/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/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:23:09,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:23:09,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:23:09,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:23:09,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:23:09,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:23:09,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:23:09,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:23:09,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:23:09,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:23:09,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:23:09,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:23:09,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:23:09,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:23:09,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:23:09,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:23:09,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:23:09,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:23:09,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:23:09,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:23:09,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:23:09,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:23:09,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:23:09,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:23:09,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:23:09,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:23:09,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:23:09,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:23:09,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:23:09,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:23:09,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:23:09,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:23:09,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:23:09,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:23:09,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:23:09,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:23:09,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:23:09,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:23:09,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:23:09,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:23:09,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:23:09,537 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 20:23:09,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:23:09,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:23:09,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:23:09,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:23:09,588 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:23:09,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:23:09,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:23:09,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:23:09,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:23:09,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:23:09,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:23:09,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:23:09,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:23:09,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:23:09,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:23:09,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:23:09,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:23:09,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:23:09,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:23:09,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:23:09,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:23:09,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:23:09,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:23:09,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:23:09,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:23:09,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:23:09,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:23:09,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:23:09,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:23:09,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:23:10,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:23:10,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:23:10,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:23:10,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:23:10,052 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:23:10,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-27 20:23:10,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb9a79f67/ba183223b4b94db4b0b336e0592d0e50/FLAGf9f5f1e5c [2020-10-27 20:23:10,661 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:23:10,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-27 20:23:10,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb9a79f67/ba183223b4b94db4b0b336e0592d0e50/FLAGf9f5f1e5c [2020-10-27 20:23:11,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb9a79f67/ba183223b4b94db4b0b336e0592d0e50 [2020-10-27 20:23:11,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:23:11,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:23:11,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:23:11,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:23:11,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:23:11,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46922da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11, skipping insertion in model container [2020-10-27 20:23:11,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:23:11,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:23:11,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:23:11,250 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:23:11,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:23:11,285 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:23:11,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11 WrapperNode [2020-10-27 20:23:11,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:23:11,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:23:11,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:23:11,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:23:11,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (1/1) ... [2020-10-27 20:23:11,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:23:11,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:23:11,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:23:11,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:23:11,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (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 20:23:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:23:11,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:23:11,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:23:11,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:23:11,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:23:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:23:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:23:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:23:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:23:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:23:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:23:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:23:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:23:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:23:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:23:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:23:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:23:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:23:11,691 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:23:11,692 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:23:11,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:11 BoogieIcfgContainer [2020-10-27 20:23:11,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:23:11,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:23:11,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:23:11,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:23:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:23:11" (1/3) ... [2020-10-27 20:23:11,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69084412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:11, skipping insertion in model container [2020-10-27 20:23:11,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:11" (2/3) ... [2020-10-27 20:23:11,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69084412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:11, skipping insertion in model container [2020-10-27 20:23:11,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:11" (3/3) ... [2020-10-27 20:23:11,705 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2020-10-27 20:23:11,738 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:23:11,748 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:23:11,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:23:11,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:23:11,836 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:23:11,837 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:23:11,837 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:23:11,837 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:23:11,837 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:23:11,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:23:11,838 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:23:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 20:23:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:23:11,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:11,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:11,872 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash -560740121, now seen corresponding path program 1 times [2020-10-27 20:23:11,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:11,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933319284] [2020-10-27 20:23:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:12,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:12,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:23:12,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:12,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 20:23:12,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:12,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:23:12,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:23:12,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:23:12,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:23:12,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:12,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:12,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:12,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:12,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:23:12,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:12,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:12,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:12,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:12,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:12,651 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 20:23:12,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933319284] [2020-10-27 20:23:12,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:12,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:23:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597520595] [2020-10-27 20:23:12,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:23:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:23:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:23:12,678 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-27 20:23:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:13,061 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2020-10-27 20:23:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:23:13,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 20:23:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:13,071 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:23:13,071 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:23:13,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:23:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:23:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:23:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-27 20:23:13,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2020-10-27 