/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:45,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:45,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:45,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:45,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:45,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:45,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:45,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:45,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:45,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:45,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:45,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:45,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:45,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:45,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:45,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:45,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:45,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:45,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:45,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:45,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:45,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:45,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:45,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:45,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:45,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:45,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:45,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:45,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:45,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:45,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:45,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:45,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:45,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:45,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:45,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:45,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:45,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:45,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:45,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:45,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:45,514 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 [2020-10-27 14:18:45,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:45,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:45,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:45,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:45,573 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:45,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:45,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:45,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:45,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:45,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:45,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:45,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:45,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:45,577 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:45,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:45,578 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:45,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:45,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:45,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:45,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:45,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:45,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:45,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:45,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:45,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:45,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:45,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:45,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:45,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:45,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:46,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:46,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:46,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:46,063 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:46,064 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:46,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-27 14:18:46,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a6af7f1/cd607d63b9de4d9b83b08f3ef7dfb012/FLAGfdd081320 [2020-10-27 14:18:46,749 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:46,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-27 14:18:46,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a6af7f1/cd607d63b9de4d9b83b08f3ef7dfb012/FLAGfdd081320 [2020-10-27 14:18:47,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a6af7f1/cd607d63b9de4d9b83b08f3ef7dfb012 [2020-10-27 14:18:47,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:47,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:47,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:47,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:47,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:47,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f78def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47, skipping insertion in model container [2020-10-27 14:18:47,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:47,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:47,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:47,338 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:47,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:47,383 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:47,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47 WrapperNode [2020-10-27 14:18:47,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:47,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:47,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:47,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:47,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (1/1) ... [2020-10-27 14:18:47,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:47,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:47,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:47,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:47,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (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 [2020-10-27 14:18:47,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:47,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:47,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:47,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:47,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:47,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:47,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:47,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:47,931 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:47,932 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-27 14:18:47,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:47 BoogieIcfgContainer [2020-10-27 14:18:47,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:47,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:47,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:47,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:47,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:47" (1/3) ... [2020-10-27 14:18:47,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43eb25a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:47, skipping insertion in model container [2020-10-27 14:18:47,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:47" (2/3) ... [2020-10-27 14:18:47,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43eb25a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:47, skipping insertion in model container [2020-10-27 14:18:47,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:47" (3/3) ... [2020-10-27 14:18:47,944 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-10-27 14:18:47,958 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:47,963 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:18:47,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:18:48,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:18:48,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:18:48,031 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:18:48,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:18:48,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:18:48,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:18:48,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:18:48,032 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:18:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-27 14:18:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:18:48,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:48,058 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] [2020-10-27 14:18:48,058 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:48,065 INFO L82 PathProgramCache]: Analyzing trace with hash 235794212, now seen corresponding path program 1 times [2020-10-27 14:18:48,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:48,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959604499] [2020-10-27 14:18:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:49,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:49,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:18:49,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:18:49,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-27 14:18:49,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:18:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:18:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:18:49,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:49,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:49,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:49,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:49,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:18:49,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:49,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959604499] [2020-10-27 14:18:49,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:49,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:18:49,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664396168] [2020-10-27 14:18:49,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:18:49,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:18:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:49,634 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-27 14:18:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:49,817 INFO L93 Difference]: Finished difference Result 87 states and 127 transitions. [2020-10-27 14:18:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:18:49,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 14:18:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:49,828 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:18:49,828 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:18:49,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:18:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-27 14:18:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:18:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-27 14:18:49,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2020-10-27 14:18:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:49,881 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-27 14:18:49,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:18:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-27 14:18:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:18:49,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:49,883 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] [2020-10-27 14:18:49,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:18:49,884 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1644726824, now seen corresponding path program 1 times [2020-10-27 14:18:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624655207] [2020-10-27 