/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:27,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:27,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:27,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:27,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:27,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:27,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:27,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:27,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:27,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:27,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:27,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:27,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:27,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:27,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:27,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:27,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:27,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:27,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:27,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:27,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:27,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:27,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:27,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:27,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:27,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:27,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:27,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:27,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:27,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:27,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:27,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:27,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:27,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:27,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:27,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:27,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:27,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:27,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:27,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:27,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:27,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:18:27,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:27,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:27,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:27,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:27,653 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:27,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:27,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:27,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:27,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:27,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:27,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:27,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:27,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:27,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:27,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:27,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:27,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:27,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:27,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:27,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:27,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:27,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:27,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:27,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:27,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:27,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:27,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:27,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:27,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:27,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:28,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:28,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:28,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:28,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:28,163 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:28,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-27 14:18:28,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21526cb88/24e9e370c664485abd5394fbddb7b63f/FLAG040a8882a [2020-10-27 14:18:28,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:28,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2020-10-27 14:18:28,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21526cb88/24e9e370c664485abd5394fbddb7b63f/FLAG040a8882a [2020-10-27 14:18:29,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21526cb88/24e9e370c664485abd5394fbddb7b63f [2020-10-27 14:18:29,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:29,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:29,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:29,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:29,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:29,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a14bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29, skipping insertion in model container [2020-10-27 14:18:29,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:29,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:29,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:29,507 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:29,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:29,545 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:29,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29 WrapperNode [2020-10-27 14:18:29,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:29,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:29,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:29,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:29,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... [2020-10-27 14:18:29,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:29,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:29,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:29,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:29,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:29,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:30,282 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:30,283 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:18:30,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:30 BoogieIcfgContainer [2020-10-27 14:18:30,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:30,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:30,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:30,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:30,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:29" (1/3) ... [2020-10-27 14:18:30,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456ea00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:30, skipping insertion in model container [2020-10-27 14:18:30,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:29" (2/3) ... [2020-10-27 14:18:30,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456ea00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:30, skipping insertion in model container [2020-10-27 14:18:30,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:30" (3/3) ... [2020-10-27 14:18:30,300 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2020-10-27 14:18:30,313 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:30,319 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:18:30,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:18:30,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:18:30,378 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:18:30,378 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:18:30,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:18:30,379 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:18:30,379 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:18:30,379 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:18:30,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:18:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-27 14:18:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:18:30,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:30,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:30,418 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1399133640, now seen corresponding path program 1 times [2020-10-27 14:18:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:30,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384201421] [2020-10-27 14:18:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:18:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 14:18:30,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:18:30,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:18:30,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:31,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 14:18:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:31,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:18:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:31,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384201421] [2020-10-27 14:18:31,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:31,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:18:31,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407927977] [2020-10-27 14:18:31,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:18:31,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:31,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:18:31,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:18:31,060 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-27 14:18:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:31,192 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-27 14:18:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:18:31,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 14:18:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:31,203 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:18:31,203 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:18:31,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:18:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:18:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:18:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:18:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 14:18:31,251 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-10-27 14:18:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:31,252 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 14:18:31,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:18:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 14:18:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:18:31,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:31,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:18:31,255 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash -983817162, now seen corresponding path program 1 times [2020-10-27 14:18:31,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:31,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028570057] [2020-10-27 14:18:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:31,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:18:31,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 14:18:31,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:31,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:31,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:18:31,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:18:31,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:18:31,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:31,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:31,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:31,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 14:18:31,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028570057] [2020-10-27 14:18:31,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:31,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:18:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355818105] [2020-10-27 14:18:31,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:18:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:18:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:31,808 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-27 14:18:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:31,898 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-27 14:18:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:18:31,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 14:18:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:31,899 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:18:31,899 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:18:31,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:18:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 14:18:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:18:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:18:31,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-27 14:18:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:31,910 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:18:31,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:18:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:18:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:18:31,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:31,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:31,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:18:31,912 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1943183026, now seen corresponding path program 1 times [2020-10-27 14:18:31,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:31,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772743737] [2020-10-27 14:18:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:33,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:18:33,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:18:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:33,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:33,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:18:33,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:33,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:33,635 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 