:37:10,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:37:10,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:37:10,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:37:10,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:37:10,989 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:37:10,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label13.c [2020-10-26 23:37:11,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ddd49132/c9c6758ba75e40f4a0c8f0272801f086/FLAG3e46a811c [2020-10-26 23:37:11,937 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:37:11,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label13.c [2020-10-26 23:37:11,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ddd49132/c9c6758ba75e40f4a0c8f0272801f086/FLAG3e46a811c [2020-10-26 23:37:12,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ddd49132/c9c6758ba75e40f4a0c8f0272801f086 [2020-10-26 23:37:12,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:37:12,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:37:12,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:37:12,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:37:12,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:37:12,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:37:12" (1/1) ... [2020-10-26 23:37:12,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af74e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:12, skipping insertion in model container [2020-10-26 23:37:12,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:37:12" (1/1) ... [2020-10-26 23:37:12,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:37:12,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:37:13,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:37:13,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:37:13,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:37:13,575 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:37:13,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13 WrapperNode [2020-10-26 23:37:13,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:37:13,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:37:13,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:37:13,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:37:13,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... [2020-10-26 23:37:13,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:37:13,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:37:13,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:37:13,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:37:13,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:37:13,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:37:13,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:37:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:37:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:37:13,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:37:13,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:37:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:37:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:37:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:37:13,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:37:13,905 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:37:13,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:37:13,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:37:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:37:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:37:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:37:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:37:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:37:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:37:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:37:13,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:37:17,307 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:37:17,307 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:37:17,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:37:17 BoogieIcfgContainer [2020-10-26 23:37:17,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:37:17,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:37:17,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:37:17,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:37:17,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:37:12" (1/3) ... [2020-10-26 23:37:17,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab3273f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:37:17, skipping insertion in model container [2020-10-26 23:37:17,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:13" (2/3) ... [2020-10-26 23:37:17,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab3273f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:37:17, skipping insertion in model container [2020-10-26 23:37:17,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:37:17" (3/3) ... [2020-10-26 23:37:17,319 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label13.c [2020-10-26 23:37:17,331 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:37:17,336 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:37:17,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:37:17,380 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:37:17,380 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:37:17,381 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:37:17,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:37:17,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:37:17,381 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:37:17,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:37:17,381 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:37:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:37:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 23:37:17,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:17,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:17,418 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1460813753, now seen corresponding path program 1 times [2020-10-26 23:37:17,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:17,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532325877] [2020-10-26 23:37:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:17,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:18,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:18,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 23:37:18,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:18,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-26 23:37:18,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 23:37:18,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:37:18,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:18,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:18,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:18,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:18,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:18,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 23:37:18,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:37:18,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532325877] [2020-10-26 23:37:18,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:18,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:37:18,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952473213] [2020-10-26 23:37:18,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:37:18,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:37:18,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:37:18,456 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:37:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:27,005 INFO L93 Difference]: Finished difference Result 1245 states and 2226 transitions. [2020-10-26 23:37:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:37:27,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-26 23:37:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:27,030 INFO L225 Difference]: With dead ends: 1245 [2020-10-26 23:37:27,030 INFO L226 Difference]: Without dead ends: 725 [2020-10-26 23:37:27,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:37:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-26 23:37:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2020-10-26 23:37:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-26 23:37:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1130 transitions. [2020-10-26 23:37:27,180 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1130 transitions. Word has length 55 [2020-10-26 23:37:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:27,183 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1130 transitions. [2020-10-26 23:37:27,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:37:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1130 transitions. [2020-10-26 23:37:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 23:37:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:27,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:27,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:37:27,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 517092563, now seen corresponding path program 1 times [2020-10-26 23:37:27,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:27,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769608031] [2020-10-26 23:37:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:29,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:29,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 