20:23:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:13,120 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-27 20:23:13,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:23:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-27 20:23:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:23:13,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:13,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:13,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:23:13,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 866261939, now seen corresponding path program 1 times [2020-10-27 20:23:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:13,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124474842] [2020-10-27 20:23:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:13,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:23:13,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:13,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 20:23:13,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:23:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:23:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:23:13,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:23:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:13,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:13,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:13,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 20:23:13,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:13,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:13,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:13,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:13,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:23:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:23:13,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124474842] [2020-10-27 20:23:13,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:23:13,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:23:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484934976] [2020-10-27 20:23:13,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:23:13,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:13,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:23:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:23:13,545 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-10-27 20:23:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:13,810 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-10-27 20:23:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:23:13,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:23:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:13,812 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:23:13,812 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:23:13,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:23:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:23:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:23:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:23:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:23:13,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-10-27 20:23:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:13,822 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:23:13,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:23:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:23:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:23:13,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:13,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:13,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:23:13,824 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1137579962, now seen corresponding path program 1 times [2020-10-27 20:23:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:13,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501570383] [2020-10-27 20:23:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:13,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:13,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:14,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:14,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:23:14,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 20:23:14,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:23:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:23:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:14,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:14,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:14,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:23:14,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:23:14,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501570383] [2020-10-27 20:23:14,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:14,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:23:14,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864081704] [2020-10-27 20:23:14,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:23:14,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:23:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:23:14,189 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 20:23:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:14,386 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-27 20:23:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:23:14,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:23:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:14,388 INFO L225 Difference]: With dead ends: 25 [2020-10-27 20:23:14,388 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:23:14,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:23:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:23:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:23:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 20:23:14,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2020-10-27 20:23:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:14,396 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 20:23:14,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:23:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 20:23:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:23:14,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:14,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:14,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:23:14,397 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash 164096052, now seen corresponding path program 1 times [2020-10-27 20:23:14,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:14,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604474636] [2020-10-27 20:23:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:14,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:14,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:14,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:23:14,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:14,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 20:23:14,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:14,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:23:14,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:23:14,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:23:14,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:14,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:14,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:14,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:14,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:23:14,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:23:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604474636] [2020-10-27 20:23:14,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:14,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:23:14,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566621150] [2020-10-27 20:23:14,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:23:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:23:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:14,844 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-27 20:23:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:15,105 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 20:23:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:23:15,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:23:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:15,107 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:23:15,107 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:23:15,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:23:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 20:23:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:23:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-27 20:23:15,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-27 20:23:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:15,124 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-27 20:23:15,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:23:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-27 20:23:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:23:15,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:15,125 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:15,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:23:15,126 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1861346822, now seen corresponding path program 2 times [2020-10-27 20:23:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:15,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218268690] [2020-10-27 20:23:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:15,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:15,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:23:15,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:15,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 20:23:15,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:15,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:23:15,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:23:15,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:15,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:15,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:15,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:15,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:15,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:23:15,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:15,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:15,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:15,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:15,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:23:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:23:15,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218268690] [2020-10-27 20:23:15,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:15,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:23:15,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548783060] [2020-10-27 20:23:15,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:23:15,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:23:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:15,674 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-10-27 20:23:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:16,126 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-27 20:23:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:23:16,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 20:23:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:16,128 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:23:16,128 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:23:16,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:23:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:23:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 20:23:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:23:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 20:23:16,148 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-27 20:23:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:16,151 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 20:23:16,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:23:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 20:23:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:23:16,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:16,152 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:16,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:23:16,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1359707317, now seen corresponding path program 3 times [2020-10-27 20:23:16,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:16,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864125527] [2020-10-27 