14:18:33,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772743737] [2020-10-27 14:18:33,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:33,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:18:33,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409864447] [2020-10-27 14:18:33,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:18:33,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:33,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:18:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:33,638 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:18:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:33,732 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-27 14:18:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:18:33,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 14:18:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:33,734 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:18:33,734 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:18:33,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:18:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-27 14:18:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:18:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 14:18:33,742 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-27 14:18:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:33,743 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 14:18:33,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:18:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 14:18:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:18:33,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:33,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:33,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:18:33,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1759275822, now seen corresponding path program 2 times [2020-10-27 14:18:33,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:33,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156444392] [2020-10-27 14:18:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:33,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:34,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:18:36,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:36,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2484 [2020-10-27 14:18:36,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:18:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:18:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:36,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:36,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:18:36,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:18:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156444392] [2020-10-27 14:18:36,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:18:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580006803] [2020-10-27 14:18:36,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:18:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:18:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:36,313 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 6 states. [2020-10-27 14:18:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:36,425 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-27 14:18:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:18:36,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 14:18:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:36,427 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:18:36,427 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:18:36,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:18:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 14:18:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:18:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 14:18:36,436 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-27 14:18:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:36,436 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 14:18:36,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:18:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 14:18:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:18:36,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:36,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:36,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:18:36,438 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash -150697558, now seen corresponding path program 3 times [2020-10-27 14:18:36,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:36,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075775209] [2020-10-27 14:18:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:41,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:41,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:18:41,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:41,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:18:41,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:41,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:18:41,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:18:41,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:18:41,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:41,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:41,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:41,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:41,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:41,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:41,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:41,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:41,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:41,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:41,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:18:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075775209] [2020-10-27 14:18:41,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:41,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:18:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472022338] [2020-10-27 14:18:41,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:18:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:18:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:18:41,545 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2020-10-27 14:18:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:41,672 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-27 14:18:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:18:41,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 14:18:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:41,673 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:18:41,673 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:18:41,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:18:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:18:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 14:18:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:18:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-27 14:18:41,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2020-10-27 14:18:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:41,681 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-27 14:18:41,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:18:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-27 14:18:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:18:41,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:41,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:41,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:18:41,683 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 576059942, now seen corresponding path program 4 times [2020-10-27 14:18:41,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:41,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226679391] [2020-10-27 14:18:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:41,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:46,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:18:46,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:18:46,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:18:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:18:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:18:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:46,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:46,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:46,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:18:46,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:18:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226679391] [2020-10-27 14:18:46,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:46,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:18:46,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894776881] [2020-10-27 14:18:46,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:18:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:18:46,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:18:46,810 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-10-27 14:18:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:46,980 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-27 14:18:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:18:46,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 14:18:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:46,983 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:18:46,984 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:18:46,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:18:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:18:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-27 14:18:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:18:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-27 14:18:46,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2020-10-27 14:18:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:46,999 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-27 14:18:46,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:18:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-27 14:18:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:18:47,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:47,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:47,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:18:47,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash 542882978, now seen corresponding path program 5 times [2020-10-27 14:18:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:47,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249985996] [2020-10-27 14:18:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:47,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:52,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:18:52,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:52,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:18:52,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:18:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:18:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:18:52,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:52,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:52,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:52,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:52,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:52,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:18:52,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:52,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:52,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:52,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:18:52,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249985996] [2020-10-27 14:18:52,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:52,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:18:52,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070613710] [2020-10-27 14:18:52,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:18:52,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:52,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:18:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:18:52,132 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 9 states. [2020-10-27 14:18:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:52,267 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-27 14:18:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:18:52,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 14:18:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:52,269 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:18:52,269 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:18:52,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:18:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:18:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 14:18:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:18:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-27 14:18:52,277 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2020-10-27 14:18:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:52,277 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-27 14:18:52,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:18:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-27 14:18:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:18:52,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:52,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:52,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:18:52,279 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash -668937954, now seen corresponding path program 6 times [2020-10-27 14:18:52,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:52,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913645082] [2020-10-27 14:18:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:57,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:18:57,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:18:57,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:18:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:18:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:18:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:18:57,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:57,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:57,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:18:57,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:57,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:57,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:57,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:57,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:18:57,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913645082] [2020-10-27 