23:37:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:37:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2505 [2020-10-26 23:37:29,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:29,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:37:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:37:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:29,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:29,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:29,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:29,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:37:29,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:29,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:29,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:29,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:37:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:30,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:30,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:30,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:37:30,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 23:37:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:37:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:37:30,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769608031] [2020-10-26 23:37:30,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:30,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:37:30,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594333300] [2020-10-26 23:37:30,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:30,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:30,367 INFO L87 Difference]: Start difference. First operand 713 states and 1130 transitions. Second operand 7 states. [2020-10-26 23:37:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:42,053 INFO L93 Difference]: Finished difference Result 2091 states and 3342 transitions. [2020-10-26 23:37:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:37:42,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-26 23:37:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:42,066 INFO L225 Difference]: With dead ends: 2091 [2020-10-26 23:37:42,066 INFO L226 Difference]: Without dead ends: 1384 [2020-10-26 23:37:42,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:37:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-10-26 23:37:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1342. [2020-10-26 23:37:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2020-10-26 23:37:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1857 transitions. [2020-10-26 23:37:42,131 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1857 transitions. Word has length 127 [2020-10-26 23:37:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:42,132 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 1857 transitions. [2020-10-26 23:37:42,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1857 transitions. [2020-10-26 23:37:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-26 23:37:42,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:42,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:37:42,135 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1937216355, now seen corresponding path program 1 times [2020-10-26 23:37:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:42,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797862904] [2020-10-26 23:37:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:42,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:43,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:43,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 23:37:43,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:37:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1800 [2020-10-26 23:37:43,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:37:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:44,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:44,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:44,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:44,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:44,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:37:44,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:44,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:44,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:44,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:44,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:44,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:44,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:44,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 23:37:44,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:37:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:37:44,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797862904] [2020-10-26 23:37:44,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:44,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:37:44,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365755796] [2020-10-26 23:37:44,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:44,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:44,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:44,547 INFO L87 Difference]: Start difference. First operand 1342 states and 1857 transitions. Second operand 7 states. [2020-10-26 23:37:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:52,864 INFO L93 Difference]: Finished difference Result 3040 states and 4178 transitions. [2020-10-26 23:37:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:37:52,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-26 23:37:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:52,877 INFO L225 Difference]: With dead ends: 3040 [2020-10-26 23:37:52,877 INFO L226 Difference]: Without dead ends: 1704 [2020-10-26 23:37:52,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:37:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2020-10-26 23:37:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1652. [2020-10-26 23:37:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1652 states. [2020-10-26 23:37:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2177 transitions. [2020-10-26 23:37:52,948 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2177 transitions. Word has length 135 [2020-10-26 23:37:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 2177 transitions. [2020-10-26 23:37:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2177 transitions. [2020-10-26 23:37:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 23:37:52,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:52,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:37:52,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:37:52,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1108695665, now seen corresponding path program 1 times [2020-10-26 23:37:52,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:52,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766263323] [2020-10-26 23:37:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:53,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:55,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:55,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-26 23:37:55,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:37:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2767 [2020-10-26 23:37:55,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:37:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-26 23:37:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:55,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:55,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:37:55,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:55,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:56,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:56,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:37:56,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:37:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 23:37:56,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:56,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:56,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:56,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:37:56,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:56,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:37:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:56,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:56,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:56,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:56,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:56,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 23:37:56,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:56,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:56,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:56,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:37:56,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:37:56,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766263323] [2020-10-26 23:37:56,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:56,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:37:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327263914] [2020-10-26 23:37:56,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:37:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:37:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:37:56,676 INFO L87 Difference]: Start difference. First operand 1652 states and 2177 transitions. Second operand 8 states. [2020-10-26 23:38:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:06,528 INFO L93 Difference]: Finished difference Result 4299 states and 5890 transitions. [2020-10-26 23:38:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:38:06,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 230 [2020-10-26 23:38:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:06,549 INFO L225 Difference]: With dead ends: 4299 [2020-10-26 23:38:06,549 INFO L226 Difference]: Without dead ends: 2960 [2020-10-26 23:38:06,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:38:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2020-10-26 23:38:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2604. [2020-10-26 23:38:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2604 states. [2020-10-26 23:38:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3258 transitions. [2020-10-26 23:38:06,653 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3258 transitions. Word has length 230 [2020-10-26 23:38:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:06,654 INFO L481 AbstractCegarLoop]: Abstraction has 2604 states and 3258 transitions. [2020-10-26 23:38:06,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:38:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3258 transitions. [2020-10-26 23:38:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-26 23:38:06,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:06,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:06,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:38:06,662 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash 948146515, now seen corresponding path program 1 times [2020-10-26 23:38:06,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:06,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979297484] [2020-10-26 23:38:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:08,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:08,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 353 [2020-10-26 23:38:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2056 [2020-10-26 23:38:08,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:38:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:38:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 344 [2020-10-26 23:38:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:08,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:09,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:09,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:09,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:38:09,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:38:09,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:09,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:09,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:38:09,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-26 23:38:09,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:38:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:38:11,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979297484] [2020-10-26 23:38:11,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:11,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:38:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706123641] [2020-10-26 23:38:11,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:38:11,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:38:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:38:11,226 INFO L87 Difference]: Start difference. First operand 2604 states and 3258 transitions. Second operand 6 states. [2020-10-26 23:38:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:16,732 INFO L93 Difference]: Finished difference Result 3270 states and 4049 transitions. [2020-10-26 23:38:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:38:16,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 341 [2020-10-26 23:38:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:16,750 INFO L225 Difference]: With dead ends: 3270 [2020-10-26 23:38:16,751 INFO L226 Difference]: Without dead ends: 3267 [2020-10-26 23:38:16,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:38:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2020-10-26 23:38:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3230. [2020-10-26 23:38:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3230 states. [2020-10-26 23:38:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 3989 transitions. [2020-10-26 23:38:16,846 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 3989 transitions. Word has length 341 [2020-10-26 23:38:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:16,847 INFO L481 AbstractCegarLoop]: Abstraction has 3230 states and 3989 transitions. [2020-10-26 23:38:16,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:38:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 3989 transitions. [2020-10-26 23:38:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-26 23:38:16,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:16,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:16,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:38:16,855 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1675157310, now seen corresponding path program 1 times [2020-10-26 23:38:16,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:16,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191270947] [2020-10-26 23:38:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:17,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:17,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:20,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:20,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 364 [2020-10-26 23:38:20,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:38:20,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3982 [2020-10-26 23:38:20,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:38:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:38:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 355 [2020-10-26 23:38:20,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:38:21,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:38:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:21,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:21,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:38:21,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:21,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 23:38:21,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:21,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:38:21,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:38:21,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:38:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:22,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:22,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:38:22,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-26 23:38:22,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:38:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:38:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 43 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:38:23,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191270947] [2020-10-26 23:38:23,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:23,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:38:23,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312642025] [2020-10-26 23:38:23,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:38:23,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:38:23,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:38:23,240 INFO L87 Difference]: Start difference. First operand 3230 states and 3989 transitions. Second operand 12 states. [2020-10-26 23:38:23,483 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-26 23:38:24,116 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-26 23:38:24,566 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-26 23:38:25,367 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-26 23:38:26,383 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-26 23:38:27,256 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-26 23:38:28,034 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-26 23:38:28,433 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-26 23:38:28,837 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-26 23:38:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:38,058 INFO L93 Difference]: Finished difference Result 5531 states and 7393 transitions. [2020-10-26 23:38:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 23:38:38,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 350 [2020-10-26 23:38:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:38,083 INFO L225 Difference]: With dead ends: 5531 [2020-10-26 23:38:38,084 INFO L226 Difference]: Without dead ends: 4180 [2020-10-26 23:38:38,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 23:38:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2020-10-26 23:38:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 3561. [2020-10-26 23:38:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3561 states. [2020-10-26 23:38:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4582 transitions. [2020-10-26 23:38:38,210 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4582 transitions. Word has length 350 [2020-10-26 23:38:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:38,211 INFO L481 AbstractCegarLoop]: Abstraction has 3561 states and 4582 transitions. [2020-10-26 23:38:38,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:38:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4582 transitions. [2020-10-26 23:38:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-10-26 23:38:38,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:38,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:38,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:38:38,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 281952498, now seen corresponding path program 1 times [2020-10-26 23:38:38,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:38,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342973630] [2020-10-26 23:38:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:40,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:40,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:40,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-10-26 23:38:40,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:38:40,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2408 [2020-10-26 23:38:40,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:38:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:38:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-26 23:38:40,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:40,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:40,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:40,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:40,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:41,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:41,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:41,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:38:41,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:38:41,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:41,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:38:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:41,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:41,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:41,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:38:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 152 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:38:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342973630] [2020-10-26 23:38:42,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:38:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867333118] [2020-10-26 23:38:42,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:38:42,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:38:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:38:42,180 INFO L87 Difference]: Start difference. First operand 3561 states and 4582 transitions. Second operand 6 states. [2020-10-26 23:38:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:51,233 INFO L93 Difference]: Finished difference Result 8418 states and 11399 transitions. [2020-10-26 23:38:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:38:51,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 451 [2020-10-26 23:38:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:51,268 INFO L225 Difference]: With dead ends: 8418 [2020-10-26 23:38:51,269 INFO L226 Difference]: Without dead ends: 5170 [2020-10-26 23:38:51,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:38:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2020-10-26 23:38:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 5145. [2020-10-26 23:38:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5145 states. [2020-10-26 23:38:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 6562 transitions. [2020-10-26 23:38:51,444 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 6562 transitions. Word has length 451 [2020-10-26 23:38:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:51,445 INFO L481 AbstractCegarLoop]: Abstraction has 5145 states and 6562 transitions. [2020-10-26 23:38:51,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:38:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 6562 transitions. [2020-10-26 23:38:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-10-26 23:38:51,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:51,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:38:51,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:38:51,458 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 547034013, now seen corresponding path program 1 times [2020-10-26 23:38:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548755304] [2020-10-26 23:38:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:51,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:53,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:56,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:56,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 476 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 315 [2020-10-26 23:38:56,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:56,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:56,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:56,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:56,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:56,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:56,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:38:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:38:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:56,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:57,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:57,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:38:57,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:38:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:57,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:38:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 325 proven. 109 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 23:38:57,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548755304] [2020-10-26 23:38:57,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:57,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:38:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751530062] [2020-10-26 23:38:57,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:38:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:38:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:38:57,945 INFO L87 Difference]: Start difference. First operand 5145 states and 6562 transitions. Second operand 8 states. [2020-10-26 23:39:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:12,070 INFO L93 Difference]: Finished difference Result 12011 states and 16775 transitions. [2020-10-26 23:39:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:39:12,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 460 [2020-10-26 23:39:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:12,119 INFO L225 Difference]: With dead ends: 12011 [2020-10-26 23:39:12,119 INFO L226 Difference]: Without dead ends: 7792 [2020-10-26 23:39:12,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:39:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7792 states. [2020-10-26 23:39:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7792 to 6795. [2020-10-26 23:39:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6795 states. [2020-10-26 23:39:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6795 states to 6795 states and 8597 transitions. [2020-10-26 23:39:12,377 INFO L78 Accepts]: Start accepts. Automaton has 6795 states and 8597 transitions. Word has length 460 [2020-10-26 23:39:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:12,378 INFO L481 AbstractCegarLoop]: Abstraction has 6795 states and 8597 transitions. [2020-10-26 23:39:12,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:39:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6795 states and 8597 transitions. [2020-10-26 23:39:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2020-10-26 23:39:12,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:12,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:12,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:39:12,395 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1004277606, now seen corresponding path program 1 times [2020-10-26 23:39:12,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:12,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955310771] [2020-10-26 23:39:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:16,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 538 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4312 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:39:16,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:16,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:16,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:39:17,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 23:39:17,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:39:17,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:39:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:39:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2020-10-26 23:39:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-26 23:39:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:17,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 253 proven. 81 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-26 23:39:18,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955310771] [2020-10-26 23:39:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061923024] [2020-10-26 23:39:18,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:18,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:18,031 INFO L87 Difference]: Start difference. First operand 6795 states and 8597 transitions. Second operand 7 states. [2020-10-26 23:39:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:30,498 INFO L93 Difference]: Finished difference Result 15274 states and 19324 transitions. [2020-10-26 23:39:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:39:30,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 522 [2020-10-26 23:39:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:30,529 INFO L225 Difference]: With dead ends: 15274 [2020-10-26 23:39:30,529 INFO L226 Difference]: Without dead ends: 8792 [2020-10-26 23:39:30,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:39:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8792 states. [2020-10-26 23:39:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8792 to 8096. [2020-10-26 23:39:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8096 states. [2020-10-26 23:39:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 9999 transitions. [2020-10-26 23:39:30,769 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 9999 transitions. Word has length 522 [2020-10-26 23:39:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:30,771 INFO L481 AbstractCegarLoop]: Abstraction has 8096 states and 9999 transitions. [2020-10-26 23:39:30,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 9999 transitions. [2020-10-26 23:39:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-10-26 23:39:30,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:30,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:30,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:39:30,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1203916178, now seen corresponding path program 1 times [2020-10-26 23:39:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:30,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611149059] [2020-10-26 23:39:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:32,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:34,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 550 [2020-10-26 23:39:34,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:39:34,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3095 [2020-10-26 23:39:34,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:39:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 23:39:34,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:34,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:34,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:34,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:34,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:34,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:34,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:34,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:39:34,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:34,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:39:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:34,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:34,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:39:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:39:34,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611149059] [2020-10-26 23:39:34,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:34,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:34,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978709109] [2020-10-26 23:39:34,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:34,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:34,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:34,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:34,950 INFO L87 Difference]: Start difference. First operand 8096 states and 9999 transitions. Second operand 7 states. [2020-10-26 23:39:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:44,739 INFO L93 Difference]: Finished difference Result 18465 states and 23781 transitions. [2020-10-26 23:39:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:39:44,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 534 [2020-10-26 23:39:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:44,781 INFO L225 Difference]: With dead ends: 18465 [2020-10-26 23:39:44,782 INFO L226 Difference]: Without dead ends: 10682 [2020-10-26 23:39:44,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:39:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10682 states. [2020-10-26 23:39:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10682 to 10025. [2020-10-26 23:39:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10025 states. [2020-10-26 23:39:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 12265 transitions. [2020-10-26 23:39:45,081 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 12265 transitions. Word has length 534 [2020-10-26 23:39:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:45,082 INFO L481 AbstractCegarLoop]: Abstraction has 10025 states and 12265 transitions. [2020-10-26 23:39:45,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 12265 transitions. [2020-10-26 23:39:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-10-26 23:39:45,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:45,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:45,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:39:45,099 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1343678577, now seen corresponding path program 1 times [2020-10-26 23:39:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:45,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915548108] [2020-10-26 23:39:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:47,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:47,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 622 [2020-10-26 23:39:47,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:47,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2436 [2020-10-26 23:39:47,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:39:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-26 23:39:47,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:47,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:47,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:47,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 23:39:47,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:48,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:39:48,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:48,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:39:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:48,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:48,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-26 23:39:48,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 405 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:39:48,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915548108] [2020-10-26 23:39:48,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:48,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:48,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043815757] [2020-10-26 23:39:48,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:48,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:48,713 INFO L87 Difference]: Start difference. First operand 10025 states and 12265 transitions. Second operand 7 states. [2020-10-26 23:40:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:01,257 INFO L93 Difference]: Finished difference Result 20371 states and 26481 transitions. [2020-10-26 23:40:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:40:01,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 606 [2020-10-26 23:40:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:01,307 INFO L225 Difference]: With dead ends: 20371 [2020-10-26 23:40:01,307 INFO L226 Difference]: Without dead ends: 13456 [2020-10-26 23:40:01,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13456 states. [2020-10-26 23:40:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13456 to 12511. [2020-10-26 23:40:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12511 states. [2020-10-26 23:40:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12511 states to 12511 states and 15700 transitions. [2020-10-26 23:40:01,640 INFO L78 Accepts]: Start accepts. Automaton has 12511 states and 15700 transitions. Word has length 606 [2020-10-26 23:40:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:01,642 INFO L481 AbstractCegarLoop]: Abstraction has 12511 states and 15700 transitions. [2020-10-26 23:40:01,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12511 states and 15700 transitions. [2020-10-26 23:40:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-10-26 23:40:01,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:01,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:01,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:40:01,658 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1003742217, now seen corresponding path program 1 times [2020-10-26 23:40:01,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:01,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883750467] [2020-10-26 23:40:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:02,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:06,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 644 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:40:06,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:40:06,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:07,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:07,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:07,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:40:07,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:40:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:07,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:07,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:40:07,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:40:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:40:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:07,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:07,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:40:07,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-10-26 23:40:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:07,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:07,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:07,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 23:40:07,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:07,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 23:40:07,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-26 23:40:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 377 proven. 82 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-10-26 23:40:07,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883750467] [2020-10-26 23:40:07,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:07,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:07,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765660767] [2020-10-26 23:40:07,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:07,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:07,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:07,960 INFO L87 Difference]: Start difference. First operand 12511 states and 15700 transitions. Second operand 7 states. [2020-10-26 23:40:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:22,088 INFO L93 Difference]: Finished difference Result 28928 states and 38110 transitions. [2020-10-26 23:40:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:40:22,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 626 [2020-10-26 23:40:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:22,148 INFO L225 Difference]: With dead ends: 28928 [2020-10-26 23:40:22,148 INFO L226 Difference]: Without dead ends: 19527 [2020-10-26 23:40:22,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:40:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2020-10-26 23:40:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 18895. [2020-10-26 23:40:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18895 states. [2020-10-26 23:40:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18895 states to 18895 states and 24033 transitions. [2020-10-26 23:40:22,596 INFO L78 Accepts]: Start accepts. Automaton has 18895 states and 24033 transitions. Word has length 626 [2020-10-26 23:40:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:22,597 INFO L481 AbstractCegarLoop]: Abstraction has 18895 states and 24033 transitions. [2020-10-26 23:40:22,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18895 states and 24033 transitions. [2020-10-26 23:40:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-10-26 23:40:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:22,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:22,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:40:22,613 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash 8469020, now seen corresponding path program 1 times [2020-10-26 23:40:22,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:22,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492714399] [2020-10-26 23:40:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:22,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:25,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 654 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-26 23:40:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:27,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:27,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:27,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:27,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:40:27,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:27,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:27,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:28,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:40:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:40:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:40:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:40:28,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:28,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-26 23:40:28,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 23:40:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-10-26 23:40:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 23:40:28,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 23:40:28,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 23:40:28,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 627 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-26 23:40:29,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492714399] [2020-10-26 23:40:29,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:29,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:40:29,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127921331] [2020-10-26 23:40:29,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:29,216 INFO L87 Difference]: Start difference. First operand 18895 states and 24033 transitions. Second operand 8 states. [2020-10-26 23:40:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:48,086 INFO L93 Difference]: Finished difference Result 39812 states and 53993 transitions. [2020-10-26 23:40:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 23:40:48,088 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 636 [2020-10-26 23:40:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:48,173 INFO L225 Difference]: With dead ends: 39812 [2020-10-26 23:40:48,173 INFO L226 Difference]: Without dead ends: 24027 [2020-10-26 23:40:48,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:40:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24027 states. [2020-10-26 23:40:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24027 to 23898. [2020-10-26 23:40:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23898 states. [2020-10-26 23:40:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23898 states to 23898 states and 30021 transitions. [2020-10-26 23:40:48,832 INFO L78 Accepts]: Start accepts. Automaton has 23898 states and 30021 transitions. Word has length 636 [2020-10-26 23:40:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:48,832 INFO L481 AbstractCegarLoop]: Abstraction has 23898 states and 30021 transitions. [2020-10-26 23:40:48,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:40:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23898 states and 30021 transitions. [2020-10-26 23:40:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2020-10-26 23:40:48,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:48,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:48,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 23:40:48,853 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 288548173, now seen corresponding path program 1 times [2020-10-26 23:40:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:48,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45524492] [2020-10-26 23:40:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:49,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:49,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 660 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 491 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 23:40:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:50,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:50,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:40:50,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:50,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 23:40:50,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:40:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:51,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:51,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-26 23:40:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:51,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2020-10-26 23:40:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:51,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:51,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:51,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 23:40:51,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:40:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-26 23:40:51,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45524492] [2020-10-26 23:40:51,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:51,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:40:51,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174929537] [2020-10-26 23:40:51,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:51,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:51,933 INFO L87 Difference]: Start difference. First operand 23898 states and 30021 transitions. Second operand 8 states.