20:23:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:16,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:23:16,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-27 20:23:16,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:23:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:23:16,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:23:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:16,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:16,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:23:16,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864125527] [2020-10-27 20:23:16,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:16,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:23:16,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874171019] [2020-10-27 20:23:16,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:23:16,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:23:16,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:23:16,620 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-27 20:23:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:16,936 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 20:23:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:23:16,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 20:23:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:16,937 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:23:16,937 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:23:16,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:23:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:23:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 20:23:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:23:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 20:23:16,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-27 20:23:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:16,945 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 20:23:16,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:23:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 20:23:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:23:16,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:16,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:16,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:23:16,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2084304327, now seen corresponding path program 4 times [2020-10-27 20:23:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:16,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376441374] [2020-10-27 20:23:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:17,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:23:17,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 20:23:17,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:23:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:23:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:17,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:17,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:17,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:17,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:17,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:23:17,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376441374] [2020-10-27 20:23:17,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:17,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:23:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122709414] [2020-10-27 20:23:17,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:23:17,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:23:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:23:17,261 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-10-27 20:23:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:17,572 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 20:23:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:23:17,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 20:23:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:17,573 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:23:17,573 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:23:17,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:23:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:23:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-27 20:23:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:23:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-27 20:23:17,581 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2020-10-27 20:23:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:17,581 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-27 20:23:17,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:23:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-27 20:23:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:23:17,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:17,582 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:17,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:23:17,583 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1258261203, now seen corresponding path program 5 times [2020-10-27 20:23:17,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:17,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631466369] [2020-10-27 20:23:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:17,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:18,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:23:18,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 20:23:18,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:23:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:23:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:23:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:18,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:18,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:18,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:23:18,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631466369] [2020-10-27 20:23:18,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:18,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:23:18,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143682707] [2020-10-27 20:23:18,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:23:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:23:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:18,474 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-10-27 20:23:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:18,860 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 20:23:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:23:18,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 20:23:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:18,861 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:23:18,861 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:23:18,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:23:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:23:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:23:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 20:23:18,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-27 20:23:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:18,869 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 20:23:18,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:23:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 20:23:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:23:18,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:18,870 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:18,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:23:18,871 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1407661564, now seen corresponding path program 6 times [2020-10-27 20:23:18,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:18,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809665034] [2020-10-27 20:23:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:18,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:18,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:19,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:19,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:23:19,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-27 20:23:19,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:23:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:23:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:23:19,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:19,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:19,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:19,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:19,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:19,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:19,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:23:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809665034] [2020-10-27 20:23:19,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:19,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:23:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269820835] [2020-10-27 20:23:19,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:23:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:23:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:19,739 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-10-27 20:23:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:20,263 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 20:23:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:23:20,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 20:23:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:20,266 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:23:20,266 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:23:20,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:23:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:23:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:23:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:23:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 20:23:20,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2020-10-27 20:23:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:20,276 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 20:23:20,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:23:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 20:23:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:23:20,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:20,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:20,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:23:20,279 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash 381500982, now seen corresponding path program 7 times [2020-10-27 20:23:20,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:20,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270209197] [2020-10-27 20:23:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:21,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:21,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:23:21,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:23:21,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:21,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:21,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:21,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:21,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:21,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:21,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:23:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270209197] [2020-10-27 20:23:21,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:23:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941976722] [2020-10-27 20:23:21,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:23:21,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:23:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:23:21,776 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2020-10-27 20:23:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:22,164 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-27 20:23:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:23:22,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 20:23:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:22,166 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:23:22,166 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:23:22,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:23:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-27 20:23:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:23:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 20:23:22,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2020-10-27 20:23:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:22,178 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 20:23:22,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:23:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 20:23:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:23:22,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:22,179 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:22,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:23:22,180 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:22,181 INFO L82 PathProgramCache]: Analyzing trace with hash 10965060, now seen corresponding path program 8 times [2020-10-27 20:23:22,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:22,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107101078] [2020-10-27 20:23:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:23:23,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:23:23,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:23:23,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:23,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:23,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:23,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:23,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:23,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:23,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:23:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107101078] [2020-10-27 20:23:23,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:23,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:23:23,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130075889] [2020-10-27 20:23:23,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:23:23,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:23,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:23:23,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:23,380 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 11 states. [2020-10-27 20:23:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:24,420 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-27 20:23:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:23:24,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-27 20:23:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:24,421 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:23:24,421 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:23:24,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:23:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:23:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 20:23:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:23:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 20:23:24,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-27 20:23:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:24,429 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 20:23:24,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:23:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 20:23:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:23:24,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:24,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:24,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:23:24,430 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 213670771, now seen corresponding path program 9 times [2020-10-27 20:23:24,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088241206] [2020-10-27 20:23:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:25,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:25,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:23:25,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:26,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:26,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:23:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088241206] [2020-10-27 20:23:26,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:26,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:23:26,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113474062] [2020-10-27 20:23:26,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:23:26,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:26,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:23:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:26,170 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-27 20:23:28,314 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 20:23:28,502 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-27 20:23:29,087 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 20:23:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:29,443 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-27 20:23:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:23:29,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 20:23:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:29,445 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:23:29,445 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:23:29,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:23:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:23:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 20:23:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:23:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 20:23:29,452 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-27 20:23:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:29,453 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 20:23:29,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:23:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 20:23:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:23:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:29,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:29,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:23:29,454 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:29,455 INFO L82 PathProgramCache]: Analyzing trace with hash -896804185, now seen corresponding path program 10 times [2020-10-27 20:23:29,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:29,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949184378] [2020-10-27 20:23:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:29,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:29,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:23:29,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:29,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 20:23:29,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:23:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:23:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:23:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:29,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:29,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:29,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:29,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:29,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:23:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:23:30,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949184378] [2020-10-27 20:23:30,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:30,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:23:30,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051863820] [2020-10-27 20:23:30,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:23:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:23:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:23:30,002 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-27 20:23:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:30,554 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 20:23:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:23:30,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:23:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:30,555 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:23:30,556 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:23:30,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:23:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:23:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-27 20:23:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:23:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-27 20:23:30,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2020-10-27 20:23:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:30,564 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-27 20:23:30,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:23:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-27 20:23:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:23:30,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:30,565 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:30,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:23:30,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash -961789453, now seen corresponding path program 11 times [2020-10-27 20:23:30,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:30,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628000384] [2020-10-27 20:23:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:30,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:32,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:32,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:23:32,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:32,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-27 20:23:32,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:23:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:23:32,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:23:32,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:33,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:33,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:33,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:33,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:33,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:23:33,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628000384] [2020-10-27 20:23:33,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:33,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:23:33,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050888804] [2020-10-27 20:23:33,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:23:33,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:23:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:23:33,050 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 13 states. [2020-10-27 20:23:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:34,295 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-27 20:23:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:23:34,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-27 20:23:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:34,297 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:23:34,297 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:23:34,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:23:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:23:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 20:23:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:23:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 20:23:34,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-10-27 20:23:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:34,311 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 20:23:34,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:23:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 20:23:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:23:34,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:34,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:34,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:23:34,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1901087494, now seen corresponding path program 12 times [2020-10-27 20:23:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:34,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656938982] [2020-10-27 20:23:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:34,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:36,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:36,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:23:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:23:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:36,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:36,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:36,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:23:36,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656938982] [2020-10-27 20:23:36,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:36,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:23:36,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056558114] [2020-10-27 20:23:36,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:23:36,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:23:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:23:36,911 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-10-27 20:23:37,857 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:23:38,710 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 20:23:38,993 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:23:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:39,284 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 20:23:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:23:39,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 20:23:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:39,286 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:23:39,286 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:23:39,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:23:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:23:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 20:23:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:23:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 20:23:39,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2020-10-27 20:23:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:39,296 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 20:23:39,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:23:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 20:23:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:23:39,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:39,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:39,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:23:39,297 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -126493324, now seen corresponding path program 13 times [2020-10-27 20:23:39,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:39,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676251214] [2020-10-27 20:23:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:39,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:23:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:23:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:23:39,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:39,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:39,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:39,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:39,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:39,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:23:39,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:23:39,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676251214] [2020-10-27 20:23:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:23:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596008826] [2020-10-27 20:23:39,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:23:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:23:39,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:23:39,945 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-27 20:23:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:40,516 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 20:23:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:23:40,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 20:23:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:40,518 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:23:40,518 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:23:40,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:23:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:23:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-27 20:23:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:23:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 20:23:40,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-27 20:23:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:40,527 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 20:23:40,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:23:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 20:23:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:23:40,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:40,528 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:40,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:23:40,529 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1443010758, now seen corresponding path program 14 times [2020-10-27 20:23:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:40,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611027785] [2020-10-27 20:23:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3126 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:23:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:43,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:43,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:23:43,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611027785] [2020-10-27 20:23:43,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:43,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:23:43,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126859891] [2020-10-27 20:23:43,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:23:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:23:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:43,987 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 15 states. [2020-10-27 20:23:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:45,643 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-27 20:23:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:23:45,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 20:23:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:45,644 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:23:45,645 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:23:45,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:23:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:23:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 20:23:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:23:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 20:23:45,661 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-10-27 20:23:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:45,661 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 20:23:45,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:23:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 20:23:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:23:45,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:45,665 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:45,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:23:45,665 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 982229651, now seen corresponding path program 15 times [2020-10-27 20:23:45,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:45,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143858435] [2020-10-27 20:23:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:49,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3650 [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:23:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:23:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:23:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:49,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:49,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:49,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:49,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:49,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:23:49,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:49,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:23:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143858435] [2020-10-27 20:23:49,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:49,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:23:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669832252] [2020-10-27 20:23:49,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:23:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:23:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:23:49,667 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-27 20:23:49,900 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 20:23:50,914 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:23:51,277 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 20:23:52,342 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 20:23:53,649 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 20:23:53,840 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:23:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:54,181 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-27 20:23:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:23:54,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-27 20:23:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:54,186 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:23:54,186 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:23:54,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:23:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:23:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 20:23:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:23:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 20:23:54,202 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 32 [2020-10-27 20:23:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:54,203 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 20:23:54,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:23:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 20:23:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:23:54,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:54,204 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:23:54,204 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1453684615, now seen corresponding path program 16 times [2020-10-27 20:23:54,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:54,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200838411] [2020-10-27 20:23:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:23:54,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:23:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:54,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:23:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:54,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:23:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:23:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:23:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:23:54,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200838411] [2020-10-27 20:23:54,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:23:54,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:23:54,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672173022] [2020-10-27 20:23:54,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:23:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:23:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:23:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:23:54,995 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-10-27 20:23:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:23:55,751 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 20:23:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:23:55,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 20:23:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:23:55,752 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:23:55,752 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:23:55,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:23:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:23:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-27 20:23:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:23:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 20:23:55,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-10-27 20:23:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:23:55,764 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 20:23:55,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:23:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 20:23:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:23:55,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:23:55,765 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:23:55,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:23:55,766 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:23:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:23:55,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1111080685, now seen corresponding path program 17 times [2020-10-27 20:23:55,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:23:55,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237272844] [2020-10-27 20:23:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:23:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:23:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:23:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4617 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:24:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:00,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:00,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:00,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:24:00,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237272844] [2020-10-27 20:24:00,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:00,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:24:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134266623] [2020-10-27 20:24:00,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:24:00,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:24:00,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:24:00,868 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 17 states. [2020-10-27 20:24:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:03,110 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-27 20:24:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:24:03,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-27 20:24:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:03,112 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:24:03,112 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:24:03,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:24:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:24:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 20:24:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:24:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 20:24:03,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2020-10-27 20:24:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:03,124 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 20:24:03,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:24:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 20:24:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:24:03,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:03,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:03,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:24:03,125 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:03,126 INFO L82 PathProgramCache]: Analyzing trace with hash 421965926, now seen corresponding path program 18 times [2020-10-27 20:24:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:03,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204314872] [2020-10-27 20:24:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:03,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:03,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:07,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:24:07,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3854 [2020-10-27 20:24:07,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:24:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:24:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:24:07,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:07,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:07,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:24:07,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204314872] [2020-10-27 20:24:07,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:07,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:24:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77283817] [2020-10-27 20:24:07,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:24:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:24:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:24:07,417 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2020-10-27 20:24:12,190 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 20:24:14,828 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 20:24:15,196 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 20:24:16,321 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:24:18,386 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 5))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= c_main_~y~0 .cse0) (<= .cse0 c_main_~y~0) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-27 20:24:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:19,089 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-27 20:24:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:24:19,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-27 20:24:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:19,091 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:24:19,091 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:24:19,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=166, Invalid=959, Unknown=1, NotChecked=64, Total=1190 [2020-10-27 20:24:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:24:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 20:24:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:24:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 20:24:19,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2020-10-27 20:24:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:19,102 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 20:24:19,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:24:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 20:24:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:24:19,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:19,103 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:19,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:24:19,103 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1265378324, now seen corresponding path program 19 times [2020-10-27 20:24:19,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:19,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495828029] [2020-10-27 20:24:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:19,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:24:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:24:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495828029] [2020-10-27 20:24:19,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:19,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:24:19,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599789651] [2020-10-27 20:24:19,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:24:19,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:24:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:24:19,973 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-27 20:24:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:20,867 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 20:24:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:24:20,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 20:24:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:20,872 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:24:20,872 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:24:20,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:24:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:24:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-27 20:24:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:24:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-27 20:24:20,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2020-10-27 20:24:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:20,883 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-27 20:24:20,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:24:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-27 20:24:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:24:20,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:20,883 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:20,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:24:20,884 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1641358886, now seen corresponding path program 20 times [2020-10-27 20:24:20,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:20,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842923454] [2020-10-27 20:24:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:25,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:24:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:24:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,048 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-10-27 20:24:28,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:28,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:28,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:28,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:28,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:24:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842923454] [2020-10-27 20:24:28,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:28,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:24:28,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507989448] [2020-10-27 20:24:28,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:24:28,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:24:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:24:28,585 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 19 states. [2020-10-27 20:24:30,633 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 20:24:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:31,473 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 20:24:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:24:31,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-27 20:24:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:31,480 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:24:31,480 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:24:31,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:24:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:24:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 20:24:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:24:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 20:24:31,500 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 37 [2020-10-27 20:24:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:31,500 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 20:24:31,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:24:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 20:24:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:24:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:31,501 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:31,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:24:31,503 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1656177259, now seen corresponding path program 21 times [2020-10-27 20:24:31,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:31,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522541517] [2020-10-27 20:24:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:31,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:31,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:36,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:36,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:24:36,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:36,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4594 [2020-10-27 20:24:36,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:24:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:24:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:24:36,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:36,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:36,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:24:36,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522541517] [2020-10-27 20:24:36,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:36,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:24:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995667095] [2020-10-27 20:24:36,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:24:36,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:24:36,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:24:36,616 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2020-10-27 20:24:41,912 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:24:45,698 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 20:24:46,769 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 20:24:50,076 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:24:51,056 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:24:53,750 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 20:24:55,833 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 7))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= .cse0 c_main_~y~0) (<= c_main_~y~0 .cse0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 7)) 4294967296)) 4294967301)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-27 20:24:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:56,729 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 20:24:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:24:56,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-27 20:24:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:56,730 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:24:56,730 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:24:56,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=226, Invalid=1335, Unknown=3, NotChecked=76, Total=1640 [2020-10-27 20:24:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:24:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 20:24:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:24:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 20:24:56,739 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 37 [2020-10-27 20:24:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 20:24:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:24:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 20:24:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:24:56,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:56,741 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:56,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:24:56,741 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1267449029, now seen corresponding path program 22 times [2020-10-27 20:24:56,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:56,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405230059] [2020-10-27 20:24:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:01,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:25:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:25:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:02,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:02,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:25:02,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405230059] [2020-10-27 20:25:02,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:02,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:25:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452968497] [2020-10-27 20:25:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:25:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:25:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:25:02,136 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-27 20:25:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:03,187 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-27 20:25:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:25:03,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 20:25:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:03,189 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:25:03,189 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:25:03,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:25:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:25:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-27 20:25:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:25:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-27 20:25:03,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2020-10-27 20:25:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:03,199 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-27 20:25:03,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:25:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-27 20:25:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:25:03,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:03,200 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:03,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:25:03,201 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1705550741, now seen corresponding path program 23 times [2020-10-27 20:25:03,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:03,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317012131] [2020-10-27 20:25:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:25:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:25:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:25:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:08,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:08,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:08,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:25:08,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317012131] [2020-10-27 20:25:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:08,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:25:08,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220144295] [2020-10-27 20:25:08,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:25:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:25:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:25:08,860 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 21 states. [2020-10-27 20:25:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:12,913 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-27 20:25:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:25:12,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-27 20:25:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:12,915 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:25:12,915 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:25:12,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:25:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:25:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 20:25:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:25:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 20:25:12,927 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-27 20:25:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:12,927 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 20:25:12,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:25:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 20:25:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:25:12,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:12,928 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:12,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:25:12,928 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1593537082, now seen corresponding path program 24 times [2020-10-27 20:25:12,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:12,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728484597] [2020-10-27 20:25:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:17,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:17,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:25:17,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:17,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:25:17,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:25:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:25:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:25:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:18,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:18,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:18,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:25:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728484597] [2020-10-27 20:25:18,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:18,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:25:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349478177] [2020-10-27 20:25:18,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:25:18,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:25:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:25:18,603 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2020-10-27 20:25:34,084 WARN L193 SmtUtils]: Spent 11.61 s on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 20:25:48,975 WARN L193 SmtUtils]: Spent 10.85 s on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 20:25:49,972 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 20:25:50,412 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:25:54,775 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:25:55,888 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:25:56,784 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 20:26:01,049 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 20:26:11,302 WARN L193 SmtUtils]: Spent 6.76 s on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 20:26:13,371 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 (- 1))) (.cse1 (+ c_main_~z~0 8))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 3 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967297) 4294967296)))) (<= 8 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967302) 4294967296)))) (<= 5 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967299) 4294967296)))) (<= 6 (+ (* 4294967296 (div (+ .cse0 4294967300) 4294967296)) c_main_~y~0)) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= 2 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967296) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= 4 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967298) 4294967296)))) (<= c_main_~y~0 .cse1) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 7 (+ c_main_~y~0 (* 4294967296 (div (+ .cse0 4294967301) 4294967296)))) (<= .cse1 c_main_~y~0) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-27 20:26:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:14,549 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 20:26:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:26:14,550 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-27 20:26:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:14,551 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:26:14,551 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:26:14,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=277, Invalid=1700, Unknown=7, NotChecked=86, Total=2070 [2020-10-27 20:26:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:26:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:26:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:26:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:26:14,562 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2020-10-27 20:26:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:14,563 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:26:14,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:26:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:26:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:26:14,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:14,563 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:14,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:26:14,564 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1085672780, now seen corresponding path program 25 times [2020-10-27 20:26:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:14,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002321146] [2020-10-27 20:26:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:15,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:26:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:16,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:16,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:16,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:16,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:16,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:26:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002321146] [2020-10-27 20:26:16,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:16,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:26:16,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723992367] [2020-10-27 20:26:16,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:26:16,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:26:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:26:16,014 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2020-10-27 20:26:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:17,336 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 20:26:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:26:17,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 20:26:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:17,337 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:26:17,337 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:26:17,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:26:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:26:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-10-27 20:26:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:26:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-27 20:26:17,346 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2020-10-27 20:26:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:17,346 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-27 20:26:17,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:26:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-27 20:26:17,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:26:17,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:17,347 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:17,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:26:17,347 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1773218694, now seen corresponding path program 26 times [2020-10-27 20:26:17,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:17,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482780315] [2020-10-27 20:26:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:26:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:26:22,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:26:22,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:23,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:23,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:26:23,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482780315] [2020-10-27 20:26:23,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:23,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:26:23,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521428695] [2020-10-27 20:26:23,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:26:23,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:23,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:26:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:26:23,186 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 23 states. [2020-10-27 20:26:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:27,012 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-27 20:26:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:26:27,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-27 20:26:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:27,014 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:26:27,014 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:26:27,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 20:26:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:26:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 20:26:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:26:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 20:26:27,025 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2020-10-27 20:26:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:27,025 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 20:26:27,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:26:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 20:26:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:26:27,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:27,026 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:27,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:26:27,026 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1400899795, now seen corresponding path program 27 times [2020-10-27 20:26:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:27,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368877114] [2020-10-27 20:26:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:32,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:32,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:26:32,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:32,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:26:32,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:26:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:26:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:26:32,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:32,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:32,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:32,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:32,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 20:26:32,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368877114] [2020-10-27 20:26:32,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:32,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:26:32,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362674016] [2020-10-27 20:26:32,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:26:32,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:26:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:26:32,888 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 23 states. [2020-10-27 20:26:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:35,294 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-27 20:26:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:26:35,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-27 20:26:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:35,296 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:26:35,296 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:26:35,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:26:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:26:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 20:26:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:26:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 20:26:35,304 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 44 [2020-10-27 20:26:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:35,304 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 20:26:35,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:26:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 20:26:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:26:35,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:35,308 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:35,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:26:35,309 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1547557191, now seen corresponding path program 28 times [2020-10-27 20:26:35,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:35,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454023379] [2020-10-27 20:26:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:36,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:26:36,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:36,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:36,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:36,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:36,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 20:26:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454023379] [2020-10-27 20:26:36,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:36,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:26:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176159089] [2020-10-27 20:26:36,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:26:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:26:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:26:36,884 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-27 20:26:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:38,216 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 20:26:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:26:38,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 20:26:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:38,217 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:26:38,218 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:26:38,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:26:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:26:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-10-27 20:26:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:26:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-27 20:26:38,227 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2020-10-27 20:26:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:38,227 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-27 20:26:38,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:26:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-27 20:26:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:26:38,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:38,229 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:38,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:26:38,230 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1798969171, now seen corresponding path program 29 times [2020-10-27 20:26:38,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:38,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994436094] [2020-10-27 20:26:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:43,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:26:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:26:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:26:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:44,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:44,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:44,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:44,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 20:26:44,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994436094] [2020-10-27 20:26:44,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:44,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:26:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897957903] [2020-10-27 20:26:44,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:26:44,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:26:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:26:44,197 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 25 states. [2020-10-27 20:26:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:48,796 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-27 20:26:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:26:48,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-27 20:26:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:48,798 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:26:48,798 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:26:48,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=282, Invalid=4274, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 20:26:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:26:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 20:26:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:26:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 20:26:48,810 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2020-10-27 20:26:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:48,810 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 20:26:48,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:26:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 20:26:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:26:48,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:48,811 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:48,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:26:48,811 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -30678234, now seen corresponding path program 30 times [2020-10-27 20:26:48,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:48,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807190497] [2020-10-27 20:26:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:48,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:53,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:26:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:54,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:54,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:54,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 20:26:54,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807190497] [2020-10-27 20:26:54,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:54,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:26:54,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670023898] [2020-10-27 20:26:54,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:26:54,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:26:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:26:54,740 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 25 states.