14:18:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:18:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073230708] [2020-10-27 14:18:57,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:18:57,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:18:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:18:57,439 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 10 states. [2020-10-27 14:18:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:57,596 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-27 14:18:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:18:57,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 14:18:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:57,599 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:18:57,600 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:18:57,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:18:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:18:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-27 14:18:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:18:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-27 14:18:57,612 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2020-10-27 14:18:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:57,613 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-27 14:18:57,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:18:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-27 14:18:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:18:57,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:57,616 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:57,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:18:57,616 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1647327130, now seen corresponding path program 7 times [2020-10-27 14:18:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:57,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598237293] [2020-10-27 14:18:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:57,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:02,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:02,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:02,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:02,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:02,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:02,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:19:02,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598237293] [2020-10-27 14:19:02,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:02,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:02,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387084684] [2020-10-27 14:19:02,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:02,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:02,770 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 11 states. [2020-10-27 14:19:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:02,946 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-27 14:19:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:02,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-27 14:19:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:02,947 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:19:02,948 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:19:02,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:19:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-27 14:19:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:19:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-27 14:19:02,955 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2020-10-27 14:19:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:02,956 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-27 14:19:02,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-27 14:19:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:19:02,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:02,957 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:02,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:02,957 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2003505130, now seen corresponding path program 8 times [2020-10-27 14:19:02,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:02,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121319351] [2020-10-27 14:19:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:02,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:19:08,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-27 14:19:08,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:19:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:08,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:08,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:08,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:19:08,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121319351] [2020-10-27 14:19:08,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:08,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:08,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602526375] [2020-10-27 14:19:08,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:08,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:08,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:08,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:08,182 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2020-10-27 14:19:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:08,405 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-27 14:19:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:08,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 14:19:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:08,406 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:19:08,407 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:19:08,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:19:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-27 14:19:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:19:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-27 14:19:08,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 51 [2020-10-27 14:19:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:08,428 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-27 14:19:08,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-27 14:19:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:19:08,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:08,429 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:08,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:08,430 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1188690578, now seen corresponding path program 9 times [2020-10-27 14:19:08,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:08,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739121731] [2020-10-27 14:19:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:13,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:13,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:13,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:13,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:19:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739121731] [2020-10-27 14:19:13,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:13,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:13,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463257918] [2020-10-27 14:19:13,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:13,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:13,619 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 13 states. [2020-10-27 14:19:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:13,756 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-27 14:19:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:13,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 14:19:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:13,757 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:19:13,757 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:19:13,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:19:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-27 14:19:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:19:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-27 14:19:13,771 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2020-10-27 14:19:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:13,771 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-27 14:19:13,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-27 14:19:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:19:13,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:13,776 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:13,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:19:13,776 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1242191630, now seen corresponding path program 10 times [2020-10-27 14:19:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:13,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125106450] [2020-10-27 14:19:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:18,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:19:18,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:18,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:18,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:18,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:18,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:19:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125106450] [2020-10-27 14:19:18,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:18,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957921192] [2020-10-27 14:19:18,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:18,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:18,974 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 14 states. [2020-10-27 14:19:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:19,162 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-27 14:19:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:19:19,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-27 14:19:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:19,164 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:19:19,164 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:19:19,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:19:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-27 14:19:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:19:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-27 14:19:19,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2020-10-27 14:19:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:19,179 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-27 14:19:19,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:19:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-27 14:19:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:19:19,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:19,181 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:19,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:19:19,184 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1890649482, now seen corresponding path program 11 times [2020-10-27 14:19:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:19,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962537224] [2020-10-27 14:19:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:19:24,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:24,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:24,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 14:19:24,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962537224] [2020-10-27 14:19:24,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:24,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:19:24,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100211460] [2020-10-27 14:19:24,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:19:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:19:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:24,402 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2020-10-27 14:19:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:24,600 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-27 14:19:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:19:24,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-27 14:19:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:24,602 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:19:24,602 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:19:24,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:19:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-27 14:19:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:19:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-27 14:19:24,608 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2020-10-27 14:19:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:24,608 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-27 14:19:24,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:19:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-27 14:19:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:19:24,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:24,610 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:24,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:19:24,610 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1255736838, now seen corresponding path program 12 times [2020-10-27 14:19:24,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:24,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527601372] [2020-10-27 14:19:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:19:29,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:19:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:29,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:19:29,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527601372] [2020-10-27 14:19:29,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:29,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:19:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069248767] [2020-10-27 14:19:29,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:19:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:19:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:29,819 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 16 states. [2020-10-27 14:19:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:29,986 