14:18:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:49,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:49,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:50,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:54,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:18:54,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:18:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:18:54,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:18:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:18:54,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:18:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:54,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:54,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:54,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:54,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:18:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:18:55,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624655207] [2020-10-27 14:18:55,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:55,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:18:55,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327622959] [2020-10-27 14:18:55,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:18:55,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:18:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:55,012 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2020-10-27 14:18:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:55,247 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-27 14:18:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:18:55,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-27 14:18:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:55,250 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:18:55,251 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:18:55,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:18:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-27 14:18:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:18:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-27 14:18:55,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2020-10-27 14:18:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:55,281 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-27 14:18:55,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:18:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-27 14:18:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:18:55,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:55,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:55,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:18:55,287 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash -576553538, now seen corresponding path program 2 times [2020-10-27 14:18:55,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518927370] [2020-10-27 14:18:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:55,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:00,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:19:00,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:00,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:19:00,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:00,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:00,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:00,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:00,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:00,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:00,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:00,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:19:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518927370] [2020-10-27 14:19:00,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:00,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:00,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781849063] [2020-10-27 14:19:00,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:00,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:00,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:00,406 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 6 states. [2020-10-27 14:19:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:00,579 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2020-10-27 14:19:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:00,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-27 14:19:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:00,581 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:19:00,581 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:19:00,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:19:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-27 14:19:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:19:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-27 14:19:00,592 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2020-10-27 14:19:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:00,593 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-27 14:19:00,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-27 14:19:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:19:00,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:00,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:00,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:00,595 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:00,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1943809492, now seen corresponding path program 3 times [2020-10-27 14:19:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:00,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146103146] [2020-10-27 14:19:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:00,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:19:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:19:05,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:05,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:05,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:05,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:05,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:05,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:05,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:05,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:05,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:19:05,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146103146] [2020-10-27 14:19:05,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:05,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:05,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13090080] [2020-10-27 14:19:05,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:05,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:05,736 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 7 states. [2020-10-27 14:19:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:05,999 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-27 14:19:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:06,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 14:19:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:06,001 INFO L225 Difference]: With dead ends: 121 [2020-10-27 14:19:06,001 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:19:06,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:19:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-10-27 14:19:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:19:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-27 14:19:06,020 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 55 [2020-10-27 14:19:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:06,021 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-27 14:19:06,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-27 14:19:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:19:06,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:06,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:06,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:06,027 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1403258262, now seen corresponding path program 4 times [2020-10-27 14:19:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:06,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323954598] [2020-10-27 14:19:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:06,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:11,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:19:11,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:11,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:19:11,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:11,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:11,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:19:11,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323954598] [2020-10-27 14:19:11,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:11,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:11,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776253613] [2020-10-27 14:19:11,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:11,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:11,165 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2020-10-27 14:19:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:11,409 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-27 14:19:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:11,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 14:19:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:11,413 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:19:11,413 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:19:11,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:19:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-10-27 14:19:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:19:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-27 14:19:11,434 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 65 [2020-10-27 14:19:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:11,434 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-27 14:19:11,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-27 14:19:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:19:11,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:11,438 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:11,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:11,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2008005760, now seen corresponding path program 5 times [2020-10-27 14:19:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968243992] [2020-10-27 14:19:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:11,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:19:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:16,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:16,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:19:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968243992] [2020-10-27 14:19:16,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:16,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560480542] [2020-10-27 14:19:16,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:16,580 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 9 states. [2020-10-27 14:19:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:16,810 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2020-10-27 14:19:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:16,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-27 14:19:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:16,812 INFO L225 Difference]: With dead ends: 157 [2020-10-27 14:19:16,812 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:19:16,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:19:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-27 14:19:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:19:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-27 14:19:16,833 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 75 [2020-10-27 14:19:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:16,838 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-27 14:19:16,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-27 14:19:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:19:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:16,840 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:16,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:16,840 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1200658154, now seen corresponding path program 6 times [2020-10-27 14:19:16,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:16,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799151469] [2020-10-27 14:19:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:17,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:21,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:19:21,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:21,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:21,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:21,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:21,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:21,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:21,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:19:22,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799151469] [2020-10-27 14:19:22,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:22,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781275591] [2020-10-27 14:19:22,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:22,015 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 10 states. [2020-10-27 14:19:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:22,346 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2020-10-27 14:19:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:22,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-10-27 14:19:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:22,347 INFO L225 Difference]: With dead ends: 175 [2020-10-27 14:19:22,347 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:19:22,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:19:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2020-10-27 14:19:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:19:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-27 14:19:22,360 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 85 [2020-10-27 14:19:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:22,360 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-27 14:19:22,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-27 14:19:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:19:22,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:22,362 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:22,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:22,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1391971116, now seen corresponding path program 7 times [2020-10-27 14:19:22,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:22,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653151502] [2020-10-27 14:19:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:27,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:19:27,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:19:27,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:27,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:27,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:27,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:27,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 14:19:27,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653151502] [2020-10-27 14:19:27,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:27,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008349813] [2020-10-27 14:19:27,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:27,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:27,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:27,569 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 11 states. [2020-10-27 14:19:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:27,921 INFO L93 Difference]: Finished difference Result 193 states and 208 transitions. [2020-10-27 14:19:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:27,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-10-27 14:19:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:27,923 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:19:27,923 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:19:27,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:19:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2020-10-27 14:19:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:19:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-27 14:19:27,948 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 95 [2020-10-27 14:19:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:27,948 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-27 14:19:27,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-27 14:19:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:19:27,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:27,950 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:27,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:27,950 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:27,951 INFO L82 PathProgramCache]: Analyzing trace with hash 162515394, now seen corresponding path program 8 times [2020-10-27 14:19:27,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:27,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735081941] [2020-10-27 14:19:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:27,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:28,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:33,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:19:33,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:33,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-27 14:19:33,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:19:33,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:33,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:33,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 14:19:33,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735081941] [2020-10-27 14:19:33,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:33,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812194145] [2020-10-27 14:19:33,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:33,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:33,223 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 12 states. [2020-10-27 14:19:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:33,602 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2020-10-27 14:19:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:33,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-10-27 14:19:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:33,606 INFO L225 Difference]: With dead ends: 211 [2020-10-27 14:19:33,606 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:19:33,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:19:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-10-27 14:19:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:19:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2020-10-27 14:19:33,631 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 105 [2020-10-27 14:19:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:33,632 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2020-10-27 14:19:33,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2020-10-27 14:19:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:19:33,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:33,635 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:33,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:33,636 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash -538589992, now seen corresponding path program 9 times [2020-10-27 14:19:33,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:33,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064786277] [2020-10-27 14:19:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:33,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:38,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:19:38,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:38,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-27 14:19:38,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:38,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:38,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:38,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:38,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:38,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:38,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:38,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:38,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:19:38,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064786277] [2020-10-27 14:19:38,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:38,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370903047] [2020-10-27 14:19:38,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:38,876 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand 13 states. [2020-10-27 14:19:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:39,212 INFO L93 Difference]: Finished difference Result 229 states and 244 transitions. [2020-10-27 14:19:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:39,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-27 14:19:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:39,213 INFO L225 Difference]: With dead ends: 229 [2020-10-27 14:19:39,213 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:19:39,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:19:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2020-10-27 14:19:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 14:19:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2020-10-27 14:19:39,222 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 115 [2020-10-27 14:19:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:39,222 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2020-10-27 14:19:39,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2020-10-27 14:19:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:19:39,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:39,224 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:39,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:39,224 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1617960046, now seen corresponding path program 10 times [2020-10-27 14:19:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:39,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270207467] [2020-10-27 14:19:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:39,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:39,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:39,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:39,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:44,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:19:44,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:44,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:44,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 14:19:44,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270207467] [2020-10-27 14:19:44,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:44,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:44,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312325695] [2020-10-27 14:19:44,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:44,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:44,485 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand 14 states. [2020-10-27 14:19:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:44,923 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2020-10-27 14:19:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:19:44,924 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 125 [2020-10-27 14:19:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:44,925 INFO L225 Difference]: With dead ends: 247 [2020-10-27 14:19:44,925 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:19:44,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:19:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2020-10-27 14:19:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:19:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2020-10-27 14:19:44,933 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 125 [2020-10-27 14:19:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:44,934 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2020-10-27 14:19:44,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:19:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2020-10-27 14:19:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:19:44,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:44,935 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:44,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:19:44,936 