/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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:00:50,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:00:50,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:00:50,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:00:50,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:00:50,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:00:50,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:00:50,977 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 01:00:51,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:00:51,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:00:51,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:00:51,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:00:51,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:00:51,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:00:51,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:00:51,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:00:51,011 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:00:51,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:00:51,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:00:51,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:00:51,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:00:51,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:00:51,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:00:51,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:00:51,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:00:51,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:00:51,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:00:51,014 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:00:51,014 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:00:51,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:00:51,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:00:51,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:00:51,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:00:51,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:00:51,226 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:00:51,229 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:00:51,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 01:00:51,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59ba9cbb/a3fa9bd185194d38aa4aaa74c8ef42ce/FLAG90fe93ecf [2022-01-10 01:00:51,581 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:00:51,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 01:00:51,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59ba9cbb/a3fa9bd185194d38aa4aaa74c8ef42ce/FLAG90fe93ecf [2022-01-10 01:00:52,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59ba9cbb/a3fa9bd185194d38aa4aaa74c8ef42ce [2022-01-10 01:00:52,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:00:52,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:00:52,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:00:52,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:00:52,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:00:52,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646be534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52, skipping insertion in model container [2022-01-10 01:00:52,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:00:52,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:00:52,191 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/Ackermann01-2.c[1234,1247] [2022-01-10 01:00:52,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:00:52,199 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:00:52,211 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/Ackermann01-2.c[1234,1247] [2022-01-10 01:00:52,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:00:52,221 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:00:52,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52 WrapperNode [2022-01-10 01:00:52,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:00:52,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:00:52,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:00:52,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:00:52,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,241 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-01-10 01:00:52,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:00:52,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:00:52,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:00:52,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:00:52,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:00:52,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:00:52,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:00:52,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:00:52,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (1/1) ... [2022-01-10 01:00:52,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:00:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:52,301 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 01:00:52,303 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 01:00:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:00:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:00:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:00:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 01:00:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 01:00:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:00:52,385 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:00:52,386 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:00:52,512 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:00:52,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:00:52,517 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:00:52,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:00:52 BoogieIcfgContainer [2022-01-10 01:00:52,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:00:52,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:00:52,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:00:52,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:00:52,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:00:52" (1/3) ... [2022-01-10 01:00:52,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150328c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:00:52, skipping insertion in model container [2022-01-10 01:00:52,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:00:52" (2/3) ... [2022-01-10 01:00:52,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150328c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:00:52, skipping insertion in model container [2022-01-10 01:00:52,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:00:52" (3/3) ... [2022-01-10 01:00:52,541 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2022-01-10 01:00:52,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:00:52,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:00:52,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:00:52,585 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 01:00:52,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:00:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 01:00:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 01:00:52,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:52,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:52,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2022-01-10 01:00:52,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:52,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945910802] [2022-01-10 01:00:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:52,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:52,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:52,832 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 01:00:52,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:52,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945910802] [2022-01-10 01:00:52,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945910802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:00:52,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:00:52,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:00:52,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038606188] [2022-01-10 01:00:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:00:52,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:00:52,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:00:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:00:52,861 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 01:00:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:52,991 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-10 01:00:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:00:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-01-10 01:00:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:52,999 INFO L225 Difference]: With dead ends: 38 [2022-01-10 01:00:52,999 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 01:00:53,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:00:53,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:53,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 01:00:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 01:00:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 01:00:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-10 01:00:53,041 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-01-10 01:00:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:53,041 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-10 01:00:53,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 01:00:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-10 01:00:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 01:00:53,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:53,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:53,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:00:53,045 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2022-01-10 01:00:53,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130655922] [2022-01-10 01:00:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:53,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 01:00:53,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:53,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130655922] [2022-01-10 01:00:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130655922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:00:53,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:00:53,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 01:00:53,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663064299] [2022-01-10 