/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:36,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:36,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:36,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:36,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:36,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:36,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:36,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:01:36,519 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:36,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:36,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:36,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:36,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:36,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:36,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:36,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:36,523 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:36,523 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:36,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:36,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:36,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:36,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:36,885 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:36,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2021-05-02 23:01:36,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b903e08a/01939a2acba648759aeedb863596ff89/FLAG4a54a3490 [2021-05-02 23:01:37,328 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:37,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2021-05-02 23:01:37,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b903e08a/01939a2acba648759aeedb863596ff89/FLAG4a54a3490 [2021-05-02 23:01:37,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b903e08a/01939a2acba648759aeedb863596ff89 [2021-05-02 23:01:37,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:37,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:37,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:37,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:37,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:37,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@207cafdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:37,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:37,500 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2021-05-02 23:01:37,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,576 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:37,591 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2021-05-02 23:01:37,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,628 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:37,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37 WrapperNode [2021-05-02 23:01:37,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:37,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:37,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:37,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:37,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:37,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:37,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:37,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:37,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-05-02 23:01:37,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:37,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:37,731 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:37,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:37,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:37,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:37,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:37,926 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 23:01:37,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:37 BoogieIcfgContainer [2021-05-02 23:01:37,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:37,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:37,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:37,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:37,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:37" (1/3) ... [2021-05-02 23:01:37,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41196712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (2/3) ... [2021-05-02 23:01:37,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41196712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:37" (3/3) ... [2021-05-02 23:01:37,932 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2021-05-02 23:01:37,936 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:37,938 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:37,948 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:37,961 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:37,962 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:37,962 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:37,962 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:37,962 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:37,962 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:37,962 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:37,962 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 23:01:37,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:37,975 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:37,975 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2021-05-02 23:01:37,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:37,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285855343] [2021-05-02 23:01:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,021 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:38,136 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:38,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285855343] [2021-05-02 23:01:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1285855343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:38,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:38,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:01:38,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631425831] [2021-05-02 23:01:38,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:01:38,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:01:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:38,149 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:38,200 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2021-05-02 23:01:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:01:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 23:01:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:38,206 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:01:38,206 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:01:38,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:01:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-05-02 23:01:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 23:01:38,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-05-02 23:01:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:38,234 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 23:01:38,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 23:01:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 23:01:38,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,236 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:38,237 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2021-05-02 23:01:38,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833695730] [2021-05-02 23:01:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:38,378 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833695730] [2021-05-02 23:01:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [833695730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:01:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131148825] [2021-05-02 23:01:38,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:01:38,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:01:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:01:38,382 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:38,508 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 23:01:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:01:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 23:01:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:38,511 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:01:38,511 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:01:38,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:01:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2021-05-02 23:01:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 23:01:38,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-05-02 23:01:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:38,522 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 23:01:38,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 23:01:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:01:38,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,523 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:38,524 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2021-05-02 23:01:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031324531] [2021-05-02 23:01:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,542 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:38,551 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:38,576 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:01:38,586 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:38,748 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031324531] [2021-05-02 23:01:38,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031324531] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:38,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:38,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:01:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942409404] [2021-05-02 23:01:38,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:01:38,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:01:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:38,750 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:38,886 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 23:01:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:01:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:01:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:38,887 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:01:38,887 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:01:38,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:01:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2021-05-02 23:01:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 23:01:38,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-05-02 23:01:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:38,891 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 23:01:38,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 23:01:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:38,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,891 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:38,892 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2021-05-02 23:01:38,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438988096] [2021-05-02 23:01:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,898 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:38,899 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:38,907 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:01:38,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:38,918 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:38,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-02 23:01:38,947 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:39,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:39,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438988096] [2021-05-02 23:01:39,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [438988096] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:39,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:39,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:01:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782735062] [2021-05-02 23:01:39,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:01:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:01:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:39,042 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:39,157 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 23:01:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:01:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:39,159 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:01:39,159 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:01:39,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:01:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-05-02 23:01:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 23:01:39,171 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-05-02 23:01:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:39,172 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 23:01:39,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 23:01:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:01:39,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:39,173 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:39,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:01:39,173 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2021-05-02 23:01:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:39,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572391240] [2021-05-02 23:01:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:39,739 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:01:39,749 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,750 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:39,751 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:39,768 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:01:39,782 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,784 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,787 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,788 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,790 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,793 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,818 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:39,819 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:39,841 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:01:39,853 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:39,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:45,995 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:01:45,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:48,033 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:01:48,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:48,037 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:48,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572391240] [2021-05-02 23:01:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [572391240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:48,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:48,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979303605] [2021-05-02 23:01:48,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=34, Unknown=1, NotChecked=0, Total=56 [2021-05-02 23:01:48,038 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:54,209 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 23:01:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:01:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:01:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:54,210 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:01:54,210 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:01:54,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10234.2ms TimeCoverageRelationStatistics Valid=39, Invalid=69, Unknown=2, NotChecked=0, Total=110 [2021-05-02 23:01:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:01:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2021-05-02 23:01:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 23:01:54,215 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-02 23:01:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:54,215 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 23:01:54,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 23:01:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:01:54,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:54,215 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:54,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:01:54,216 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2021-05-02 23:01:54,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:54,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393150308] [2021-05-02 23:01:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:55,796 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-05-02 23:01:57,172 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2021-05-02 23:01:57,182 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,182 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:57,184 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:57,199 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:01:57,212 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,215 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,216 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,217 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,220 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,234 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,235 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,236 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,238 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,239 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,240 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,241 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,243 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,244 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,245 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,246 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:57,258 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:57,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:57,285 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:01:57,299 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:57,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:57,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:03,482 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:02:03,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:05,513 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:02:05,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:13,595 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:02:13,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:15,642 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:02:15,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:15,646 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393150308] [2021-05-02 23:02:15,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [393150308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:15,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:15,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:02:15,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116447244] [2021-05-02 23:02:15,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:02:15,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:02:15,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=58, Unknown=3, NotChecked=0, Total=90 [2021-05-02 23:02:15,647 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:25,894 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-02 23:02:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:02:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:02:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:25,895 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:02:25,895 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:02:25,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20385.6ms TimeCoverageRelationStatistics Valid=47, Invalid=105, Unknown=4, NotChecked=0, Total=156 [2021-05-02 23:02:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:02:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-05-02 23:02:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 23:02:25,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-05-02 23:02:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:25,899 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 23:02:25,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 23:02:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:02:25,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:25,899 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:25,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:02:25,900 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 3 times [2021-05-02 23:02:25,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:25,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427720103] [2021-05-02 23:02:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:27,407 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2021-05-02 23:02:29,083 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2021-05-02 23:02:29,111 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,112 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:29,116 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:29,130 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:02:29,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,145 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,147 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,149 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,151 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,153 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,155 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,157 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,160 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,161 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,162 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,163 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,164 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,165 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,166 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,178 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:29,179 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:29,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:02:29,213 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:02:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:35,413 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:02:35,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:37,451 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:02:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:45,548 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:02:45,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:47,595 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:02:47,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:55,708 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-02 23:02:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:57,785 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:02:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:57,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:57,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427720103] [2021-05-02 23:02:57,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [427720103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:57,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:57,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:02:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090044759] [2021-05-02 23:02:57,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:02:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:02:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=90, Unknown=5, NotChecked=0, Total=132 [2021-05-02 23:02:57,790 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:12,135 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-05-02 23:03:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:03:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:03:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:12,137 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:03:12,137 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:03:12,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30617.1ms TimeCoverageRelationStatistics Valid=55, Invalid=149, Unknown=6, NotChecked=0, Total=210 [2021-05-02 23:03:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:03:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-05-02 23:03:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 23:03:12,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-05-02 23:03:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:12,142 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 23:03:12,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 23:03:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:03:12,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:12,142 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:12,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:03:12,143 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 4 times [2021-05-02 23:03:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:12,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465227310] [2021-05-02 23:03:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:12,803 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:03:13,455 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:03:13,469 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:03:13,470 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:13,491 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:03:13,506 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,507 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,509 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,510 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,511 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,512 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,513 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,514 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,530 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:03:13,531 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:13,558 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:03:13,575 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:03:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:13,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:13,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:19,733 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:03:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:21,780 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:03:21,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:29,874 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:03:29,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:31,927 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 23:03:31,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:40,050 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-05-02 23:03:40,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:42,108 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-02 23:03:42,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:50,255 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-02 23:03:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:52,338 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:03:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:52,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465227310] [2021-05-02 23:03:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465227310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:52,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:52,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:03:52,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034579802] [2021-05-02 23:03:52,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:03:52,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:03:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=130, Unknown=7, NotChecked=0, Total=182 [2021-05-02 23:03:52,342 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:10,867 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 23:04:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:04:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:04:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:10,869 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:04:10,869 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:04:10,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40854.8ms TimeCoverageRelationStatistics Valid=63, Invalid=201, Unknown=8, NotChecked=0, Total=272 [2021-05-02 23:04:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:04:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-05-02 23:04:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 23:04:10,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-05-02 23:04:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:10,874 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 23:04:10,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 23:04:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:04:10,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:10,875 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:10,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:04:10,875 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 5 times [2021-05-02 23:04:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:10,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723180934] [2021-05-02 23:04:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:13,677 WARN L205 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-02 23:04:16,050 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-02 23:04:16,069 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,070 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:04:16,071 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:04:16,101 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:04:16,123 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,126 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,128 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,130 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,132 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,134 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,136 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,137 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,139 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,141 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,146 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,148 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,150 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,152 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,154 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:16,190 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:04:16,191 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:04:16,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:04:16,257 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:04:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:16,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:16,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:22,480 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:04:22,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:24,528 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:04:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:32,645 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-02 23:04:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:34,710 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:04:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:42,849 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-05-02 23:04:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:44,919 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 23:04:44,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:53,056 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-05-02 23:04:53,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:55,142 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:04:55,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:03,332 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-05-02 23:05:03,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:05,460 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:05:05,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:05,465 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723180934] [2021-05-02 23:05:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723180934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:05,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:05,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:05:05,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787078750] [2021-05-02 23:05:05,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:05:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:05:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=178, Unknown=9, NotChecked=0, Total=240 [2021-05-02 23:05:05,466 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:28,181 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 23:05:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:05:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:05:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:28,183 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:05:28,183 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:05:28,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51312.0ms TimeCoverageRelationStatistics Valid=71, Invalid=261, Unknown=10, NotChecked=0, Total=342 [2021-05-02 23:05:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:05:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 23:05:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 23:05:28,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-02 23:05:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:28,188 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 23:05:28,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 23:05:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:05:28,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:28,189 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:28,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:05:28,189 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 6 times [2021-05-02 23:05:28,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:28,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524610507] [2021-05-02 23:05:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:29,833 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:05:31,071 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:05:31,091 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,091 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:05:31,092 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:05:31,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:05:31,134 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,136 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,138 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,139 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,141 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,142 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,145 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,147 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,148 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,149 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,151 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,152 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,153 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,155 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,156 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:31,176 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:05:31,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:05:31,211 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:05:31,232 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:05:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:31,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:31,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:37,433 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:05:37,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:39,480 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 23:05:39,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:47,599 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-02 23:05:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:49,661 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:05:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:57,845 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-02 23:05:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:59,917 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:05:59,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:08,090 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-05-02 23:06:08,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:10,212 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:06:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:18,398 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-05-02 23:06:18,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:20,531 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 102 [2021-05-02 23:06:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:28,922 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-05-02 23:06:28,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:31,118 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:06:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:31,124 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:31,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524610507] [2021-05-02 23:06:31,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524610507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:31,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:31,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:06:31,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048006069] [2021-05-02 23:06:31,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:06:31,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:06:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2021-05-02 23:06:31,125 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:58,478 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 23:06:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:06:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:06:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:58,482 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:06:58,482 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:06:58,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62018.8ms TimeCoverageRelationStatistics Valid=79, Invalid=329, Unknown=12, NotChecked=0, Total=420 [2021-05-02 23:06:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:06:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-05-02 23:06:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 23:06:58,510 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-02 23:06:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:58,510 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 23:06:58,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 23:06:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:06:58,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:58,511 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:58,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:06:58,511 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 7 times [2021-05-02 23:06:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:58,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137795152] [2021-05-02 23:06:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:00,025 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:07:02,124 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:07:02,156 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,156 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:07:02,158 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:07:02,195 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:07:02,226 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,229 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,233 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,235 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,238 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,242 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,245 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,247 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,252 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,258 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,260 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,263 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,266 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,268 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:02,302 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:07:02,304 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:07:02,352 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:07:02,387 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:07:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:02,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:02,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:08,707 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:07:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:10,794 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:07:10,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:18,975 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:07:18,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:21,056 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:07:21,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:29,231 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-05-02 23:07:29,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:31,344 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:07:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:39,631 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-02 23:07:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:41,784 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:07:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:50,043 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-05-02 23:07:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:52,193 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:07:52,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:00,486 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-05-02 23:08:00,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:02,683 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:08:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:11,031 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-05-02 23:08:11,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:13,293 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 106 [2021-05-02 23:08:13,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:13,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:13,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137795152] [2021-05-02 23:08:13,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137795152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:13,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:13,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:08:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582827597] [2021-05-02 23:08:13,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:08:13,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:08:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=298, Unknown=13, NotChecked=0, Total=380 [2021-05-02 23:08:13,305 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:45,767 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 23:08:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:08:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:08:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:45,773 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:08:45,773 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:08:45,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73159.7ms TimeCoverageRelationStatistics Valid=87, Invalid=405, Unknown=14, NotChecked=0, Total=506 [2021-05-02 23:08:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:08:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 23:08:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 23:08:45,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2021-05-02 23:08:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:45,793 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 23:08:45,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 23:08:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:08:45,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:45,794 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:45,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:08:45,794 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 8 times [2021-05-02 23:08:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:45,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004925397] [2021-05-02 23:08:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:49,667 WARN L205 SmtUtils]: Spent 3.77 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:08:52,176 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:08:52,228 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,229 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:08:52,231 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:08:52,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:08:52,332 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,336 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,339 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,346 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,349 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,359 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,363 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:08:52,411 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:08:52,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:08:52,532 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:08:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:59,020 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:08:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:01,162 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:09:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:09,414 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:09:09,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:11,561 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:09:11,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:19,815 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-02 23:09:19,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:21,974 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:09:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:30,263 WARN L205 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-02 23:09:30,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:32,466 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-02 23:09:32,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:40,842 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-05-02 23:09:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:43,125 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:09:43,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:51,600 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2021-05-02 23:09:51,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:53,887 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:09:53,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:02,454 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 155 DAG size of output: 153 [2021-05-02 23:10:02,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:04,986 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:10:04,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:13,602 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-05-02 23:10:13,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:16,065 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 177 [2021-05-02 23:10:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:16,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004925397] [2021-05-02 23:10:16,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004925397] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:16,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:16,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:10:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660608091] [2021-05-02 23:10:16,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:10:16,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:16,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:10:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=370, Unknown=15, NotChecked=0, Total=462 [2021-05-02 23:10:16,083 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:16,243 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:10:16,556 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:10:20,855 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 23:10:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:54,910 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 23:10:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:10:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:10:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:54,919 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:10:54,919 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:10:54,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 85915.7ms TimeCoverageRelationStatistics Valid=95, Invalid=489, Unknown=16, NotChecked=0, Total=600 [2021-05-02 23:10:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:10:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-05-02 23:10:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-02 23:10:54,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2021-05-02 23:10:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:54,933 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-02 23:10:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-02 23:10:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:10:54,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:54,939 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:54,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:10:54,939 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 9 times [2021-05-02 23:10:54,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:54,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398899682] [2021-05-02 23:10:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:02,447 WARN L205 SmtUtils]: Spent 7.39 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:11:02,551 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:11:12,064 WARN L205 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:11:12,211 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 1 [2021-05-02 23:11:12,226 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,227 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:11:12,232 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:11:12,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:11:12,397 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,403 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,408 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,414 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,420 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,425 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,436 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,442 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:12,511 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:11:12,513 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:11:12,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:11:12,749 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:11:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:12,944 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:11:12,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:19,465 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:11:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:21,644 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:11:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:30,036 WARN L205 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:11:30,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:32,290 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:11:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:40,664 WARN L205 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-02 23:11:40,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:42,891 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:11:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:51,375 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-02 23:11:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:53,775 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-02 23:11:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:02,295 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-05-02 23:12:02,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:04,694 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:12:04,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:13,567 WARN L205 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2021-05-02 23:12:13,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:15,969 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 130 [2021-05-02 23:12:15,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:24,619 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 152 DAG size of output: 150 [2021-05-02 23:12:24,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:27,056 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:12:27,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:35,776 WARN L205 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 169 DAG size of output: 167 [2021-05-02 23:12:35,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:38,293 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:12:38,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:47,014 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2021-05-02 23:12:47,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:49,642 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 190 [2021-05-02 23:12:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:49,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398899682] [2021-05-02 23:12:49,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [398899682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:49,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:49,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:12:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047157688] [2021-05-02 23:12:49,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:12:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:12:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=450, Unknown=17, NotChecked=0, Total=552 [2021-05-02 23:12:49,669 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:49,988 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:12:50,469 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:12:54,894 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 23:13:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:35,901 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-05-02 23:13:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:13:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:13:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:35,915 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:13:35,915 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:13:35,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 99453.3ms TimeCoverageRelationStatistics Valid=103, Invalid=581, Unknown=18, NotChecked=0, Total=702 [2021-05-02 23:13:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:13:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-02 23:13:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-02 23:13:35,945 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-05-02 23:13:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:35,945 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-02 23:13:35,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-02 23:13:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:13:35,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:35,946 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:35,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:13:35,947 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 10 times [2021-05-02 23:13:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381284362] [2021-05-02 23:13:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:41,930 WARN L205 SmtUtils]: Spent 5.88 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:13:47,864 WARN L205 SmtUtils]: Spent 5.83 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:13:48,513 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 1 [2021-05-02 23:13:48,534 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,535 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:13:48,538 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:13:48,659 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:13:48,758 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,766 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,774 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,782 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,798 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,806 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,814 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:48,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:13:48,915 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:13:49,062 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:13:49,175 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:13:49,185 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:13:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:49,418 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:13:49,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:13:49,774 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2021-05-02 23:13:49,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:56,124 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:13:56,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:58,355 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:13:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:06,797 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-02 23:14:06,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:09,113 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 23:14:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:17,661 WARN L205 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-02 23:14:17,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:19,982 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:14:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:29,167 WARN L205 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-05-02 23:14:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:31,567 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:14:31,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:40,259 WARN L205 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-05-02 23:14:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:42,904 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:14:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:51,596 WARN L205 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2021-05-02 23:14:51,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:54,052 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:14:54,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:02,764 WARN L205 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2021-05-02 23:15:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:05,298 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 150 [2021-05-02 23:15:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:14,231 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2021-05-02 23:15:14,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:17,026 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 173 [2021-05-02 23:15:17,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:26,175 WARN L205 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2021-05-02 23:15:26,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:28,887 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 195 [2021-05-02 23:15:28,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:38,848 WARN L205 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 212 DAG size of output: 210 [2021-05-02 23:15:38,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:41,896 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 216 [2021-05-02 23:15:41,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:41,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381284362] [2021-05-02 23:15:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381284362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:41,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:41,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:15:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350198251] [2021-05-02 23:15:41,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:15:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:15:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=538, Unknown=19, NotChecked=0, Total=650 [2021-05-02 23:15:41,920 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:42,131 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:15:42,563 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:15:46,946 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 47