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-27 14:19:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:19:29,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-27 14:19:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:29,988 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:19:29,988 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 14:19:29,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 14:19:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-27 14:19:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:19:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-27 14:19:29,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2020-10-27 14:19:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:29,998 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-27 14:19:29,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:19:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-27 14:19:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:19:29,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:29,998 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:29,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:19:29,999 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1710401406, now seen corresponding path program 13 times [2020-10-27 14:19:29,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:30,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664561392] [2020-10-27 14:19:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:19:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:19:35,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:19:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:35,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:35,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:35,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:19:35,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:35,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 14:19:35,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664561392] [2020-10-27 14:19:35,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:35,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:19:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408662093] [2020-10-27 14:19:35,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:19:35,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:19:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:19:35,227 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 17 states. [2020-10-27 14:19:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:35,502 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-27 14:19:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:19:35,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-27 14:19:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:35,504 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:19:35,504 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:19:35,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:19:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:19:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-27 14:19:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:19:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-27 14:19:35,511 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 71 [2020-10-27 14:19:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:35,512 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-27 14:19:35,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:19:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-27 14:19:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:19:35,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:35,513 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:35,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:19:35,513 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash -782697218, now seen corresponding path program 14 times [2020-10-27 14:19:35,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:35,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231625349] [2020-10-27 14:19:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:19:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:19:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:40,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:40,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:40,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:40,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:40,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:40,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:40,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:40,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:40,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:40,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:40,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 14:19:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231625349] [2020-10-27 14:19:40,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:40,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:19:40,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97126757] [2020-10-27 14:19:40,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:19:40,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:19:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:19:40,753 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 18 states. [2020-10-27 14:19:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:40,982 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-27 14:19:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:19:40,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-27 14:19:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:40,983 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:19:40,984 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:19:40,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:19:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:19:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-27 14:19:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:19:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-27 14:19:40,991 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 75 [2020-10-27 14:19:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:40,992 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-27 14:19:40,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:19:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-27 14:19:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:19:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:40,993 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:40,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:19:40,993 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1790512262, now seen corresponding path program 15 times [2020-10-27 14:19:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:40,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779044157] [2020-10-27 14:19:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:19:46,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:46,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 14:19:46,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779044157] [2020-10-27 14:19:46,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:46,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:19:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983215593] [2020-10-27 14:19:46,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:19:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:19:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:19:46,255 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 19 states. [2020-10-27 14:19:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:46,497 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-27 14:19:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:19:46,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-27 14:19:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:46,499 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:19:46,499 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:19:46,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:19:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:19:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-27 14:19:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:19:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-27 14:19:46,506 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 79 [2020-10-27 14:19:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:46,506 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-27 14:19:46,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:19:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-27 14:19:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:19:46,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:46,507 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:46,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:19:46,508 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1004682230, now seen corresponding path program 16 times [2020-10-27 14:19:46,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:46,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494020481] [2020-10-27 14:19:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:51,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:19:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:51,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:51,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 14:19:51,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494020481] [2020-10-27 14:19:51,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:51,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:19:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010980733] [2020-10-27 14:19:51,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:19:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:19:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:19:51,858 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 20 states. [2020-10-27 14:19:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:52,149 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-27 14:19:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:19:52,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-27 14:19:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:52,150 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:19:52,150 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:19:52,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:19:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:19:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-27 14:19:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:19:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-27 14:19:52,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 83 [2020-10-27 14:19:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-27 14:19:52,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:19:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-27 14:19:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:19:52,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:52,158 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:52,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:19:52,159 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1286985330, now seen corresponding path program 17 times [2020-10-27 14:19:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:52,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463203532] [2020-10-27 14:19:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:52,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:19:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:57,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:57,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:57,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:57,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 14:19:57,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463203532] [2020-10-27 14:19:57,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:57,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:19:57,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782911394] [2020-10-27 14:19:57,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:19:57,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:19:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:19:57,467 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 21 states. [2020-10-27 14:19:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:57,713 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-27 14:19:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:19:57,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-27 14:19:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:57,715 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:19:57,715 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:19:57,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:19:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:19:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-27 14:19:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:19:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-27 14:19:57,728 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2020-10-27 14:19:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:57,728 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-27 14:19:57,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:19:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-27 14:19:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:19:57,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:57,730 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:57,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:19:57,730 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash 13419246, now seen corresponding path program 18 times [2020-10-27 14:19:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:57,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407974134] [2020-10-27 14:19:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:02,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:02,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:03,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:20:03,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407974134] [2020-10-27 14:20:03,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:03,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800616848] [2020-10-27 14:20:03,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:03,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:03,075 