/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:03:12,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:03:12,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:03:12,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:03:12,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:03:12,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:03:12,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:03:12,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:03:12,687 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:03:12,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:03:12,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:03:12,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:03:12,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:03:12,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:03:12,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:03:12,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:03:12,689 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:03:12,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:03:12,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:03:12,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:12,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:03:12,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:03:12,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:03:12,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:03:12,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:03:12,898 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:03:12,898 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:03:12,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-10 01:03:12,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e382cdf/e97787c528424de2b67d2a2446cfcd2a/FLAG96c8dc670 [2022-01-10 01:03:13,304 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:03:13,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-10 01:03:13,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e382cdf/e97787c528424de2b67d2a2446cfcd2a/FLAG96c8dc670 [2022-01-10 01:03:13,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e382cdf/e97787c528424de2b67d2a2446cfcd2a [2022-01-10 01:03:13,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:03:13,324 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:03:13,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:13,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:03:13,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:03:13,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f71bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13, skipping insertion in model container [2022-01-10 01:03:13,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:03:13,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:03:13,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c[454,467] [2022-01-10 01:03:13,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:13,574 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:03:13,590 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c[454,467] [2022-01-10 01:03:13,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:13,599 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:03:13,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13 WrapperNode [2022-01-10 01:03:13,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:13,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:13,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:03:13,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:03:13,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,662 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-01-10 01:03:13,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:13,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:03:13,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:03:13,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:03:13,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:03:13,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:03:13,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:03:13,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:03:13,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (1/1) ... [2022-01-10 01:03:13,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:13,740 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) [2022-01-10 01:03:13,763 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 [2022-01-10 01:03:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:03:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:03:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:03:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:03:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 01:03:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 01:03:13,846 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:03:13,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:03:13,974 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:03:13,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:03:13,978 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:03:13,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:13 BoogieIcfgContainer [2022-01-10 01:03:13,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:03:13,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:03:13,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:03:13,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:03:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:03:13" (1/3) ... [2022-01-10 01:03:13,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baae0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:13, skipping insertion in model container [2022-01-10 01:03:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:13" (2/3) ... [2022-01-10 01:03:13,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baae0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:13, skipping insertion in model container [2022-01-10 01:03:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:13" (3/3) ... [2022-01-10 01:03:13,987 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2022-01-10 01:03:13,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:03:13,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:03:14,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:03:14,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 01:03:14,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:03:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 01:03:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 01:03:14,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:14,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:14,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-01-10 01:03:14,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:14,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114894801] [2022-01-10 01:03:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:14,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:03:14,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114894801] [2022-01-10 01:03:14,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114894801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:03:14,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:03:14,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:03:14,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671250874] [2022-01-10 01:03:14,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:03:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:03:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:03:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:03:14,312 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:14,364 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 01:03:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:03:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 01:03:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:14,372 INFO L225 Difference]: With dead ends: 25 [2022-01-10 01:03:14,372 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 01:03:14,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:03:14,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:14,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 01:03:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 01:03:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 01:03:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 01:03:14,404 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 01:03:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:14,404 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 01:03:14,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 01:03:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 01:03:14,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:14,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:14,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:03:14,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-01-10 01:03:14,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:14,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714702680] [2022-01-10 01:03:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:14,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:14,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714702680] [2022-01-10 01:03:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714702680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:14,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110939594] [2022-01-10 01:03:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:14,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:14,521 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) [2022-01-10 01:03:14,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:03:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 01:03:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:14,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 01:03:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110939594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:14,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2022-01-10 01:03:14,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741040848] [2022-01-10 01:03:14,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:14,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 01:03:14,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 01:03:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:03:14,812 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:14,842 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 01:03:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:03:14,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-01-10 01:03:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:14,843 INFO L225 Difference]: With dead ends: 22 [2022-01-10 01:03:14,843 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 01:03:14,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-10 01:03:14,844 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:14,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 01:03:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 01:03:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 01:03:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 01:03:14,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 01:03:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:14,848 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 01:03:14,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 01:03:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 01:03:14,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:14,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:14,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 01:03:15,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:15,065 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-01-10 01:03:15,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088483505] [2022-01-10 01:03:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:15,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:15,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088483505] [2022-01-10 01:03:15,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088483505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042380057] [2022-01-10 01:03:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:03:15,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:15,144 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) [2022-01-10 01:03:15,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:03:15,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:03:15,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:03:15,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:03:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042380057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:15,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2022-01-10 01:03:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910141891] [2022-01-10 01:03:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 01:03:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 01:03:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-10 01:03:15,460 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:15,492 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 01:03:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:03:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-10 01:03:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:15,493 INFO L225 Difference]: With dead ends: 25 [2022-01-10 01:03:15,493 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 01:03:15,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-10 01:03:15,494 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:15,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 01:03:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 01:03:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:03:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 01:03:15,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 01:03:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:15,498 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 01:03:15,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 01:03:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 01:03:15,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:15,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:15,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:15,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 01:03:15,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-01-10 01:03:15,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971869302] [2022-01-10 01:03:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:15,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:15,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:15,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971869302] [2022-01-10 01:03:15,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971869302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:15,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837973538] [2022-01-10 01:03:15,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:03:15,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:15,880 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) [2022-01-10 01:03:15,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 01:03:15,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 01:03:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 01:03:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:16,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 01:03:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837973538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:16,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2022-01-10 01:03:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717105882] [2022-01-10 01:03:16,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:16,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 01:03:16,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 01:03:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-01-10 01:03:16,390 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 01:03:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:16,440 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-10 01:03:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:03:16,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-01-10 01:03:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:16,442 INFO L225 Difference]: With dead ends: 28 [2022-01-10 01:03:16,442 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 01:03:16,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-01-10 01:03:16,447 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:16,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 01:03:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 01:03:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:03:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-10 01:03:16,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-10 01:03:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:16,455 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-10 01:03:16,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 01:03:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-10 01:03:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 01:03:16,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:16,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:16,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:16,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:16,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-01-10 01:03:16,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:16,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456473384] [2022-01-10 01:03:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:16,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 01:03:16,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:16,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456473384] [2022-01-10 01:03:16,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456473384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:16,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950623019] [2022-01-10 01:03:16,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 01:03:16,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:16,772 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) [2022-01-10 01:03:16,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 01:03:16,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 01:03:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:16,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 01:03:16,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 01:03:16,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 01:03:17,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950623019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:17,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:17,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2022-01-10 01:03:17,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373958952] [2022-01-10 01:03:17,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:17,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 01:03:17,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 01:03:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-10 01:03:17,408 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 01:03:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:17,469 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-10 01:03:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:03:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-01-10 01:03:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:17,471 INFO L225 Difference]: With dead ends: 31 [2022-01-10 01:03:17,471 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 01:03:17,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-01-10 01:03:17,472 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:17,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 01:03:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 01:03:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:03:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-10 01:03:17,486 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-10 01:03:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:17,487 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-10 01:03:17,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 01:03:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-10 01:03:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 01:03:17,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:17,489 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:17,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 01:03:17,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:17,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-01-10 01:03:17,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:17,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901085370] [2022-01-10 01:03:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:17,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 01:03:17,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901085370] [2022-01-10 01:03:17,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901085370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958478979] [2022-01-10 01:03:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 01:03:17,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:17,808 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) [2022-01-10 01:03:17,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 01:03:17,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 01:03:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 01:03:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 01:03:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958478979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:18,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:18,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2022-01-10 01:03:18,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648071496] [2022-01-10 01:03:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:18,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 01:03:18,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 01:03:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-01-10 01:03:18,669 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 01:03:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:18,737 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-10 01:03:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 01:03:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-01-10 01:03:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:18,739 INFO L225 Difference]: With dead ends: 34 [2022-01-10 01:03:18,739 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 01:03:18,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:03:18,740 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:18,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 01:03:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 01:03:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 01:03:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-10 01:03:18,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-10 01:03:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:18,743 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-10 01:03:18,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 01:03:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-10 01:03:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 01:03:18,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:18,744 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:18,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:18,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:18,962 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-01-10 01:03:18,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37774038] [2022-01-10 01:03:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:18,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 01:03:19,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37774038] [2022-01-10 01:03:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37774038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600829466] [2022-01-10 01:03:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 01:03:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:19,192 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) [2022-01-10 01:03:19,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 01:03:19,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 01:03:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 01:03:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 01:03:19,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 01:03:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600829466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:20,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:20,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2022-01-10 01:03:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777507825] [2022-01-10 01:03:20,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 01:03:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 01:03:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:03:20,501 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:03:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:20,575 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-10 01:03:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 01:03:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-01-10 01:03:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:20,576 INFO L225 Difference]: With dead ends: 37 [2022-01-10 01:03:20,576 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 01:03:20,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2022-01-10 01:03:20,577 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:20,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 01:03:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 01:03:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 01:03:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 01:03:20,580 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-10 01:03:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:20,581 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 01:03:20,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:03:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 01:03:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 01:03:20,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:20,581 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:20,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:20,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-01-10 01:03:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407307660] [2022-01-10 01:03:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:20,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:20,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407307660] [2022-01-10 01:03:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407307660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998974873] [2022-01-10 01:03:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 01:03:20,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:20,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:20,933 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) [2022-01-10 01:03:20,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 01:03:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 01:03:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:21,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 01:03:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998974873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:22,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:22,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2022-01-10 01:03:22,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919544115] [2022-01-10 01:03:22,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:22,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 01:03:22,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 01:03:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-01-10 01:03:22,516 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:22,586 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 01:03:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:03:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-01-10 01:03:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:22,587 INFO L225 Difference]: With dead ends: 40 [2022-01-10 01:03:22,587 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 01:03:22,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2022-01-10 01:03:22,588 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:22,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 78 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 01:03:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 01:03:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 01:03:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 01:03:22,592 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 01:03:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:22,592 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 01:03:22,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 01:03:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 01:03:22,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:22,593 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:22,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:22,803 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-01-10 01:03:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59623129] [2022-01-10 01:03:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:22,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:22,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59623129] [2022-01-10 01:03:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59623129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528282794] [2022-01-10 01:03:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:03:22,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:22,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:22,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 01:03:23,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:03:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 01:03:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:23,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 01:03:25,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528282794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:25,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:25,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2022-01-10 01:03:25,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393395906] [2022-01-10 01:03:25,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:25,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 01:03:25,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 01:03:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:03:25,597 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:03:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:25,719 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-01-10 01:03:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 01:03:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-01-10 01:03:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:25,721 INFO L225 Difference]: With dead ends: 43 [2022-01-10 01:03:25,721 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 01:03:25,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 01:03:25,722 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:25,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 88 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 01:03:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 01:03:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 01:03:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-01-10 01:03:25,725 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-01-10 01:03:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:25,725 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-01-10 01:03:25,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:03:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-01-10 01:03:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 01:03:25,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:25,726 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:25,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:25,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-10 01:03:25,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-01-10 01:03:25,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000742190] [2022-01-10 01:03:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:25,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:25,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 01:03:26,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000742190] [2022-01-10 01:03:26,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000742190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384757519] [2022-01-10 01:03:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:03:26,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:26,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 01:03:26,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 01:03:26,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 01:03:26,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 01:03:26,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 01:03:28,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384757519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:28,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:28,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2022-01-10 01:03:28,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473625703] [2022-01-10 01:03:28,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 01:03:28,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 01:03:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2022-01-10 01:03:28,984 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 01:03:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:29,155 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-01-10 01:03:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 01:03:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 64 [2022-01-10 01:03:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:29,156 INFO L225 Difference]: With dead ends: 46 [2022-01-10 01:03:29,156 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 01:03:29,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=431, Invalid=829, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 01:03:29,157 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:29,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 85 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 01:03:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 01:03:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 01:03:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-10 01:03:29,160 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-01-10 01:03:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-10 01:03:29,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 01:03:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-10 01:03:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 01:03:29,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:29,161 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:29,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:29,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 01:03:29,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-01-10 01:03:29,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:29,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26055074] [2022-01-10 01:03:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:29,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-10 01:03:29,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26055074] [2022-01-10 01:03:29,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26055074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888654379] [2022-01-10 01:03:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 01:03:29,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:29,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:29,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 01:03:30,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 01:03:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-10 01:03:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-10 01:03:30,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-10 01:03:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888654379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:31,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:31,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-01-10 01:03:31,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145490931] [2022-01-10 01:03:31,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:31,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 01:03:31,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 01:03:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:03:31,007 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 01:03:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:31,136 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-01-10 01:03:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 01:03:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 70 [2022-01-10 01:03:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:31,138 INFO L225 Difference]: With dead ends: 49 [2022-01-10 01:03:31,138 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 01:03:31,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:03:31,138 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:31,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 633 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 01:03:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-10 01:03:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 01:03:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-10 01:03:31,142 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-01-10 01:03:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-10 01:03:31,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 01:03:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-10 01:03:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 01:03:31,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:31,143 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:31,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 01:03:31,351 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-01-10 01:03:31,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506833992] [2022-01-10 01:03:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:31,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-10 01:03:31,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506833992] [2022-01-10 01:03:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506833992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056489491] [2022-01-10 01:03:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 01:03:31,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:31,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:31,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 01:03:31,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-10 01:03:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:31,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 01:03:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-10 01:03:31,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:03:31,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056489491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:03:31,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:03:31,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 18 [2022-01-10 01:03:31,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966468663] [2022-01-10 01:03:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:03:31,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 01:03:31,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 01:03:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-01-10 01:03:31,928 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 01:03:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:32,056 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-01-10 01:03:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 01:03:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) Word has length 76 [2022-01-10 01:03:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:32,057 INFO L225 Difference]: With dead ends: 45 [2022-01-10 01:03:32,057 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 01:03:32,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2022-01-10 01:03:32,058 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:32,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 111 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 01:03:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 01:03:32,059 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) [2022-01-10 01:03:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 01:03:32,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2022-01-10 01:03:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:32,059 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 01:03:32,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 01:03:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 01:03:32,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 01:03:32,061 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:03:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 01:03:32,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~input~0#1| 10) (<= 10 |ULTIMATE.start_main_~input~0#1|)) [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2022-01-10 01:03:32,281 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2022-01-10 01:03:32,282 INFO L854 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2022-01-10 01:03:32,282 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2022-01-10 01:03:32,282 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-01-10 01:03:32,282 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2022-01-10 01:03:32,284 INFO L732 BasicCegarLoop]: Path program histogram: [11, 1] [2022-01-10 01:03:32,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 01:03:32,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:03:32 BoogieIcfgContainer [2022-01-10 01:03:32,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 01:03:32,287 INFO L158 Benchmark]: Toolchain (without parser) took 18962.36ms. Allocated memory was 178.3MB in the beginning and 308.3MB in the end (delta: 130.0MB). Free memory was 126.8MB in the beginning and 133.2MB in the end (delta: -6.4MB). Peak memory consumption was 124.5MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,287 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 01:03:32,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.26ms. Allocated memory is still 178.3MB. Free memory was 126.7MB in the beginning and 154.7MB in the end (delta: -28.0MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,287 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.26ms. Allocated memory is still 178.3MB. Free memory was 154.7MB in the beginning and 153.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,287 INFO L158 Benchmark]: Boogie Preprocessor took 22.03ms. Allocated memory is still 178.3MB. Free memory was 153.7MB in the beginning and 152.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,287 INFO L158 Benchmark]: RCFGBuilder took 294.04ms. Allocated memory is still 178.3MB. Free memory was 152.6MB in the beginning and 143.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,288 INFO L158 Benchmark]: TraceAbstraction took 18305.97ms. Allocated memory was 178.3MB in the beginning and 308.3MB in the end (delta: 130.0MB). Free memory was 142.7MB in the beginning and 133.2MB in the end (delta: 9.5MB). Peak memory consumption was 140.6MB. Max. memory is 8.0GB. [2022-01-10 01:03:32,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 273.26ms. Allocated memory is still 178.3MB. Free memory was 126.7MB in the beginning and 154.7MB in the end (delta: -28.0MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 47.26ms. Allocated memory is still 178.3MB. Free memory was 154.7MB in the beginning and 153.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.03ms. Allocated memory is still 178.3MB. Free memory was 153.7MB in the beginning and 152.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 294.04ms. Allocated memory is still 178.3MB. Free memory was 152.6MB in the beginning and 143.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 18305.97ms. Allocated memory was 178.3MB in the beginning and 308.3MB in the end (delta: 130.0MB). Free memory was 142.7MB in the beginning and 133.2MB in the end (delta: 9.5MB). Peak memory consumption was 140.6MB. 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: 15]: 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 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.2s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 617 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 541 mSDsluCounter, 1371 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1208 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 843 IncrementalHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 163 mSDtfsCounter, 843 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1263 GetRequests, 995 SyntacticMatches, 7 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=11, InterpolantAutomatonStates: 136, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 1022 NumberOfCodeBlocks, 1016 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 1419 ConstructedInterpolants, 0 QuantifiedInterpolants, 4210 SizeOfPredicates, 67 NumberOfNonLiveVariables, 1387 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 2256/4378 InterpolantCoveringCapability, 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 RESULT: Ultimate proved your program to be correct! [2022-01-10 01:03:32,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...