01:00:53,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:00:53,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:00:53,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:00:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:00:53,191 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 01:00:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:53,318 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-01-10 01:00:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:00:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 01:00:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:53,319 INFO L225 Difference]: With dead ends: 29 [2022-01-10 01:00:53,320 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 01:00:53,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:00:53,321 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:53,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 01:00:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-10 01:00:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 01:00:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-10 01:00:53,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2022-01-10 01:00:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:53,327 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-10 01:00:53,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 01:00:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-10 01:00:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 01:00:53,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:53,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:53,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:00:53,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash -445405100, now seen corresponding path program 1 times [2022-01-10 01:00:53,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:53,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510132623] [2022-01-10 01:00:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:53,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 01:00:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:00:53,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510132623] [2022-01-10 01:00:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510132623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158680666] [2022-01-10 01:00:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:53,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:53,429 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 01:00:53,442 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 01:00:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 01:00:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:00:53,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:00:53,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158680666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:00:53,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:00:53,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-01-10 01:00:53,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364332316] [2022-01-10 01:00:53,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:00:53,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 01:00:53,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 01:00:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:00:53,738 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 01:00:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:53,869 INFO L93 Difference]: Finished difference Result 48 states and 75 transitions. [2022-01-10 01:00:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:00:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2022-01-10 01:00:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:53,874 INFO L225 Difference]: With dead ends: 48 [2022-01-10 01:00:53,874 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 01:00:53,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-01-10 01:00:53,878 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:53,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 85 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 01:00:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-01-10 01:00:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 01:00:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 01:00:53,885 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2022-01-10 01:00:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:53,886 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 01:00:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 01:00:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 01:00:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 01:00:53,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:53,889 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:53,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:00:54,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:54,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2022-01-10 01:00:54,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:54,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394499559] [2022-01-10 01:00:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:54,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:00:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 01:00:54,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394499559] [2022-01-10 01:00:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394499559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990851874] [2022-01-10 01:00:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:54,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:54,284 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 01:00:54,286 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 01:00:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 01:00:54,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 01:00:54,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 01:00:54,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990851874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:00:54,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:00:54,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2022-01-10 01:00:54,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538169223] [2022-01-10 01:00:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:00:54,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 01:00:54,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 01:00:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:00:54,885 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 01:00:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:55,541 INFO L93 Difference]: Finished difference Result 72 states and 133 transitions. [2022-01-10 01:00:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 01:00:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 32 [2022-01-10 01:00:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:55,550 INFO L225 Difference]: With dead ends: 72 [2022-01-10 01:00:55,551 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 01:00:55,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 01:00:55,555 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:55,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 170 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 01:00:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 01:00:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2022-01-10 01:00:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2022-01-10 01:00:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2022-01-10 01:00:55,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 32 [2022-01-10 01:00:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2022-01-10 01:00:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 01:00:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2022-01-10 01:00:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 01:00:55,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:55,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:55,602 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 01:00:55,790 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,SelfDestructingSolverStorable3 [2022-01-10 01:00:55,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash 372648096, now seen corresponding path program 2 times [2022-01-10 01:00:55,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484675402] [2022-01-10 01:00:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:55,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:00:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 01:00:55,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484675402] [2022-01-10 01:00:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484675402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:55,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136979154] [2022-01-10 01:00:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:00:55,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:55,950 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 01:00:55,951 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 01:00:55,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:00:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:00:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 01:00:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 01:00:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 01:00:56,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136979154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:00:56,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:00:56,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2022-01-10 01:00:56,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833103126] [2022-01-10 01:00:56,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:00:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 01:00:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 01:00:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-10 01:00:56,425 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-01-10 01:00:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:56,657 INFO L93 Difference]: Finished difference Result 96 states and 220 transitions. [2022-01-10 01:00:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 01:00:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 46 [2022-01-10 01:00:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:56,659 INFO L225 Difference]: With dead ends: 96 [2022-01-10 01:00:56,659 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 01:00:56,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-10 01:00:56,661 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:56,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 01:00:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-01-10 01:00:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (57), 17 states have call predecessors, (57), 9 states have call successors, (57) [2022-01-10 01:00:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2022-01-10 01:00:56,671 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 46 [2022-01-10 01:00:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:56,671 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2022-01-10 01:00:56,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-01-10 01:00:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2022-01-10 01:00:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 01:00:56,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:56,673 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:56,695 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 01:00:56,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:56,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash 421612277, now seen corresponding path program 3 times [2022-01-10 01:00:56,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:56,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738840916] [2022-01-10 01:00:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:56,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:56,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:00:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:00:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 76 proven. 29 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 01:00:57,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738840916] [2022-01-10 01:00:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738840916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80749248] [2022-01-10 01:00:57,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:00:57,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:57,118 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 01:00:57,119 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 01:00:57,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 01:00:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:00:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 01:00:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 01:00:57,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 01:00:57,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80749248] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:57,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 01:00:57,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16, 9] total 27 [2022-01-10 01:00:57,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650582901] [2022-01-10 01:00:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:00:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 01:00:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 01:00:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-10 01:00:57,732 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 01:00:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:57,838 INFO L93 Difference]: Finished difference Result 76 states and 139 transitions. [2022-01-10 01:00:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:00:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-01-10 01:00:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:57,839 INFO L225 Difference]: With dead ends: 76 [2022-01-10 01:00:57,839 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 01:00:57,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-10 01:00:57,840 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:57,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 80 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:00:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 01:00:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-10 01:00:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 9 states have call successors, (9), 2 states have call predecessors, (9), 15 states have return successors, (75), 21 states have call predecessors, (75), 9 states have call successors, (75) [2022-01-10 01:00:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 133 transitions. [2022-01-10 01:00:57,856 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 133 transitions. Word has length 66 [2022-01-10 01:00:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:57,856 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 133 transitions. [2022-01-10 01:00:57,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 01:00:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 133 transitions. [2022-01-10 01:00:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 01:00:57,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:57,858 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:57,875 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 01:00:58,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:58,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:00:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:00:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -558645120, now seen corresponding path program 4 times [2022-01-10 01:00:58,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:00:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563310573] [2022-01-10 01:00:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:00:58,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:00:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:00:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:00:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:00:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:00:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:00:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:00:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 136 proven. 61 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-10 01:00:58,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:00:58,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563310573] [2022-01-10 01:00:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563310573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:00:58,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089573290] [2022-01-10 01:00:58,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 01:00:58,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:00:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:00:58,227 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 01:00:58,228 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 01:00:58,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 01:00:58,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:00:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 01:00:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:00:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 111 proven. 112 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-10 01:00:58,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:00:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 111 proven. 128 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 01:00:59,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089573290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:00:59,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:00:59,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 20 [2022-01-10 01:00:59,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792328172] [2022-01-10 01:00:59,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:00:59,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 01:00:59,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:00:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 01:00:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-10 01:00:59,602 INFO L87 Difference]: Start difference. First operand 72 states and 133 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:00:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:00:59,765 INFO L93 Difference]: Finished difference Result 156 states and 445 transitions. [2022-01-10 01:00:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 01:00:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 86 [2022-01-10 01:00:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:00:59,767 INFO L225 Difference]: With dead ends: 156 [2022-01-10 01:00:59,767 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 01:00:59,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2022-01-10 01:00:59,769 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:00:59,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 163 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:00:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 01:00:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-01-10 01:00:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (60), 16 states have call predecessors, (60), 10 states have call successors, (60) [2022-01-10 01:00:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 123 transitions. [2022-01-10 01:00:59,781 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 123 transitions. Word has length 86 [2022-01-10 01:00:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:00:59,782 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 123 transitions. [2022-01-10 01:00:59,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:00:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 123 transitions. [2022-01-10 01:00:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 01:00:59,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:00:59,786 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:00:59,812 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 01:01:00,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:01:00,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:01:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:01:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1617123443, now seen corresponding path program 5 times [2022-01-10 01:01:00,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:01:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735677289] [2022-01-10 01:01:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:01:00,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:01:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 01:01:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:01:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:01:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-10 01:01:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:01:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 01:01:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:01:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 104 proven. 217 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-01-10 01:01:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:01:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735677289] [2022-01-10 01:01:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735677289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:01:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915082679] [2022-01-10 01:01:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 01:01:00,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:01:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:01:00,285 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 01:01:00,286 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 01:01:00,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 01:01:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:01:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 01:01:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:01:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 337 proven. 37 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 01:01:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:01:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 148 proven. 142 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-01-10 01:01:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915082679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:01:02,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:01:02,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 34 [2022-01-10 01:01:02,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296598807] [2022-01-10 01:01:02,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:01:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 01:01:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:01:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 01:01:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 01:01:02,195 INFO L87 Difference]: Start difference. First operand 72 states and 123 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 12 states have call successors, (19), 2 states have call predecessors, (19), 15 states have return successors, (34), 20 states have call predecessors, (34), 12 states have call successors, (34) [2022-01-10 01:01:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:01:03,185 INFO L93 Difference]: Finished difference Result 142 states and 351 transitions. [2022-01-10 01:01:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 01:01:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 12 states have call successors, (19), 2 states have call predecessors, (19), 15 states have return successors, (34), 20 states have call predecessors, (34), 12 states have call successors, (34) Word has length 113 [2022-01-10 01:01:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:01:03,188 INFO L225 Difference]: With dead ends: 142 [2022-01-10 01:01:03,188 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 01:01:03,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=778, Invalid=3382, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 01:01:03,191 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 01:01:03,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 01:01:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 01:01:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 01:01:03,191 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 01:01:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 01:01:03,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 113 [2022-01-10 01:01:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:01:03,192 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 01:01:03,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 12 states have call successors, (19), 2 states have call predecessors, (19), 15 states have return successors, (34), 20 states have call predecessors, (34), 12 states have call successors, (34) [2022-01-10 01:01:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 01:01:03,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 01:01:03,194 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:01:03,213 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 01:01:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:01:03,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 01:01:04,065 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-10 01:01:04,065 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-10 01:01:04,065 INFO L858 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2022-01-10 01:01:04,065 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-10 01:01:04,065 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-10 01:01:04,065 INFO L861 garLoopResultBuilder]: At program point L28(lines 28 48) the Hoare annotation is: true [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 47) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~m~0#1| 3) (<= 0 |ULTIMATE.start_main_~n~0#1|)) [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 41) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-01-10 01:01:04,066 INFO L854 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0)) (<= |ackermann_#in~n| 0)) [2022-01-10 01:01:04,066 INFO L854 garLoopResultBuilder]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#in~m|) (<= 3 |ackermann_#t~ret5|) .cse0 .cse1) (and (not (= ackermann_~m 0)) (<= 0 |ackermann_#in~m|) .cse0 (<= 2 |ackermann_#t~ret5|) .cse1 (<= |ackermann_#in~m| 1)))) [2022-01-10 01:01:04,066 INFO L861 garLoopResultBuilder]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2022-01-10 01:01:04,066 INFO L858 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2022-01-10 01:01:04,067 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-01-10 01:01:04,067 INFO L858 garLoopResultBuilder]: For program point L24-3(line 24) no Hoare annotation was computed. [2022-01-10 01:01:04,067 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-01-10 01:01:04,067 INFO L858 garLoopResultBuilder]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2022-01-10 01:01:04,069 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2022-01-10 01:01:04,070 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 01:01:04,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:01:04 BoogieIcfgContainer [2022-01-10 01:01:04,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 01:01:04,077 INFO L158 Benchmark]: Toolchain (without parser) took 12062.84ms. Allocated memory was 173.0MB in the beginning and 288.4MB in the end (delta: 115.3MB). Free memory was 122.4MB in the beginning and 161.9MB in the end (delta: -39.5MB). Peak memory consumption was 142.0MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,077 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 138.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 01:01:04,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.43ms. Allocated memory was 173.0MB in the beginning and 240.1MB in the end (delta: 67.1MB). Free memory was 122.2MB in the beginning and 218.2MB in the end (delta: -95.9MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.79ms. Allocated memory is still 240.1MB. Free memory was 218.2MB in the beginning and 216.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,078 INFO L158 Benchmark]: Boogie Preprocessor took 20.62ms. Allocated memory is still 240.1MB. Free memory was 216.6MB in the beginning and 216.1MB in the end (delta: 526.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,078 INFO L158 Benchmark]: RCFGBuilder took 254.81ms. Allocated memory is still 240.1MB. Free memory was 216.1MB in the beginning and 205.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,078 INFO L158 Benchmark]: TraceAbstraction took 11557.82ms. Allocated memory was 240.1MB in the beginning and 288.4MB in the end (delta: 48.2MB). Free memory was 205.0MB in the beginning and 161.9MB in the end (delta: 43.1MB). Peak memory consumption was 157.4MB. Max. memory is 8.0GB. [2022-01-10 01:01:04,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 138.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.43ms. Allocated memory was 173.0MB in the beginning and 240.1MB in the end (delta: 67.1MB). Free memory was 122.2MB in the beginning and 218.2MB in the end (delta: -95.9MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.79ms. Allocated memory is still 240.1MB. Free memory was 218.2MB in the beginning and 216.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.62ms. Allocated memory is still 240.1MB. Free memory was 216.6MB in the beginning and 216.1MB in the end (delta: 526.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 254.81ms. Allocated memory is still 240.1MB. Free memory was 216.1MB in the beginning and 205.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 11557.82ms. Allocated memory was 240.1MB in the beginning and 288.4MB in the end (delta: 48.2MB). Free memory was 205.0MB in the beginning and 161.9MB in the end (delta: 43.1MB). Peak memory consumption was 157.4MB. 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: 46]: 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, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 8, TraceHistogramMax: 16, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 372 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 947 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 784 mSDsCounter, 592 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2331 IncrementalHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 592 mSolverCounterUnsat, 163 mSDtfsCounter, 2331 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1011 GetRequests, 785 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=6, InterpolantAutomatonStates: 128, 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, 8 MinimizatonAttempts, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 166 PreInvPairs, 253 NumberOfFragments, 68 HoareAnnotationTreeSize, 166 FomulaSimplifications, 5648 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 6 FomulaSimplificationsInter, 8155 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 767 NumberOfCodeBlocks, 669 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1115 ConstructedInterpolants, 0 QuantifiedInterpolants, 2335 SizeOfPredicates, 20 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2845/3631 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 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-01-10 01:01:04,109 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...