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1403859076, now seen corresponding path program 11 times [2020-10-27 14:19:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:44,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154674070] [2020-10-27 14:19:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:44,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:44,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:19:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:50,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 14:19:50,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154674070] [2020-10-27 14:19:50,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:50,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:19:50,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721438387] [2020-10-27 14:19:50,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:19:50,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:19:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:50,205 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand 15 states. [2020-10-27 14:19:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:50,671 INFO L93 Difference]: Finished difference Result 265 states and 280 transitions. [2020-10-27 14:19:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:19:50,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-10-27 14:19:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:50,673 INFO L225 Difference]: With dead ends: 265 [2020-10-27 14:19:50,674 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:19:50,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:19:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2020-10-27 14:19:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 14:19:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2020-10-27 14:19:50,681 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 135 [2020-10-27 14:19:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2020-10-27 14:19:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:19:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2020-10-27 14:19:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 14:19:50,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:50,684 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:50,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:19:50,684 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -175939302, now seen corresponding path program 12 times [2020-10-27 14:19:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:50,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003070326] [2020-10-27 14:19:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:50,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:50,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:55,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:55,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 14:19:55,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:19:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:56,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:56,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:56,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:56,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:56,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 14:19:56,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003070326] [2020-10-27 14:19:56,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:56,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:19:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355164326] [2020-10-27 14:19:56,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:19:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:19:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:56,063 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand 16 states. [2020-10-27 14:19:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:56,602 INFO L93 Difference]: Finished difference Result 283 states and 298 transitions. [2020-10-27 14:19:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:19:56,602 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2020-10-27 14:19:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:56,605 INFO L225 Difference]: With dead ends: 283 [2020-10-27 14:19:56,605 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:19:56,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:19:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2020-10-27 14:19:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:19:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2020-10-27 14:19:56,617 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 145 [2020-10-27 14:19:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:56,618 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2020-10-27 14:19:56,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:19:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2020-10-27 14:19:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:19:56,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:56,620 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:56,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:19:56,620 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1419702736, now seen corresponding path program 13 times [2020-10-27 14:19:56,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:56,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484000941] [2020-10-27 14:19:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:56,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:56,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:01,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:01,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:20:01,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-27 14:20:01,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:20:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:01,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:01,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:01,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:01,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 14:20:01,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484000941] [2020-10-27 14:20:01,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:01,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:01,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311590698] [2020-10-27 14:20:01,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:01,988 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand 17 states. [2020-10-27 14:20:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:02,462 INFO L93 Difference]: Finished difference Result 301 states and 316 transitions. [2020-10-27 14:20:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:02,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 155 [2020-10-27 14:20:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:02,465 INFO L225 Difference]: With dead ends: 301 [2020-10-27 14:20:02,465 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:20:02,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:20:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2020-10-27 14:20:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 14:20:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2020-10-27 14:20:02,477 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 155 [2020-10-27 14:20:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:02,478 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2020-10-27 14:20:02,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2020-10-27 14:20:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 14:20:02,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:02,480 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:02,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:02,480 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 977049542, now seen corresponding path program 14 times [2020-10-27 14:20:02,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:02,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064494148] [2020-10-27 14:20:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:02,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:02,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:07,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:07,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:07,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:07,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:07,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 14:20:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064494148] [2020-10-27 14:20:07,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:07,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94357488] [2020-10-27 14:20:07,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:07,888 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand 18 states. [2020-10-27 14:20:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:08,486 INFO L93 Difference]: Finished difference Result 319 states and 334 transitions. [2020-10-27 14:20:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:08,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 165 [2020-10-27 14:20:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:08,489 INFO L225 Difference]: With dead ends: 319 [2020-10-27 14:20:08,489 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:20:08,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:20:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2020-10-27 14:20:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 14:20:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 187 transitions. [2020-10-27 14:20:08,498 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 187 transitions. Word has length 165 [2020-10-27 14:20:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:08,498 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 187 transitions. [2020-10-27 14:20:08,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 187 transitions. [2020-10-27 14:20:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:20:08,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:08,501 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:08,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:08,501 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2090098140, now seen corresponding path program 15 times [2020-10-27 14:20:08,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:08,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906015483] [2020-10-27 14:20:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:08,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:08,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:08,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:08,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:13,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:13,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:14,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:14,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 14:20:14,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906015483] [2020-10-27 14:20:14,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:14,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:14,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687598052] [2020-10-27 14:20:14,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:14,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:14,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:14,027 INFO L87 Difference]: Start difference. First operand 181 states and 187 transitions. Second operand 19 states. [2020-10-27 14:20:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:14,656 INFO L93 Difference]: Finished difference Result 337 states and 352 transitions. [2020-10-27 14:20:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:14,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 175 [2020-10-27 14:20:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:14,659 INFO L225 Difference]: With dead ends: 337 [2020-10-27 14:20:14,659 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:20:14,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:20:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2020-10-27 14:20:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 14:20:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2020-10-27 14:20:14,670 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 175 [2020-10-27 14:20:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:14,670 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2020-10-27 14:20:14,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2020-10-27 14:20:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 14:20:14,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:14,673 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:14,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:14,673 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1737572238, now seen corresponding path program 16 times [2020-10-27 14:20:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:14,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011521072] [2020-10-27 14:20:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:14,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:20:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:20,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:20,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:20,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:20,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:20,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:20,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 14:20:20,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011521072] [2020-10-27 14:20:20,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:20,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:20,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193732930] [2020-10-27 14:20:20,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:20,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:20,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:20,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:20,147 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand 20 states. [2020-10-27 14:20:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:20,677 INFO L93 Difference]: Finished difference Result 355 states and 370 transitions. [2020-10-27 14:20:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:20,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-10-27 14:20:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:20,680 INFO L225 Difference]: With dead ends: 355 [2020-10-27 14:20:20,680 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:20:20,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:20:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2020-10-27 14:20:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 14:20:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 207 transitions. [2020-10-27 14:20:20,700 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 207 transitions. Word has length 185 [2020-10-27 14:20:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:20,700 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 207 transitions. [2020-10-27 14:20:20,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 207 transitions. [2020-10-27 14:20:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:20:20,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:20,702 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:20,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:20,702 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1252384888, now seen corresponding path program 17 times [2020-10-27 14:20:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:20,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663474065] [2020-10-27 14:20:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:20,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:25,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:26,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:26,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:26,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:26,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 14:20:26,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663474065] [2020-10-27 14:20:26,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:26,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123701022] [2020-10-27 14:20:26,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:26,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:26,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:26,119 INFO L87 Difference]: Start difference. First operand 201 states and 207 transitions. Second operand 21 states. [2020-10-27 14:20:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:26,822 INFO L93 Difference]: Finished difference Result 373 states and 388 transitions. [2020-10-27 14:20:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:26,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 195 [2020-10-27 14:20:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:26,825 INFO L225 Difference]: With dead ends: 373 [2020-10-27 14:20:26,825 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:20:26,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:20:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-10-27 14:20:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 14:20:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 217 transitions. [2020-10-27 14:20:26,837 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 217 transitions. Word has length 195 [2020-10-27 14:20:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:26,837 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 217 transitions. [2020-10-27 14:20:26,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 217 transitions. [2020-10-27 14:20:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 14:20:26,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:26,839 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:26,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:26,839 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash 845994782, now seen corresponding path program 18 times [2020-10-27 14:20:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:26,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239452381] [2020-10-27 14:20:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:32,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:32,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:32,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:32,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-27 14:20:32,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239452381] [2020-10-27 14:20:32,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:32,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:32,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195912649] [2020-10-27 14:20:32,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:32,370 INFO L87 Difference]: Start difference. First operand 211 states and 217 transitions. Second operand 22 states. [2020-10-27 14:20:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:33,076 INFO L93 Difference]: Finished difference Result 391 states and 406 transitions. [2020-10-27 14:20:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:33,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 205 [2020-10-27 14:20:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:33,079 INFO L225 Difference]: With dead ends: 391 [2020-10-27 14:20:33,079 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 14:20:33,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 14:20:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2020-10-27 14:20:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 14:20:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 227 transitions. [2020-10-27 14:20:33,092 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 227 transitions. Word has length 205 [2020-10-27 14:20:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:33,092 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 227 transitions. [2020-10-27 14:20:33,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 227 transitions. [2020-10-27 14:20:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 14:20:33,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:33,095 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:33,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:33,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1548047156, now seen corresponding path program 19 times [2020-10-27 14:20:33,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:33,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912860955] [2020-10-27 14:20:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:38,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5864 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:38,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:39,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:39,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:39,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-27 14:20:39,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912860955] [2020-10-27 14:20:39,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:39,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:39,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706722749] [2020-10-27 14:20:39,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:39,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:39,407 INFO L87 Difference]: Start difference. First operand 221 states and 227 transitions. Second operand 23 states. [2020-10-27 14:20:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:40,029 INFO L93 Difference]: Finished difference Result 409 states and 424 transitions. [2020-10-27 14:20:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:40,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 215 [2020-10-27 14:20:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:40,031 INFO L225 Difference]: With dead ends: 409 [2020-10-27 14:20:40,032 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 14:20:40,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 14:20:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2020-10-27 14:20:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 14:20:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 237 transitions. [2020-10-27 14:20:40,056 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 237 transitions. Word has length 215 [2020-10-27 14:20:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:40,056 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 237 transitions. [2020-10-27 14:20:40,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 237 transitions. [2020-10-27 14:20:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 14:20:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:40,058 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:40,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:40,059 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1559631926, now seen corresponding path program 20 times [2020-10-27 14:20:40,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:40,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650009164] [2020-10-27 14:20:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:45,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:45,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:20:45,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:45,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:45,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:45,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:45,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-27 14:20:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650009164] [2020-10-27 14:20:45,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:45,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:20:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091639371] [2020-10-27 14:20:45,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:20:45,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:20:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:45,532 INFO L87 Difference]: Start difference. First operand 231 states and 237 transitions. Second operand 24 states. [2020-10-27 14:20:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:46,316 INFO L93 Difference]: Finished difference Result 427 states and 442 transitions. [2020-10-27 14:20:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:20:46,317 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 225 [2020-10-27 14:20:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:46,319 INFO L225 Difference]: With dead ends: 427 [2020-10-27 14:20:46,319 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:20:46,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:20:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2020-10-27 14:20:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 14:20:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 247 transitions. [2020-10-27 14:20:46,331 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 247 transitions. Word has length 225 [2020-10-27 14:20:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 247 transitions. [2020-10-27 14:20:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:20:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 247 transitions. [2020-10-27 14:20:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 14:20:46,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:46,333 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:46,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:20:46,333 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1349056736, now seen corresponding path program 21 times [2020-10-27 14:20:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:46,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070693095] [2020-10-27 14:20:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:51,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:51,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 14:20:51,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5268 [2020-10-27 14:20:51,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:20:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:20:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:20:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:52,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-27 14:20:52,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070693095] [2020-10-27 14:20:52,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:52,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:20:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686472183] [2020-10-27 14:20:52,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:20:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:20:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:52,127 INFO L87 Difference]: Start difference. First operand 241 states and 247 transitions. Second operand 25 states. [2020-10-27 14:20:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:52,932 INFO L93 Difference]: Finished difference Result 445 states and 460 transitions. [2020-10-27 14:20:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:20:52,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 235 [2020-10-27 14:20:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:52,934 INFO L225 Difference]: With dead ends: 445 [2020-10-27 14:20:52,934 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 14:20:52,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 14:20:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 251. [2020-10-27 14:20:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 14:20:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 257 transitions. [2020-10-27 14:20:52,946 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 257 transitions. Word has length 235 [2020-10-27 14:20:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:52,947 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 257 transitions. [2020-10-27 14:20:52,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:20:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 257 transitions. [2020-10-27 14:20:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 14:20:52,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:52,949 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:52,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:20:52,949 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:52,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1114053002, now seen corresponding path program 22 times [2020-10-27 14:20:52,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:52,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106224578] [2020-10-27 14:20:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:20:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:58,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:58,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:58,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:58,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:58,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:58,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:58,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:58,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:58,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:58,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-10-27 14:20:58,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106224578] [2020-10-27 14:20:58,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:58,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:20:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297909949] [2020-10-27 14:20:58,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:20:58,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:20:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:58,749 INFO L87 Difference]: Start difference. First operand 251 states and 257 transitions. Second operand 26 states. [2020-10-27 14:20:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:59,464 INFO L93 Difference]: Finished difference Result 463 states and 478 transitions. [2020-10-27 14:20:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:20:59,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 245 [2020-10-27 14:20:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:59,467 INFO L225 Difference]: With dead ends: 463 [2020-10-27 14:20:59,467 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 14:20:59,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 14:20:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 261. [2020-10-27 14:20:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 14:20:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 267 transitions. [2020-10-27 14:20:59,478 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 267 transitions. Word has length 245 [2020-10-27 14:20:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:59,478 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 267 transitions. [2020-10-27 14:20:59,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:20:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 267 transitions. [2020-10-27 14:20:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 14:20:59,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:59,481 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:59,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:20:59,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash 156766348, now seen corresponding path program 23 times [2020-10-27 14:20:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:59,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235266031] [2020-10-27 14:20:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:05,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:05,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 14:21:05,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6008 [2020-10-27 14:21:05,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:21:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:05,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:06,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:06,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-10-27 14:21:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235266031] [2020-10-27 14:21:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:06,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787651877] [2020-10-27 14:21:06,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:06,082 INFO L87 Difference]: Start difference. First operand 261 states and 267 transitions. Second operand 27 states. [2020-10-27 14:21:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:06,933 INFO L93 Difference]: Finished difference Result 481 states and 496 transitions. [2020-10-27 14:21:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:06,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 255 [2020-10-27 14:21:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:06,936 INFO L225 Difference]: With dead ends: 481 [2020-10-27 14:21:06,936 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 14:21:06,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 14:21:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 271. [2020-10-27 14:21:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-27 14:21:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 277 transitions. [2020-10-27 14:21:06,948 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 277 transitions. Word has length 255 [2020-10-27 14:21:06,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:06,948 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 277 transitions. [2020-10-27 14:21:06,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 277 transitions. [2020-10-27 14:21:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 14:21:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:06,950 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:06,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:06,950 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1307367202, now seen corresponding path program 24 times [2020-10-27 14:21:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509307632] [2020-10-27 14:21:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7549 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:15,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:15,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:21:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-27 14:21:15,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509307632] [2020-10-27 14:21:15,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:15,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:15,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246908399] [2020-10-27 14:21:15,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:15,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:15,184 INFO L87 Difference]: Start difference. First operand 271 states and 277 transitions. Second operand 28 states. [2020-10-27 14:21:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:16,096 INFO L93 Difference]: Finished difference Result 499 states and 514 transitions. [2020-10-27 14:21:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:16,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 265 [2020-10-27 14:21:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:16,099 INFO L225 Difference]: With dead ends: 499 [2020-10-27 14:21:16,099 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 14:21:16,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 14:21:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 281. [2020-10-27 14:21:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-27 14:21:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 287 transitions. [2020-10-27 14:21:16,111 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 287 transitions. Word has length 265 [2020-10-27 14:21:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:16,111 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 287 transitions. [2020-10-27 14:21:16,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 287 transitions. [2020-10-27 14:21:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 14:21:16,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:16,113 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:16,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:16,114 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1462082104, now seen corresponding path program 25 times [2020-10-27 14:21:16,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:16,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757249361] [2020-10-27 14:21:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5532 [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 14:21:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:21,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:22,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:22,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:22,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3125 