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 22 states. [2020-10-27 14:20:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:03,389 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-27 14:20:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:03,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-10-27 14:20:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:03,390 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:20:03,391 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:20:03,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:20:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-27 14:20:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:20:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-27 14:20:03,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 91 [2020-10-27 14:20:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:03,398 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-27 14:20:03,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-27 14:20:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:20:03,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:03,399 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:03,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:03,400 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1028521622, now seen corresponding path program 19 times [2020-10-27 14:20:03,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:03,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858382490] [2020-10-27 14:20:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:03,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:08,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:08,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:08,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:08,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:08,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:08,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:08,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:08,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:08,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:08,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 14:20:08,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858382490] [2020-10-27 14:20:08,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:08,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:08,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680446190] [2020-10-27 14:20:08,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:08,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:08,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:08,806 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 23 states. [2020-10-27 14:20:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:09,067 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-10-27 14:20:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:09,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-27 14:20:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:09,069 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:20:09,069 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:20:09,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:20:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-27 14:20:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:20:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-27 14:20:09,076 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 95 [2020-10-27 14:20:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:09,077 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-27 14:20:09,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-27 14:20:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:20:09,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:09,078 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:09,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:20:09,078 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1368354330, now seen corresponding path program 20 times [2020-10-27 14:20:09,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:09,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6348780] [2020-10-27 14:20:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:09,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:20:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:14,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:14,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:14,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:14,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 14:20:14,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6348780] [2020-10-27 14:20:14,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:14,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:20:14,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929057751] [2020-10-27 14:20:14,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:20:14,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:14,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:20:14,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:14,437 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 24 states. [2020-10-27 14:20:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:14,732 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-10-27 14:20:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:20:14,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-27 14:20:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:14,737 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:20:14,737 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:20:14,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:20:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-27 14:20:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 14:20:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-27 14:20:14,748 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 99 [2020-10-27 14:20:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:14,748 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-27 14:20:14,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:20:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-27 14:20:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:20:14,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:14,750 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:14,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:20:14,751 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash 294876258, now seen corresponding path program 21 times [2020-10-27 14:20:14,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:14,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632855306] [2020-10-27 14:20:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:14,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:19,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:20:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:20:19,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:20:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:20:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:20:19,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:20,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:20,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:20,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:20,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:20,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:20,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 14:20:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632855306] [2020-10-27 14:20:20,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:20,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:20:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726089104] [2020-10-27 14:20:20,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:20:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:20:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:20,146 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 25 states. [2020-10-27 14:20:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:20,385 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2020-10-27 14:20:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:20:20,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-27 14:20:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:20,387 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:20:20,388 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 14:20:20,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 14:20:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-27 14:20:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:20:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-27 14:20:20,395 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 103 [2020-10-27 14:20:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:20,396 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-27 14:20:20,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:20:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-27 14:20:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 14:20:20,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:20,397 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:20,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:20:20,397 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash -349853474, now seen corresponding path program 22 times [2020-10-27 14:20:20,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:20,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021899581] [2020-10-27 14:20:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:20,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:20:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:25,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 14:20:25,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021899581] [2020-10-27 14:20:25,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:25,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:20:25,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252012001] [2020-10-27 14:20:25,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:20:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:20:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:25,798 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 26 states. [2020-10-27 14:20:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:26,057 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2020-10-27 14:20:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:20:26,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-27 14:20:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:26,059 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:20:26,060 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 14:20:26,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 14:20:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-27 14:20:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:20:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-27 14:20:26,068 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2020-10-27 14:20:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:26,068 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-27 14:20:26,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:20:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-27 14:20:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:20:26,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:26,070 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:26,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:20:26,070 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1806839642, now seen corresponding path program 23 times [2020-10-27 14:20:26,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:26,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281373314] [2020-10-27 14:20:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:26,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:20:31,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:31,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:31,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:31,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:31,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:31,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:31,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:31,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:31,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:31,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 14:20:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281373314] [2020-10-27 14:20:31,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:31,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:20:31,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170525094] [2020-10-27 14:20:31,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:20:31,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:20:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:20:31,618 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 27 states. [2020-10-27 14:20:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:31,981 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2020-10-27 14:20:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:20:31,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 111 [2020-10-27 14:20:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:31,983 INFO L225 Difference]: With dead ends: 184 [2020-10-27 14:20:31,983 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 14:20:31,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:20:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 14:20:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-27 14:20:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:20:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-27 14:20:31,991 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 111 [2020-10-27 14:20:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:31,991 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-27 14:20:31,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:20:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-27 14:20:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:20:31,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:31,992 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:31,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:20:31,992 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1967392726, now seen corresponding path program 24 times [2020-10-27 14:20:31,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:31,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179652601] [2020-10-27 14:20:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:32,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:32,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:20:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:37,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:37,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:37,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:37,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 14:20:37,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179652601] [2020-10-27 14:20:37,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:37,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:20:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065058826] [2020-10-27 14:20:37,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:20:37,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:20:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:20:37,515 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 28 states. [2020-10-27 14:20:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:37,873 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2020-10-27 14:20:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:20:37,874 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 115 [2020-10-27 14:20:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:37,875 INFO L225 Difference]: With dead ends: 190 [2020-10-27 14:20:37,875 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:20:37,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:20:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:20:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-27 14:20:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 14:20:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-10-27 14:20:37,883 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 115 [2020-10-27 14:20:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:37,883 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-10-27 14:20:37,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:20:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-10-27 14:20:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:20:37,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:37,885 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:37,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:20:37,885 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash 459682386, now seen corresponding path program 25 times [2020-10-27 14:20:37,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:37,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017455812] [2020-10-27 14:20:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:20:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:20:43,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:43,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:43,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:43,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 14:20:43,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017455812] [2020-10-27 14:20:43,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:43,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:20:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232186991] [2020-10-27 14:20:43,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:20:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:20:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:20:43,481 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 29 states. [2020-10-27 14:20:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:43,823 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2020-10-27 14:20:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:20:43,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-27 14:20:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:43,825 INFO L225 Difference]: With dead ends: 196 [2020-10-27 14:20:43,825 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:20:43,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:20:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:20:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-27 14:20:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:20:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-27 14:20:43,844 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 119 [2020-10-27 14:20:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:43,844 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-27 14:20:43,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:20:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-27 14:20:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:20:43,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:43,848 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:43,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:20:43,849 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash 589541070, now seen corresponding path program 26 times [2020-10-27 14:20:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:43,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023283100] [2020-10-27 14:20:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:43,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:48,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:20:48,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:20:48,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:49,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:49,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 14:20:49,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023283100] [2020-10-27 14:20:49,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:49,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:20:49,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69392505] [2020-10-27 14:20:49,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:20:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:20:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:20:49,401 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 30 states. [2020-10-27 14:20:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:49,782 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2020-10-27 14:20:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:20:49,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2020-10-27 14:20:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:49,784 INFO L225 Difference]: With dead ends: 202 [2020-10-27 14:20:49,784 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:20:49,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:20:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:20:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-27 14:20:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:20:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-27 14:20:49,793 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 123 [2020-10-27 14:20:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:49,793 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-27 14:20:49,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:20:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-27 14:20:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:20:49,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:49,795 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:49,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:20:49,795 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2096661174, now seen corresponding path program 27 times [2020-10-27 14:20:49,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:49,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788315663] [2020-10-27 14:20:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:54,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:20:54,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:20:54,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:55,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-27 14:20:55,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788315663] [2020-10-27 14:20:55,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:55,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:20:55,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471826679] [2020-10-27 14:20:55,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:20:55,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:20:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:20:55,418 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 31 states. [2020-10-27 14:20:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:55,867 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2020-10-27 14:20:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:20:55,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 127 [2020-10-27 14:20:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:55,869 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:20:55,869 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 14:20:55,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:20:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 14:20:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-27 14:20:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:20:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-27 14:20:55,880 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2020-10-27 14:20:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:55,880 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-27 14:20:55,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:20:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-27 14:20:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 14:20:55,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:55,883 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:55,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:20:55,883 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash -484663866, now seen corresponding path program 28 times [2020-10-27 14:20:55,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:55,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485556703] [2020-10-27 14:20:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:21:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:01,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:01,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:01,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:01,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:01,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:01,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:01,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:01,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:01,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 14:21:01,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485556703] [2020-10-27 14:21:01,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:01,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:21:01,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140041995] [2020-10-27 14:21:01,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:21:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:21:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:01,594 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 32 states. [2020-10-27 14:21:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:01,989 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2020-10-27 14:21:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:21:01,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-27 14:21:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:01,991 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:21:01,991 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 14:21:01,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 14:21:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-27 14:21:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:21:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-10-27 14:21:02,000 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 131 [2020-10-27 14:21:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:02,000 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-10-27 14:21:02,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:21:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-10-27 14:21:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:21:02,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:02,002 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:02,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:21:02,002 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 485363778, now seen corresponding path program 29 times [2020-10-27 14:21:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:02,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281753642] [2020-10-27 14:21:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:02,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:21:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:21:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:07,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:07,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-27 14:21:07,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281753642] [2020-10-27 14:21:07,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:07,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:21:07,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133950549] [2020-10-27 14:21:07,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:21:07,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:21:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:07,590 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 33 states. [2020-10-27 14:21:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:07,924 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2020-10-27 14:21:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:21:07,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-27 14:21:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:07,927 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:21:07,927 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 14:21:07,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 14:21:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-27 14:21:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 14:21:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-27 14:21:07,935 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 135 [2020-10-27 14:21:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:07,935 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-27 14:21:07,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:21:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-27 14:21:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:21:07,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:07,937 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:07,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:21:07,937 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1148791618, now seen corresponding path program 30 times [2020-10-27 14:21:07,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:07,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625774849] [2020-10-27 14:21:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:13,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:21:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-27 14:21:13,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:21:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:21:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:13,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:13,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 14:21:13,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625774849] [2020-10-27 14:21:13,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:13,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:21:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082895717] [2020-10-27 14:21:13,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:21:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:21:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:13,680 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 34 states. [2020-10-27 14:21:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:14,045 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2020-10-27 14:21:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:21:14,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 139 [2020-10-27 14:21:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:14,047 INFO L225 Difference]: With dead ends: 226 [2020-10-27 14:21:14,047 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:21:14,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:21:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-27 14:21:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 14:21:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2020-10-27 14:21:14,058 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 139 [2020-10-27 14:21:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:14,060 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2020-10-27 14:21:14,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:21:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2020-10-27 14:21:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:21:14,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:14,062 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:14,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:21:14,062 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2071063354, now seen corresponding path program 31 times [2020-10-27 14:21:14,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:14,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170238751] [2020-10-27 14:21:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:19,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:19,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:21:19,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:21:19,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:21:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:21:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:19,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:19,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:19,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:19,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:19,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:19,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:19,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:19,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-27 14:21:19,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170238751] [2020-10-27 14:21:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:21:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813337262] [2020-10-27 14:21:19,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:21:19,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:21:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:19,798 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 35 states. [2020-10-27 14:21:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:20,272 INFO L93 Difference]: Finished difference Result 232 states and 238 transitions. [2020-10-27 14:21:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:21:20,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2020-10-27 14:21:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:20,274 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:21:20,275 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 14:21:20,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 14:21:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-27 14:21:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:21:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-10-27 14:21:20,283 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 143 [2020-10-27 14:21:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:20,283 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-10-27 14:21:20,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:21:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-10-27 14:21:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 14:21:20,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:20,285 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:20,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:21:20,285 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -893758538, now seen corresponding path program 32 times [2020-10-27 14:21:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:20,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237404523] [2020-10-27 14:21:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:26,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:26,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:21:26,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:26,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6543 [2020-10-27 14:21:26,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:26,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:21:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:21:26,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:27,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:27,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 14:21:27,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237404523] [2020-10-27 14:21:27,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:27,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:21:27,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296926800] [2020-10-27 14:21:27,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:21:27,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:21:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:21:27,525 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 36 states. [2020-10-27 14:21:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:27,923 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2020-10-27 14:21:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:21:27,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 147 [2020-10-27 14:21:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:27,926 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:21:27,926 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 14:21:27,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:21:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 14:21:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-27 14:21:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 14:21:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-27 14:21:27,936 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2020-10-27 14:21:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:27,936 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-27 14:21:27,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:21:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-27 14:21:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 14:21:27,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:27,937 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:27,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:21:27,938 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1223364146, now seen corresponding path program 33 times [2020-10-27 14:21:27,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:27,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704520976] [2020-10-27 14:21:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:27,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:33,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:21:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:33,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:33,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-27 14:21:33,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704520976] [2020-10-27 14:21:33,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:33,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:21:33,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023657683] [2020-10-27 14:21:33,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:21:33,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:21:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:21:33,829 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 37 states. [2020-10-27 14:21:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:34,334 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2020-10-27 14:21:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:21:34,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 151 [2020-10-27 14:21:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:34,336 INFO L225 Difference]: With dead ends: 244 [2020-10-27 14:21:34,336 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 14:21:34,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:21:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 14:21:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-27 14:21:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:21:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2020-10-27 14:21:34,344 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 151 [2020-10-27 14:21:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:34,345 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2020-10-27 14:21:34,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:21:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2020-10-27 14:21:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:21:34,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:34,346 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:34,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:21:34,346 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1192172206, now seen corresponding path program 34 times [2020-10-27 14:21:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:34,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111444402] [2020-10-27 14:21:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:39,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 14:21:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:40,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 14:21:40,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111444402] [2020-10-27 14:21:40,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:40,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:21:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409500978] [2020-10-27 14:21:40,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:21:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:21:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:21:40,268 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand 38 states. [2020-10-27 14:21:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:40,625 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2020-10-27 14:21:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:21:40,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 155 [2020-10-27 14:21:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:40,627 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:21:40,627 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 14:21:40,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:21:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 14:21:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-27 14:21:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:21:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2020-10-27 14:21:40,635 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 155 [2020-10-27 14:21:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:40,636 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2020-10-27 14:21:40,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:21:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2020-10-27 14:21:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:21:40,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:40,637 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:40,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:21:40,637 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1202813226, now seen corresponding path program 35 times [2020-10-27 14:21:40,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:40,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786718272] [2020-10-27 14:21:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:40,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:45,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:21:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:46,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:46,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:46,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-27 14:21:46,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786718272] [2020-10-27 14:21:46,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:46,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:21:46,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695694927] [2020-10-27 14:21:46,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:21:46,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:21:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:21:46,559 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 39 states. [2020-10-27 14:21:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:47,021 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2020-10-27 14:21:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:21:47,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 159 [2020-10-27 14:21:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:47,024 INFO L225 Difference]: With dead ends: 256 [2020-10-27 14:21:47,024 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:21:47,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:21:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:21:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-27 14:21:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 14:21:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2020-10-27 14:21:47,032 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 159 [2020-10-27 14:21:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2020-10-27 14:21:47,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:21:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2020-10-27 14:21:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:21:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:47,034 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:47,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:21:47,034 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2128423334, now seen corresponding path program 36 times [2020-10-27 14:21:47,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:47,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416522525] [2020-10-27 14:21:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:52,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:21:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:52,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:52,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:52,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-27 14:21:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416522525] [2020-10-27 14:21:52,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:52,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:21:52,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122575050] [2020-10-27 14:21:52,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:21:52,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:52,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:21:52,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:21:52,995 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand 40 states. [2020-10-27 14:21:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:53,537 INFO L93 Difference]: Finished difference Result 262 states and 268 transitions. [2020-10-27 14:21:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:21:53,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 163 [2020-10-27 14:21:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:53,539 INFO L225 Difference]: With dead ends: 262 [2020-10-27 14:21:53,540 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 14:21:53,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:21:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 14:21:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-27 14:21:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:21:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2020-10-27 14:21:53,548 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 163 [2020-10-27 14:21:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:53,548 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2020-10-27 14:21:53,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:21:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2020-10-27 14:21:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 14:21:53,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:53,549 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:53,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:21:53,550 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1377643554, now seen corresponding path program 37 times [2020-10-27 14:21:53,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:53,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198448523] [2020-10-27 14:21:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:21:58,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:59,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-27 14:21:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198448523] [2020-10-27 14:21:59,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:59,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:21:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727074848] [2020-10-27 14:21:59,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:21:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:21:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:21:59,705 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand 41 states. [2020-10-27 14:22:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:00,277 INFO L93 Difference]: Finished difference Result 268 states and 274 transitions. [2020-10-27 14:22:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:22:00,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 167 [2020-10-27 14:22:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:00,279 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:22:00,279 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 14:22:00,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:22:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 14:22:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-27 14:22:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 14:22:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-10-27 14:22:00,288 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2020-10-27 14:22:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:00,288 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-10-27 14:22:00,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:22:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-10-27 14:22:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 14:22:00,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:00,289 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:00,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:22:00,290 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -662929250, now seen corresponding path program 38 times [2020-10-27 14:22:00,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:00,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76603231] [2020-10-27 14:22:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 14:22:05,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:22:05,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-27 14:22:05,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:22:05,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:22:05,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:22:05,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:06,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:06,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:06,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:06,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-27 14:22:06,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76603231] [2020-10-27 14:22:06,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:06,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:22:06,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147859573] [2020-10-27 14:22:06,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:22:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:22:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:22:06,438 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 42 states. [2020-10-27 14:22:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:07,009 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2020-10-27 14:22:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:22:07,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 171 [2020-10-27 14:22:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:07,011 INFO L225 Difference]: With dead ends: 274 [2020-10-27 14:22:07,011 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 14:22:07,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:22:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 14:22:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-27 14:22:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 14:22:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2020-10-27 14:22:07,020 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 171 [2020-10-27 14:22:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:07,020 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2020-10-27 14:22:07,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:22:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2020-10-27 14:22:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:22:07,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:07,021 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:07,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:22:07,022 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:07,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1518741274, now seen corresponding path program 39 times [2020-10-27 14:22:07,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:07,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401426996] [2020-10-27 14:22:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:12,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:22:12,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:13,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-27 14:22:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401426996] [2020-10-27 14:22:13,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:13,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:22:13,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597169471] [2020-10-27 14:22:13,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:22:13,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:13,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:22:13,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:22:13,092 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand 43 states. [2020-10-27 14:22:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:13,564 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2020-10-27 14:22:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:22:13,565 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 175 [2020-10-27 14:22:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:13,567 INFO L225 Difference]: With dead ends: 280 [2020-10-27 14:22:13,567 INFO L226 Difference]: Without dead ends: 187 [2020-10-27 14:22:13,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:22:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-27 14:22:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-27 14:22:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-27 14:22:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2020-10-27 14:22:13,576 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 175 [2020-10-27 14:22:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:13,576 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2020-10-27 14:22:13,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:22:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2020-10-27 14:22:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 14:22:13,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:13,578 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:13,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:22:13,578 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -767221866, now seen corresponding path program 40 times [2020-10-27 14:22:13,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:13,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301583699] [2020-10-27 14:22:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:18,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 14:22:18,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 14:22:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:19,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:19,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-27 14:22:19,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301583699] [2020-10-27 14:22:19,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:19,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:22:19,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528727294] [2020-10-27 14:22:19,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:22:19,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:22:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:22:19,794 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand 44 states. [2020-10-27 14:22:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:20,408 INFO L93 Difference]: Finished difference Result 286 states and 292 transitions. [2020-10-27 14:22:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:22:20,408 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-10-27 14:22:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:20,410 INFO L225 Difference]: With dead ends: 286 [2020-10-27 14:22:20,410 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:22:20,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:22:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:22:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-10-27 14:22:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:22:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2020-10-27 14:22:20,418 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 179 [2020-10-27 14:22:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:20,418 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2020-10-27 14:22:20,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:22:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2020-10-27 14:22:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:22:20,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:20,420 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:20,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:22:20,420 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1799645714, now seen corresponding path program 41 times [2020-10-27 14:22:20,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:20,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125422759] [2020-10-27 14:22:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking...