/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:44:57,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:44:57,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:44:57,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:44:57,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:44:57,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:44:57,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:44:57,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:44:57,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:44:57,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:44:57,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:44:57,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:44:57,767 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:44:57,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:57,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:44:57,768 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:44:57,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:44:57,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:44:57,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:44:57,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:44:57,987 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:44:58,002 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:44:58,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-04-06 19:44:58,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a808ab11/4552b9beb03a4817b8baf6c826c1a836/FLAGc769771b2 [2022-04-06 19:44:58,458 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:44:58,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-04-06 19:44:58,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a808ab11/4552b9beb03a4817b8baf6c826c1a836/FLAGc769771b2 [2022-04-06 19:44:58,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a808ab11/4552b9beb03a4817b8baf6c826c1a836 [2022-04-06 19:44:58,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:44:58,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:44:58,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:58,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:44:58,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:44:58,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39811291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58, skipping insertion in model container [2022-04-06 19:44:58,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:44:58,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:44:58,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c[373,386] [2022-04-06 19:44:58,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:58,690 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:44:58,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c[373,386] [2022-04-06 19:44:58,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:58,720 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:44:58,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58 WrapperNode [2022-04-06 19:44:58,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:58,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:44:58,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:44:58,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:44:58,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:44:58,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:44:58,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:44:58,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:44:58,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (1/1) ... [2022-04-06 19:44:58,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:58,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:44:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:44:58,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:44:58,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:44:58,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:44:58,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:44:58,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:44:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:44:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:44:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:44:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:44:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 19:44:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:44:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:44:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:44:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:44:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:44:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:44:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:44:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:44:58,874 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:44:58,875 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:44:58,971 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:44:58,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:44:58,975 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:44:58,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:58 BoogieIcfgContainer [2022-04-06 19:44:58,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:44:58,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:44:58,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:44:58,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:44:58,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:44:58" (1/3) ... [2022-04-06 19:44:58,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34909631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:58, skipping insertion in model container [2022-04-06 19:44:58,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:58" (2/3) ... [2022-04-06 19:44:58,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34909631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:58, skipping insertion in model container [2022-04-06 19:44:58,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:58" (3/3) ... [2022-04-06 19:44:58,984 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2022-04-06 19:44:58,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:44:58,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:44:59,020 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:44:59,025 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:44:59,025 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:44:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:44:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:44:59,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:59,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:59,039 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -154663714, now seen corresponding path program 1 times [2022-04-06 19:44:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741109398] [2022-04-06 19:44:59,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash -154663714, now seen corresponding path program 2 times [2022-04-06 19:44:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721363225] [2022-04-06 19:44:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721363225] [2022-04-06 19:44:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721363225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:59,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741109398] [2022-04-06 19:44:59,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741109398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:59,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815148743] [2022-04-06 19:44:59,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:59,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:44:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:44:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:59,220 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:59,247 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-04-06 19:44:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:44:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:44:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:59,252 INFO L225 Difference]: With dead ends: 39 [2022-04-06 19:44:59,252 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:44:59,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:59,256 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:59,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:44:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 19:44:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-04-06 19:44:59,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 11 [2022-04-06 19:44:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:59,293 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-04-06 19:44:59,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-04-06 19:44:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:44:59,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:59,295 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:59,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:44:59,295 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -213769058, now seen corresponding path program 1 times [2022-04-06 19:44:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865176660] [2022-04-06 19:44:59,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash -213769058, now seen corresponding path program 2 times [2022-04-06 19:44:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817845919] [2022-04-06 19:44:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817845919] [2022-04-06 19:44:59,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817845919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:59,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:59,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865176660] [2022-04-06 19:44:59,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865176660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:59,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619402822] [2022-04-06 19:44:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:59,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:59,415 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:59,484 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-04-06 19:44:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:44:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:59,487 INFO L225 Difference]: With dead ends: 29 [2022-04-06 19:44:59,488 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:44:59,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:59,489 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:59,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:44:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 19:44:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2022-04-06 19:44:59,494 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 11 [2022-04-06 19:44:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:59,495 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2022-04-06 19:44:59,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2022-04-06 19:44:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:44:59,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:59,495 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:59,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:44:59,496 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1726513949, now seen corresponding path program 1 times [2022-04-06 19:44:59,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113461916] [2022-04-06 19:44:59,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:59,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1726513949, now seen corresponding path program 2 times [2022-04-06 19:44:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030983249] [2022-04-06 19:44:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030983249] [2022-04-06 19:44:59,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030983249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:59,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113461916] [2022-04-06 19:44:59,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113461916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:59,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336393663] [2022-04-06 19:44:59,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:59,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:59,555 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:59,621 INFO L93 Difference]: Finished difference Result 51 states and 82 transitions. [2022-04-06 19:44:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:44:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:59,623 INFO L225 Difference]: With dead ends: 51 [2022-04-06 19:44:59,623 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 19:44:59,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:59,624 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:59,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 19:44:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 19:44:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 19:44:59,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 22 [2022-04-06 19:44:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:59,631 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 19:44:59,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 19:44:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:44:59,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:59,656 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:59,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 19:44:59,658 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,659 INFO L85 PathProgramCache]: Analyzing trace with hash 622763737, now seen corresponding path program 1 times [2022-04-06 19:44:59,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233798761] [2022-04-06 19:44:59,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:59,669 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 622763737, now seen corresponding path program 2 times [2022-04-06 19:44:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443773852] [2022-04-06 19:44:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443773852] [2022-04-06 19:44:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443773852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864878851] [2022-04-06 19:44:59,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:59,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:59,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:44:59,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:59,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:59,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 19:44:59,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864878851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:00,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:00,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 17 [2022-04-06 19:45:00,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233798761] [2022-04-06 19:45:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233798761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:00,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:00,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:45:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098995409] [2022-04-06 19:45:00,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:00,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:45:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:45:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:45:00,281 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:00,445 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-04-06 19:45:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:45:00,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:45:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:00,447 INFO L225 Difference]: With dead ends: 51 [2022-04-06 19:45:00,447 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 19:45:00,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:45:00,448 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:00,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 19:45:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 19:45:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-04-06 19:45:00,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 22 [2022-04-06 19:45:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:00,464 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-04-06 19:45:00,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-04-06 19:45:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:45:00,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:00,465 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:00,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:45:00,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:00,678 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1231331367, now seen corresponding path program 1 times [2022-04-06 19:45:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192150935] [2022-04-06 19:45:00,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:00,680 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1231331367, now seen corresponding path program 2 times [2022-04-06 19:45:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468613597] [2022-04-06 19:45:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468613597] [2022-04-06 19:45:00,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468613597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:00,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:00,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:45:00,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192150935] [2022-04-06 19:45:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192150935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:00,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:00,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:45:00,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524300897] [2022-04-06 19:45:00,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:00,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:45:00,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:45:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:45:00,734 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:00,792 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-06 19:45:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:45:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:45:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:00,793 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:45:00,793 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 19:45:00,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:45:00,794 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:00,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:45:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 19:45:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 19:45:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-04-06 19:45:00,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 22 [2022-04-06 19:45:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:00,802 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-04-06 19:45:00,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-04-06 19:45:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:45:00,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:00,802 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:00,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 19:45:00,803 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1231370265, now seen corresponding path program 1 times [2022-04-06 19:45:00,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634585729] [2022-04-06 19:45:00,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:00,806 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1231370265, now seen corresponding path program 2 times [2022-04-06 19:45:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:00,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19126281] [2022-04-06 19:45:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19126281] [2022-04-06 19:45:00,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19126281] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089848253] [2022-04-06 19:45:00,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:00,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:00,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:45:00,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:45:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:01,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089848253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:01,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:01,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 19:45:01,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634585729] [2022-04-06 19:45:01,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634585729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:01,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:01,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:45:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579869091] [2022-04-06 19:45:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:01,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:45:01,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:45:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:45:01,317 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:01,544 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-04-06 19:45:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:45:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:45:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:01,545 INFO L225 Difference]: With dead ends: 61 [2022-04-06 19:45:01,545 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 19:45:01,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:45:01,547 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:01,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 19:45:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 19:45:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-04-06 19:45:01,555 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 22 [2022-04-06 19:45:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:01,562 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-04-06 19:45:01,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-04-06 19:45:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:45:01,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:01,563 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:01,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:01,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 19:45:01,764 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -528285250, now seen corresponding path program 3 times [2022-04-06 19:45:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:01,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319971627] [2022-04-06 19:45:01,771 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:01,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -528285250, now seen corresponding path program 4 times [2022-04-06 19:45:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080669162] [2022-04-06 19:45:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:01,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080669162] [2022-04-06 19:45:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080669162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335203354] [2022-04-06 19:45:01,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:01,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:01,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:01,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:01,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:45:01,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:01,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:45:01,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335203354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:02,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:02,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 19:45:02,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:02,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319971627] [2022-04-06 19:45:02,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319971627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:02,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:02,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:45:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429390913] [2022-04-06 19:45:02,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:02,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:45:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:45:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:45:02,153 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:02,286 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-04-06 19:45:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:45:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:45:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:02,287 INFO L225 Difference]: With dead ends: 60 [2022-04-06 19:45:02,287 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 19:45:02,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:45:02,289 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:02,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 19:45:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 19:45:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-04-06 19:45:02,293 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 33 [2022-04-06 19:45:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:02,294 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-04-06 19:45:02,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-04-06 19:45:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:45:02,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:02,294 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:02,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:02,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:02,496 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1325221442, now seen corresponding path program 3 times [2022-04-06 19:45:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564071323] [2022-04-06 19:45:02,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:02,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1325221442, now seen corresponding path program 4 times [2022-04-06 19:45:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:02,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539511338] [2022-04-06 19:45:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:02,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539511338] [2022-04-06 19:45:02,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539511338] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823163212] [2022-04-06 19:45:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:02,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:02,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:45:02,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:45:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:03,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:03,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823163212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:03,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 6] total 48 [2022-04-06 19:45:03,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564071323] [2022-04-06 19:45:03,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564071323] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:03,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:03,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:45:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309240116] [2022-04-06 19:45:03,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:03,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:45:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:45:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:45:03,605 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:04,133 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-04-06 19:45:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:45:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:45:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:04,136 INFO L225 Difference]: With dead ends: 51 [2022-04-06 19:45:04,136 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 19:45:04,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:45:04,138 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:04,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 108 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 19:45:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 19:45:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-04-06 19:45:04,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 33 [2022-04-06 19:45:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:04,150 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-04-06 19:45:04,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-04-06 19:45:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 19:45:04,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:04,154 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:04,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 19:45:04,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,370 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash -820367623, now seen corresponding path program 5 times [2022-04-06 19:45:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:04,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193769404] [2022-04-06 19:45:04,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:04,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -820367623, now seen corresponding path program 6 times [2022-04-06 19:45:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291263198] [2022-04-06 19:45:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:04,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:04,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291263198] [2022-04-06 19:45:04,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291263198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:04,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141126874] [2022-04-06 19:45:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:04,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:04,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:04,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:45:04,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:45:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:45:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:05,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:06,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141126874] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:06,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:06,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 19:45:06,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:06,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193769404] [2022-04-06 19:45:06,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193769404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:06,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:06,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:45:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088370978] [2022-04-06 19:45:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:06,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:45:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:45:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=3215, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:45:06,433 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:07,364 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 19:45:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:45:07,365 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 19:45:07,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:07,367 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:45:07,367 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 19:45:07,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2154, Invalid=7158, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 19:45:07,370 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:07,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 98 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 19:45:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 19:45:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-04-06 19:45:07,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 44 [2022-04-06 19:45:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:07,376 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-04-06 19:45:07,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-04-06 19:45:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:45:07,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:07,377 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:07,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:07,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:07,592 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1020741922, now seen corresponding path program 7 times [2022-04-06 19:45:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:07,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804068897] [2022-04-06 19:45:07,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:07,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1020741922, now seen corresponding path program 8 times [2022-04-06 19:45:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:07,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614202111] [2022-04-06 19:45:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:08,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614202111] [2022-04-06 19:45:08,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614202111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:08,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366863303] [2022-04-06 19:45:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:08,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:45:08,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:08,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:45:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:08,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366863303] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:10,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 19:45:10,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:10,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804068897] [2022-04-06 19:45:10,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804068897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:10,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:10,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:45:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100131439] [2022-04-06 19:45:10,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:10,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:45:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:45:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=5905, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:45:10,861 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:12,400 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-04-06 19:45:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:45:12,400 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 19:45:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:12,401 INFO L225 Difference]: With dead ends: 73 [2022-04-06 19:45:12,401 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 19:45:12,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2834, Invalid=13168, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 19:45:12,404 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:12,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 73 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:45:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 19:45:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 19:45:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-04-06 19:45:12,410 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 55 [2022-04-06 19:45:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:12,411 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-04-06 19:45:12,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 43 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-04-06 19:45:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 19:45:12,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:12,412 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:12,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:12,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:12,628 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -361185831, now seen corresponding path program 9 times [2022-04-06 19:45:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577867033] [2022-04-06 19:45:12,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:12,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash -361185831, now seen corresponding path program 10 times [2022-04-06 19:45:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:12,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560474848] [2022-04-06 19:45:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:13,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:45:13,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560474848] [2022-04-06 19:45:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560474848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229226255] [2022-04-06 19:45:13,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:13,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:13,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:45:13,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 19:45:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 19:45:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229226255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:15,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:15,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 55, 7] total 62 [2022-04-06 19:45:15,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577867033] [2022-04-06 19:45:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577867033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:45:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422797403] [2022-04-06 19:45:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:15,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:45:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:45:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:45:15,103 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:15,231 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-04-06 19:45:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:45:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 19:45:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:15,232 INFO L225 Difference]: With dead ends: 67 [2022-04-06 19:45:15,232 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:45:15,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 29 SyntacticMatches, 99 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=353, Invalid=3937, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:45:15,234 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:15,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:45:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:45:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 19:45:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:45:15,235 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2022-04-06 19:45:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:15,235 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:45:15,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:45:15,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:45:15,237 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:45:15,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:15,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:15,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 19:45:15,896 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-06 19:45:15,896 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-06 19:45:15,896 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L27-1(lines 17 47) the Hoare annotation is: (let ((.cse2 (div main_~y~0 2))) (let ((.cse1 (* .cse2 2))) (or (let ((.cse0 (+ main_~x~0 1))) (and (<= 0 .cse0) (<= .cse0 0) (< .cse1 main_~y~0))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse2) main_~y~0 main_~x~0) 2) 2))) (= .cse1 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 13 50) the Hoare annotation is: true [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L36-1(lines 17 47) the Hoare annotation is: (let ((.cse1 (div main_~y~0 2))) (let ((.cse0 (* .cse1 2))) (or (and (<= 1 main_~x~0) (<= main_~x~0 1) (< .cse0 main_~y~0)) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse1) main_~y~0 main_~x~0) 2) 2))) (= .cse0 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L24-1(lines 17 47) the Hoare annotation is: (let ((.cse1 (div main_~y~0 2))) (let ((.cse0 (* .cse1 2))) (or (and (<= 1 main_~x~0) (<= main_~x~0 1) (< .cse0 main_~y~0)) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse1) main_~y~0 main_~x~0) 2) 2))) (= .cse0 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L45-1(lines 17 47) the Hoare annotation is: (let ((.cse0 (div main_~y~0 2))) (let ((.cse1 (* .cse0 2))) (or (= main_~x~0 0) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse0) main_~y~0 main_~x~0) 2) 2))) (= .cse1 main_~y~0)) (and (<= (+ (div main_~x~0 4294967296) 1) 0) (<= 0 (+ 5 main_~x~0)) (<= main_~x~0 (+ (* 2 (div (+ .cse1 main_~x~0 (* (- 1) main_~y~0)) 2)) 1)) (< .cse1 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L33-1(lines 17 47) the Hoare annotation is: (let ((.cse2 (div main_~y~0 2))) (let ((.cse1 (* .cse2 2))) (or (let ((.cse0 (+ main_~x~0 3))) (and (<= .cse0 0) (<= 0 .cse0) (< .cse1 main_~y~0))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse2) main_~y~0 main_~x~0) 2) 2))) (= .cse1 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L21-1(lines 17 47) the Hoare annotation is: (let ((.cse2 (div main_~y~0 2))) (let ((.cse1 (* .cse2 2))) (or (let ((.cse0 (+ main_~x~0 1))) (and (<= 0 .cse0) (<= .cse0 0) (< .cse1 main_~y~0))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse2) main_~y~0 main_~x~0) 2) 2))) (= .cse1 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L17-2(lines 17 47) the Hoare annotation is: (let ((.cse2 (div main_~y~0 2))) (let ((.cse1 (* .cse2 2))) (let ((.cse0 (<= main_~y~0 .cse1))) (or (and (not .cse0) (<= main_~x~0 (+ (* 2 (div (+ .cse1 main_~x~0 (* (- 1) main_~y~0)) 2)) 1))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse2) main_~y~0 main_~x~0) 2) 2))) .cse0))))) [2022-04-06 19:45:15,897 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 13 50) the Hoare annotation is: true [2022-04-06 19:45:15,897 INFO L878 garLoopResultBuilder]: At program point L42-1(lines 17 47) the Hoare annotation is: (let ((.cse2 (div main_~y~0 2))) (let ((.cse1 (* .cse2 2))) (or (let ((.cse0 (+ main_~x~0 1))) (and (<= 0 .cse0) (<= .cse0 0) (< .cse1 main_~y~0))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse2) main_~y~0 main_~x~0) 2) 2))) (= .cse1 main_~y~0))))) [2022-04-06 19:45:15,897 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 13 50) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L878 garLoopResultBuilder]: At program point L30-1(lines 17 47) the Hoare annotation is: (let ((.cse1 (div main_~y~0 2))) (let ((.cse0 (* .cse1 2))) (or (and (<= 1 main_~x~0) (<= main_~x~0 1) (< .cse0 main_~y~0)) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse1) main_~y~0 main_~x~0) 2) 2))) (= .cse0 main_~y~0))))) [2022-04-06 19:45:15,898 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 19) the Hoare annotation is: (or (= main_~x~0 0) (let ((.cse0 (div main_~y~0 2))) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse0) main_~y~0 main_~x~0) 2) 2))) (<= main_~y~0 (* .cse0 2))))) [2022-04-06 19:45:15,898 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 47) the Hoare annotation is: (let ((.cse1 (div main_~y~0 2))) (let ((.cse0 (* .cse1 2))) (or (and (<= main_~x~0 (+ (* 2 (div (+ .cse0 main_~x~0 (* (- 1) main_~y~0)) 2)) 1)) (<= main_~x~0 1) (< 0 (+ (div main_~x~0 4294967296) 1)) (< .cse0 main_~y~0)) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse1) main_~y~0 main_~x~0) 2) 2))) (= .cse0 main_~y~0))))) [2022-04-06 19:45:15,898 INFO L878 garLoopResultBuilder]: At program point L39-1(lines 17 47) the Hoare annotation is: (let ((.cse1 (div main_~y~0 2))) (let ((.cse0 (* .cse1 2))) (or (and (<= main_~x~0 3) (<= 3 main_~x~0) (< .cse0 main_~y~0)) (and (<= main_~x~0 (+ 2 (* (div (+ (- 2) (* (- 2) .cse1) main_~y~0 main_~x~0) 2) 2))) (= .cse0 main_~y~0))))) [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2022-04-06 19:45:15,898 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2022-04-06 19:45:15,899 INFO L878 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:45:15,899 INFO L878 garLoopResultBuilder]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:45:15,899 INFO L885 garLoopResultBuilder]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2022-04-06 19:45:15,899 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:45:15,901 INFO L719 BasicCegarLoop]: Path program histogram: [10, 4, 2, 2, 2, 2] [2022-04-06 19:45:15,902 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:45:15,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:45:15 BoogieIcfgContainer [2022-04-06 19:45:15,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:45:15,911 INFO L158 Benchmark]: Toolchain (without parser) took 17433.89ms. Allocated memory was 216.0MB in the beginning and 374.3MB in the end (delta: 158.3MB). Free memory was 162.0MB in the beginning and 298.8MB in the end (delta: -136.8MB). Peak memory consumption was 194.1MB. Max. memory is 8.0GB. [2022-04-06 19:45:15,911 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 216.0MB. Free memory is still 177.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:45:15,911 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.44ms. Allocated memory was 216.0MB in the beginning and 287.3MB in the end (delta: 71.3MB). Free memory was 161.7MB in the beginning and 257.4MB in the end (delta: -95.6MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. [2022-04-06 19:45:15,912 INFO L158 Benchmark]: Boogie Preprocessor took 33.88ms. Allocated memory is still 287.3MB. Free memory was 257.4MB in the beginning and 255.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 19:45:15,912 INFO L158 Benchmark]: RCFGBuilder took 219.12ms. Allocated memory is still 287.3MB. Free memory was 255.5MB in the beginning and 243.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 19:45:15,912 INFO L158 Benchmark]: TraceAbstraction took 16933.69ms. Allocated memory was 287.3MB in the beginning and 374.3MB in the end (delta: 87.0MB). Free memory was 243.3MB in the beginning and 298.8MB in the end (delta: -55.5MB). Peak memory consumption was 202.9MB. Max. memory is 8.0GB. [2022-04-06 19:45:15,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 216.0MB. Free memory is still 177.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.44ms. Allocated memory was 216.0MB in the beginning and 287.3MB in the end (delta: 71.3MB). Free memory was 161.7MB in the beginning and 257.4MB in the end (delta: -95.6MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.88ms. Allocated memory is still 287.3MB. Free memory was 257.4MB in the beginning and 255.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 219.12ms. Allocated memory is still 287.3MB. Free memory was 255.5MB in the beginning and 243.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 16933.69ms. Allocated memory was 287.3MB in the beginning and 374.3MB in the end (delta: 87.0MB). Free memory was 243.3MB in the beginning and 298.8MB in the end (delta: -55.5MB). Peak memory consumption was 202.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.9s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 294 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 293 mSDsluCounter, 594 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 383 mSDsCounter, 309 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4232 IncrementalHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 309 mSolverCounterUnsat, 211 mSDtfsCounter, 4232 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 900 GetRequests, 352 SyntacticMatches, 113 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9190 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 8 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 88 PreInvPairs, 180 NumberOfFragments, 580 HoareAnnotationTreeSize, 88 FomulaSimplifications, 568 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 28 FomulaSimplificationsInter, 2107 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (x == 0 || (x <= 2 + (-2 + -2 * (y / 2) + y + x) / 2 * 2 && y / 2 * 2 == y)) || (((x / 4294967296 + 1 <= 0 && 0 <= 5 + x) && x <= 2 * ((y / 2 * 2 + x + -1 * y) / 2) + 1) && y / 2 * 2 < y) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 19:45:15,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...