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-10-27 14:21:22,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757249361] [2020-10-27 14:21:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:22,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908018441] [2020-10-27 14:21:22,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:22,355 INFO L87 Difference]: Start difference. First operand 281 states and 287 transitions. Second operand 29 states. [2020-10-27 14:21:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:23,153 INFO L93 Difference]: Finished difference Result 517 states and 532 transitions. [2020-10-27 14:21:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:23,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 275 [2020-10-27 14:21:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:23,157 INFO L225 Difference]: With dead ends: 517 [2020-10-27 14:21:23,157 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 14:21:23,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 14:21:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 291. [2020-10-27 14:21:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 14:21:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 297 transitions. [2020-10-27 14:21:23,169 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 297 transitions. Word has length 275 [2020-10-27 14:21:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:23,170 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 297 transitions. [2020-10-27 14:21:23,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 297 transitions. [2020-10-27 14:21:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 14:21:23,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:23,172 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:23,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:23,172 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -665273906, now seen corresponding path program 26 times [2020-10-27 14:21:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:23,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630287073] [2020-10-27 14:21:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:23,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5587 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:21:28,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:29,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:29,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:29,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:29,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:29,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:29,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:29,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3380 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2020-10-27 14:21:29,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630287073] [2020-10-27 14:21:29,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:21:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977236265] [2020-10-27 14:21:29,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:21:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:21:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:29,477 INFO L87 Difference]: Start difference. First operand 291 states and 297 transitions. Second operand 30 states. [2020-10-27 14:21:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:30,419 INFO L93 Difference]: Finished difference Result 535 states and 550 transitions. [2020-10-27 14:21:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:21:30,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 285 [2020-10-27 14:21:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:30,421 INFO L225 Difference]: With dead ends: 535 [2020-10-27 14:21:30,421 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 14:21:30,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 14:21:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-10-27 14:21:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 14:21:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 307 transitions. [2020-10-27 14:21:30,433 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 307 transitions. Word has length 285 [2020-10-27 14:21:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:30,434 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 307 transitions. [2020-10-27 14:21:30,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:21:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 307 transitions. [2020-10-27 14:21:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 14:21:30,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:30,436 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:30,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:30,436 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 577017316, now seen corresponding path program 27 times [2020-10-27 14:21:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:30,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464988205] [2020-10-27 14:21:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5325 [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:21:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 14:21:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:21:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:36,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:36,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3645 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-27 14:21:36,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464988205] [2020-10-27 14:21:36,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:36,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:21:36,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937997156] [2020-10-27 14:21:36,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:21:36,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:21:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:36,522 INFO L87 Difference]: Start difference. First operand 301 states and 307 transitions. Second operand 31 states. [2020-10-27 14:21:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:37,497 INFO L93 Difference]: Finished difference Result 553 states and 568 transitions. [2020-10-27 14:21:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:21:37,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 295 [2020-10-27 14:21:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:37,500 INFO L225 Difference]: With dead ends: 553 [2020-10-27 14:21:37,500 INFO L226 Difference]: Without dead ends: 316 [2020-10-27 14:21:37,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-27 14:21:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2020-10-27 14:21:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-27 14:21:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 317 transitions. [2020-10-27 14:21:37,513 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 317 transitions. Word has length 295 [2020-10-27 14:21:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:37,513 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 317 transitions. [2020-10-27 14:21:37,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:21:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 317 transitions. [2020-10-27 14:21:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 14:21:37,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:37,516 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:37,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:21:37,516 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1504677498, now seen corresponding path program 28 times [2020-10-27 14:21:37,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:37,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97500832] [2020-10-27 14:21:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:42,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:21:42,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 14:21:42,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:21:42,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:43,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:43,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3920 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2020-10-27 14:21:43,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97500832] [2020-10-27 14:21:43,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:43,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:21:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925117541] [2020-10-27 14:21:43,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:21:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:21:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:43,411 INFO L87 Difference]: Start difference. First operand 311 states and 317 transitions. Second operand 32 states. [2020-10-27 14:21:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:44,352 INFO L93 Difference]: Finished difference Result 571 states and 586 transitions. [2020-10-27 14:21:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:21:44,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 305 [2020-10-27 14:21:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:44,355 INFO L225 Difference]: With dead ends: 571 [2020-10-27 14:21:44,355 INFO L226 Difference]: Without dead ends: 326 [2020-10-27 14:21:44,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-27 14:21:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2020-10-27 14:21:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-27 14:21:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 327 transitions. [2020-10-27 14:21:44,368 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 327 transitions. Word has length 305 [2020-10-27 14:21:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:44,368 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 327 transitions. [2020-10-27 14:21:44,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:21:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 327 transitions. [2020-10-27 14:21:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 14:21:44,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:44,371 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:44,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:21:44,372 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash 740819856, now seen corresponding path program 29 times [2020-10-27 14:21:44,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:44,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618431048] [2020-10-27 14:21:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:44,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:21:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:50,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:50,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:50,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4205 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2020-10-27 14:21:50,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618431048] [2020-10-27 14:21:50,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:50,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:21:50,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456611425] [2020-10-27 14:21:50,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:21:50,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:21:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:50,443 INFO L87 Difference]: Start difference. First operand 321 states and 327 transitions. Second operand 33 states. [2020-10-27 14:21:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:51,511 INFO L93 Difference]: Finished difference Result 589 states and 604 transitions. [2020-10-27 14:21:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:21:51,512 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 315 [2020-10-27 14:21:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:51,517 INFO L225 Difference]: With dead ends: 589 [2020-10-27 14:21:51,517 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:21:51,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:21:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 331. [2020-10-27 14:21:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-27 14:21:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 337 transitions. [2020-10-27 14:21:51,529 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 337 transitions. Word has length 315 [2020-10-27 14:21:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:51,529 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 337 transitions. [2020-10-27 14:21:51,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:21:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 337 transitions. [2020-10-27 14:21:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-27 14:21:51,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:51,532 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:51,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:21:51,532 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash 121918758, now seen corresponding path program 30 times [2020-10-27 14:21:51,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:51,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787924812] [2020-10-27 14:21:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:57,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5771 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:21:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:58,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:58,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:58,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:58,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:58,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4500 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2020-10-27 14:21:58,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787924812] [2020-10-27 14:21:58,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:58,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:21:58,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092813401] [2020-10-27 14:21:58,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:21:58,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:58,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:21:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:58,175 INFO L87 Difference]: Start difference. First operand 331 states and 337 transitions. Second operand 34 states. [2020-10-27 14:21:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:59,281 INFO L93 Difference]: Finished difference Result 607 states and 622 transitions. [2020-10-27 14:21:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:21:59,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 325 [2020-10-27 14:21:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:59,284 INFO L225 Difference]: With dead ends: 607 [2020-10-27 14:21:59,284 INFO L226 Difference]: Without dead ends: 346 [2020-10-27 14:21:59,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-27 14:21:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2020-10-27 14:21:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-27 14:21:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 347 transitions. [2020-10-27 14:21:59,297 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 347 transitions. Word has length 325 [2020-10-27 14:21:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:59,297 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 347 transitions. [2020-10-27 14:21:59,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:21:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 347 transitions. [2020-10-27 14:21:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-27 14:21:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:59,300 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:59,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:21:59,300 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -838671556, now seen corresponding path program 31 times [2020-10-27 14:21:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799720495] [2020-10-27 14:21:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:59,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:09,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-27 14:22:09,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10198 [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:22:09,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:10,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:10,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2020-10-27 14:22:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799720495] [2020-10-27 14:22:10,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:10,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:22:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077636889] [2020-10-27 14:22:10,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:22:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:22:10,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:10,489 INFO L87 Difference]: Start difference. First operand 341 states and 347 transitions. Second operand 35 states. [2020-10-27 14:22:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:11,714 INFO L93 Difference]: Finished difference Result 625 states and 640 transitions. [2020-10-27 14:22:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:22:11,715 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 335 [2020-10-27 14:22:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:11,718 INFO L225 Difference]: With dead ends: 625 [2020-10-27 14:22:11,718 INFO L226 Difference]: Without dead ends: 356 [2020-10-27 14:22:11,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-27 14:22:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 351. [2020-10-27 14:22:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 14:22:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 357 transitions. [2020-10-27 14:22:11,731 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 357 transitions. Word has length 335 [2020-10-27 14:22:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:11,731 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 357 transitions. [2020-10-27 14:22:11,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:22:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 357 transitions. [2020-10-27 14:22:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-27 14:22:11,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:11,734 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:11,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:22:11,734 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash 250219986, now seen corresponding path program 32 times [2020-10-27 14:22:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944829066] [2020-10-27 14:22:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5567 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:22:17,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:18,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:18,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5120 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2020-10-27 14:22:18,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944829066] [2020-10-27 14:22:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:22:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940029704] [2020-10-27 14:22:18,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:22:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:22:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:18,341 INFO L87 Difference]: Start difference. First operand 351 states and 357 transitions. Second operand 36 states. [2020-10-27 14:22:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:19,617 INFO L93 Difference]: Finished difference Result 643 states and 658 transitions. [2020-10-27 14:22:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:22:19,618 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 345 [2020-10-27 14:22:19,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:19,621 INFO L225 Difference]: With dead ends: 643 [2020-10-27 14:22:19,621 INFO L226 Difference]: Without dead ends: 366 [2020-10-27 14:22:19,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-27 14:22:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 361. [2020-10-27 14:22:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-27 14:22:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 367 transitions. [2020-10-27 14:22:19,633 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 367 transitions. Word has length 345 [2020-10-27 14:22:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:19,633 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 367 transitions. [2020-10-27 14:22:19,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:22:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 367 transitions. [2020-10-27 14:22:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-27 14:22:19,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:19,636 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:19,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:22:19,636 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1173867288, now seen corresponding path program 33 times [2020-10-27 14:22:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:19,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457527663] [2020-10-27 14:22:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:19,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:25,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 365 [2020-10-27 14:22:25,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5836 [2020-10-27 14:22:25,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:25,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:22:25,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-27 14:22:25,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:22:25,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:26,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:26,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:26,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:26,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 4356 trivial. 0 not checked. [2020-10-27 14:22:26,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457527663] [2020-10-27 14:22:26,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:26,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:22:26,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59454838] [2020-10-27 14:22:26,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:22:26,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:22:26,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:26,542 INFO L87 Difference]: Start difference. First operand 361 states and 367 transitions. Second operand 37 states. [2020-10-27 14:22:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:27,876 INFO L93 Difference]: Finished difference Result 661 states and 676 transitions. [2020-10-27 14:22:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:22:27,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 355 [2020-10-27 14:22:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:27,879 INFO L225 Difference]: With dead ends: 661 [2020-10-27 14:22:27,880 INFO L226 Difference]: Without dead ends: 376 [2020-10-27 14:22:27,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-27 14:22:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 371. [2020-10-27 14:22:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-27 14:22:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 377 transitions. [2020-10-27 14:22:27,892 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 377 transitions. Word has length 355 [2020-10-27 14:22:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:27,893 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 377 transitions. [2020-10-27 14:22:27,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:22:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 377 transitions. [2020-10-27 14:22:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-27 14:22:27,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:27,896 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:27,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:22:27,896 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1458813054, now seen corresponding path program 34 times [2020-10-27 14:22:27,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:27,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076993687] [2020-10-27 14:22:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:27,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:28,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking...