/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:49:41,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:49:41,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:49:41,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 21:49:41,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:49:41,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:49:41,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:49:41,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 21:49:41,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:49:41,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:49:41,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:49:41,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:49:41,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:49:41,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:49:41,931 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:49:41,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:49:41,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:49:41,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:49:41,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:49:41,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:49:41,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:49:41,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:49:41,934 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:49:42,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:49:42,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:49:42,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:49:42,185 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:49:42,187 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:49:42,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2022-03-15 21:49:42,188 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2022-03-15 21:49:42,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:49:42,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:49:42,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:49:42,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:49:42,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:49:42,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,241 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:49:42,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:49:42,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:49:42,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:49:42,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:49:42,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:49:42,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:49:42,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:49:42,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:49:42,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/1) ... [2022-03-15 21:49:42,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:49:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:42,285 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) [2022-03-15 21:49:42,301 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 [2022-03-15 21:49:42,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:49:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:49:42,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:49:42,321 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:49:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:49:42,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:49:42,321 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:49:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:49:42,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:49:42,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 21:49:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 21:49:42,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 21:49:42,322 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 21:49:42,365 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:49:42,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:49:42,474 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:49:42,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:49:42,499 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:49:42,500 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:49:42 BoogieIcfgContainer [2022-03-15 21:49:42,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:49:42,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:49:42,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:49:42,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:49:42,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:49:42" (1/2) ... [2022-03-15 21:49:42,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165912f4 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:49:42, skipping insertion in model container [2022-03-15 21:49:42,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:49:42" (2/2) ... [2022-03-15 21:49:42,511 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2022-03-15 21:49:42,515 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:49:42,515 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:49:42,515 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:49:42,515 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:49:42,606 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 21:49:42,669 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:49:42,676 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 21:49:42,676 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 21:49:42,689 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:49:42,699 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 42 transitions, 108 flow [2022-03-15 21:49:42,702 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 42 transitions, 108 flow [2022-03-15 21:49:42,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 49 places, 42 transitions, 108 flow [2022-03-15 21:49:42,733 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-03-15 21:49:42,733 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-03-15 21:49:42,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 3/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 91 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2022-03-15 21:49:42,739 INFO L116 LiptonReduction]: Number of co-enabled transitions 634 [2022-03-15 21:49:43,327 INFO L131 LiptonReduction]: Checked pairs total: 635 [2022-03-15 21:49:43,327 INFO L133 LiptonReduction]: Total number of compositions: 19 [2022-03-15 21:49:43,336 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 24 transitions, 72 flow [2022-03-15 21:49:43,380 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 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) [2022-03-15 21:49:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 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) [2022-03-15 21:49:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:49:43,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:43,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:43,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 436046668, now seen corresponding path program 1 times [2022-03-15 21:49:43,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:43,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307749018] [2022-03-15 21:49:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:43,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307749018] [2022-03-15 21:49:43,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307749018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:43,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:43,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:49:43,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1754882503] [2022-03-15 21:49:43,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:43,545 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:43,605 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 110 transitions. [2022-03-15 21:49:43,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:43,883 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:43,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:49:43,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:49:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:43,909 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 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) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-15 21:49:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:43,964 INFO L93 Difference]: Finished difference Result 132 states and 380 transitions. [2022-03-15 21:49:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:49:43,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) Word has length 14 [2022-03-15 21:49:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:43,981 INFO L225 Difference]: With dead ends: 132 [2022-03-15 21:49:43,981 INFO L226 Difference]: Without dead ends: 132 [2022-03-15 21:49:43,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:43,988 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:43,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-15 21:49:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-15 21:49:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.900763358778626) internal successors, (380), 131 states have internal predecessors, (380), 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) [2022-03-15 21:49:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 380 transitions. [2022-03-15 21:49:44,056 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 380 transitions. Word has length 14 [2022-03-15 21:49:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:44,057 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 380 transitions. [2022-03-15 21:49:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-15 21:49:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 380 transitions. [2022-03-15 21:49:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:49:44,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:44,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:44,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:49:44,061 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash -587571780, now seen corresponding path program 1 times [2022-03-15 21:49:44,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:44,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102906970] [2022-03-15 21:49:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:44,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:44,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:44,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102906970] [2022-03-15 21:49:44,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102906970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:44,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:44,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:49:44,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [736396002] [2022-03-15 21:49:44,093 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:44,095 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:44,101 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 144 transitions. [2022-03-15 21:49:44,101 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:44,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:44,504 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [670#(<= q1_back q1_front)] [2022-03-15 21:49:44,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:49:44,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:49:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:49:44,506 INFO L87 Difference]: Start difference. First operand 132 states and 380 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-15 21:49:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:44,539 INFO L93 Difference]: Finished difference Result 128 states and 368 transitions. [2022-03-15 21:49:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:49:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 16 [2022-03-15 21:49:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:44,541 INFO L225 Difference]: With dead ends: 128 [2022-03-15 21:49:44,541 INFO L226 Difference]: Without dead ends: 128 [2022-03-15 21:49:44,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:49:44,543 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:44,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-15 21:49:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-15 21:49:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8976377952755907) internal successors, (368), 127 states have internal predecessors, (368), 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) [2022-03-15 21:49:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 368 transitions. [2022-03-15 21:49:44,551 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 368 transitions. Word has length 16 [2022-03-15 21:49:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:44,551 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 368 transitions. [2022-03-15 21:49:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-15 21:49:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 368 transitions. [2022-03-15 21:49:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:49:44,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:44,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:44,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:49:44,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1218241596, now seen corresponding path program 2 times [2022-03-15 21:49:44,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:44,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933183113] [2022-03-15 21:49:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:44,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:44,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933183113] [2022-03-15 21:49:44,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933183113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:44,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:44,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:49:44,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2050954466] [2022-03-15 21:49:44,582 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:44,583 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:44,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 61 states and 118 transitions. [2022-03-15 21:49:44,589 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:44,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:49:44,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:49:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:44,761 INFO L87 Difference]: Start difference. First operand 128 states and 368 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-15 21:49:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:44,797 INFO L93 Difference]: Finished difference Result 153 states and 442 transitions. [2022-03-15 21:49:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:49:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) Word has length 16 [2022-03-15 21:49:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:44,799 INFO L225 Difference]: With dead ends: 153 [2022-03-15 21:49:44,799 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 21:49:44,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:44,801 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:44,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 21:49:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-15 21:49:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9078947368421053) internal successors, (442), 152 states have internal predecessors, (442), 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) [2022-03-15 21:49:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 442 transitions. [2022-03-15 21:49:44,809 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 442 transitions. Word has length 16 [2022-03-15 21:49:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 442 transitions. [2022-03-15 21:49:44,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-15 21:49:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 442 transitions. [2022-03-15 21:49:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:49:44,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:44,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:44,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 21:49:44,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1792717018, now seen corresponding path program 1 times [2022-03-15 21:49:44,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:44,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190978275] [2022-03-15 21:49:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:44,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:44,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190978275] [2022-03-15 21:49:44,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190978275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:44,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:44,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:49:44,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1380648195] [2022-03-15 21:49:44,843 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:44,845 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:44,851 INFO L252 McrAutomatonBuilder]: Finished intersection with 61 states and 113 transitions. [2022-03-15 21:49:44,852 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:45,228 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:45,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:49:45,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:49:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:45,231 INFO L87 Difference]: Start difference. First operand 153 states and 442 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-15 21:49:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:45,266 INFO L93 Difference]: Finished difference Result 246 states and 681 transitions. [2022-03-15 21:49:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:49:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 18 [2022-03-15 21:49:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:45,270 INFO L225 Difference]: With dead ends: 246 [2022-03-15 21:49:45,270 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 21:49:45,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:49:45,273 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:45,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 21:49:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 153. [2022-03-15 21:49:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.8223684210526314) internal successors, (429), 152 states have internal predecessors, (429), 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) [2022-03-15 21:49:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 429 transitions. [2022-03-15 21:49:45,286 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 429 transitions. Word has length 18 [2022-03-15 21:49:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:45,286 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 429 transitions. [2022-03-15 21:49:45,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-15 21:49:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 429 transitions. [2022-03-15 21:49:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:49:45,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:45,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 21:49:45,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1347172533, now seen corresponding path program 1 times [2022-03-15 21:49:45,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:45,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967630330] [2022-03-15 21:49:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:45,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:45,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967630330] [2022-03-15 21:49:45,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967630330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:45,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:45,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:49:45,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [771580293] [2022-03-15 21:49:45,330 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:45,332 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:45,341 INFO L252 McrAutomatonBuilder]: Finished intersection with 75 states and 143 transitions. [2022-03-15 21:49:45,341 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:45,647 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2075#(<= q3_back q3_front)] [2022-03-15 21:49:45,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:49:45,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:49:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:49:45,649 INFO L87 Difference]: Start difference. First operand 153 states and 429 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-15 21:49:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:45,677 INFO L93 Difference]: Finished difference Result 118 states and 305 transitions. [2022-03-15 21:49:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:49:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) Word has length 20 [2022-03-15 21:49:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:45,678 INFO L225 Difference]: With dead ends: 118 [2022-03-15 21:49:45,678 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:49:45,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:49:45,679 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:45,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:49:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-15 21:49:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.606837606837607) internal successors, (305), 117 states have internal predecessors, (305), 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) [2022-03-15 21:49:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 305 transitions. [2022-03-15 21:49:45,683 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 305 transitions. Word has length 20 [2022-03-15 21:49:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 305 transitions. [2022-03-15 21:49:45,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-15 21:49:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 305 transitions. [2022-03-15 21:49:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:49:45,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:45,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:45,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 21:49:45,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1515883663, now seen corresponding path program 2 times [2022-03-15 21:49:45,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:45,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731322385] [2022-03-15 21:49:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:45,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:45,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:45,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731322385] [2022-03-15 21:49:45,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731322385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:45,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529708612] [2022-03-15 21:49:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:49:45,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:45,743 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) [2022-03-15 21:49:45,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 21:49:45,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:49:45,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:45,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:49:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:45,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:45,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:45,945 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:49:45,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 21:49:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:45,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529708612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:45,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:45,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 21:49:45,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988475230] [2022-03-15 21:49:45,956 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:45,959 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:45,965 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 93 transitions. [2022-03-15 21:49:45,965 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:46,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-15 21:49:46,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [2557#(or (< 0 (select q1 q1_front)) (<= q1_back q1_front)), 2556#(or (< 0 (select q1 q1_front)) (not f) (<= q1_back q1_front)), 2555#(or f (not (= (select q1 q1_back) 0))), 2558#(or (< 0 (select q1 q1_front)) (<= (+ q1_back 1) q1_front) (not f) (not (= (select q1 q1_back) 2))), 2534#(< 0 j), 2554#(not (= (select q1 q1_back) 0)), 2559#(or (< 0 (select q1 q1_front)) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)))] [2022-03-15 21:49:46,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:49:46,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:49:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:49:46,385 INFO L87 Difference]: Start difference. First operand 118 states and 305 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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) [2022-03-15 21:49:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:46,572 INFO L93 Difference]: Finished difference Result 161 states and 410 transitions. [2022-03-15 21:49:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:49:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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) Word has length 20 [2022-03-15 21:49:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:46,576 INFO L225 Difference]: With dead ends: 161 [2022-03-15 21:49:46,576 INFO L226 Difference]: Without dead ends: 161 [2022-03-15 21:49:46,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:49:46,577 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:46,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 2 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:49:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-15 21:49:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2022-03-15 21:49:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6375838926174495) internal successors, (393), 149 states have internal predecessors, (393), 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) [2022-03-15 21:49:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 393 transitions. [2022-03-15 21:49:46,583 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 393 transitions. Word has length 20 [2022-03-15 21:49:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:46,583 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 393 transitions. [2022-03-15 21:49:46,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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) [2022-03-15 21:49:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 393 transitions. [2022-03-15 21:49:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:49:46,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:46,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:46,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 21:49:46,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-15 21:49:46,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864223, now seen corresponding path program 3 times [2022-03-15 21:49:46,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:46,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72872449] [2022-03-15 21:49:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:46,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:46,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72872449] [2022-03-15 21:49:46,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72872449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:46,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260424923] [2022-03-15 21:49:46,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:49:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:46,902 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) [2022-03-15 21:49:46,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 21:49:46,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:49:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:49:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:46,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:49:46,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260424923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:46,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:49:46,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-03-15 21:49:46,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [988315160] [2022-03-15 21:49:46,992 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:46,996 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:47,005 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 103 transitions. [2022-03-15 21:49:47,006 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:47,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:47,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:47,215 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:49:47,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:49:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:49:47,216 INFO L87 Difference]: Start difference. First operand 150 states and 393 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-15 21:49:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:47,261 INFO L93 Difference]: Finished difference Result 268 states and 735 transitions. [2022-03-15 21:49:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:49:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) Word has length 22 [2022-03-15 21:49:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:47,268 INFO L225 Difference]: With dead ends: 268 [2022-03-15 21:49:47,268 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 21:49:47,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:49:47,270 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:47,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 21:49:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 234. [2022-03-15 21:49:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8798283261802573) internal successors, (671), 233 states have internal predecessors, (671), 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) [2022-03-15 21:49:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 671 transitions. [2022-03-15 21:49:47,279 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 671 transitions. Word has length 22 [2022-03-15 21:49:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:47,279 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 671 transitions. [2022-03-15 21:49:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-15 21:49:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 671 transitions. [2022-03-15 21:49:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:49:47,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:47,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:47,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:47,503 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,SelfDestructingSolverStorable6 [2022-03-15 21:49:47,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1444696953, now seen corresponding path program 4 times [2022-03-15 21:49:47,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:47,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748451678] [2022-03-15 21:49:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:47,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:47,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748451678] [2022-03-15 21:49:47,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748451678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:47,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223934202] [2022-03-15 21:49:47,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:49:47,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:47,567 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) [2022-03-15 21:49:47,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 21:49:47,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:49:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:49:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:47,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:47,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:47,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:47,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:47,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 21:49:47,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:47,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-15 21:49:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:47,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223934202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:47,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:47,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 21:49:47,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341617193] [2022-03-15 21:49:47,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:47,839 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:47,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 91 transitions. [2022-03-15 21:49:47,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:48,332 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3977#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 0))), 3974#(or (not (= (+ (select q2 q2_back) 1) j)) (<= 1 (select q2 q2_front))), 3975#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (select q2 q2_front)) (<= q1_back q1_front)), 3973#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q1_back q1_front)), 3976#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (select q2 q2_front)) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))), 3972#(not (= (+ (select q2 q2_back) 1) j))] [2022-03-15 21:49:48,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:49:48,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:49:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:49:48,333 INFO L87 Difference]: Start difference. First operand 234 states and 671 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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) [2022-03-15 21:49:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:48,517 INFO L93 Difference]: Finished difference Result 188 states and 530 transitions. [2022-03-15 21:49:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:49:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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) Word has length 22 [2022-03-15 21:49:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:48,518 INFO L225 Difference]: With dead ends: 188 [2022-03-15 21:49:48,519 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 21:49:48,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:49:48,519 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:48,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:49:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 21:49:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-03-15 21:49:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.834224598930481) internal successors, (530), 187 states have internal predecessors, (530), 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) [2022-03-15 21:49:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 530 transitions. [2022-03-15 21:49:48,525 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 530 transitions. Word has length 22 [2022-03-15 21:49:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:48,525 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 530 transitions. [2022-03-15 21:49:48,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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) [2022-03-15 21:49:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 530 transitions. [2022-03-15 21:49:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:49:48,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:48,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:48,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:48,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:48,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1082516259, now seen corresponding path program 5 times [2022-03-15 21:49:48,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:48,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464733410] [2022-03-15 21:49:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:48,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:48,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464733410] [2022-03-15 21:49:48,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464733410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:48,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351883653] [2022-03-15 21:49:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:49:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:48,879 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) [2022-03-15 21:49:48,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 21:49:48,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:49:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:49:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:48,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:49,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:49:49,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 21:49:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:49,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:49,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:49,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-15 21:49:49,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:49,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 21:49:49,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:49,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 21:49:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:49,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351883653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:49,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:49,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-15 21:49:49,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [243505108] [2022-03-15 21:49:49,546 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:49,549 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:49,560 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 97 transitions. [2022-03-15 21:49:49,560 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:50,808 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4712#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)) (<= (+ (select q2 q2_front) r) 1)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (+ (select q2 q2_front) r)) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)))), 4713#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (select q2 q2_front)) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)) (<= (select q2 q2_front) 1))), 4710#(and (or (not (= (+ (select q2 q2_back) 1) j)) (<= (+ (select q2 q2_front) r) 1)) (or (<= 1 (+ (select q2 q2_front) r)) (not (= (+ (select q2 q2_back) 1) j))) (or (= q3_back q3_front) (not (= (+ (select q2 q2_back) 1) j)))), 4711#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= q1_back q1_front)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (+ (select q2 q2_front) r)) (<= q1_back q1_front)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q1_back q1_front) (<= (+ (select q2 q2_front) r) 1)))] [2022-03-15 21:49:50,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:49:50,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:49:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:49:50,809 INFO L87 Difference]: Start difference. First operand 188 states and 530 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2022-03-15 21:49:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:51,012 INFO L93 Difference]: Finished difference Result 229 states and 623 transitions. [2022-03-15 21:49:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:49:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) Word has length 24 [2022-03-15 21:49:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:51,014 INFO L225 Difference]: With dead ends: 229 [2022-03-15 21:49:51,014 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 21:49:51,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:49:51,015 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:51,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:49:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 21:49:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2022-03-15 21:49:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8268156424581004) internal successors, (506), 179 states have internal predecessors, (506), 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) [2022-03-15 21:49:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 506 transitions. [2022-03-15 21:49:51,019 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 506 transitions. Word has length 24 [2022-03-15 21:49:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:51,019 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 506 transitions. [2022-03-15 21:49:51,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2022-03-15 21:49:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 506 transitions. [2022-03-15 21:49:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:49:51,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:51,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:51,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:51,239 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash 490995512, now seen corresponding path program 6 times [2022-03-15 21:49:51,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:51,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639743343] [2022-03-15 21:49:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:51,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:51,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:51,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639743343] [2022-03-15 21:49:51,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639743343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:51,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:49:51,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 21:49:51,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1975202657] [2022-03-15 21:49:51,276 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:51,279 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:51,290 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 103 transitions. [2022-03-15 21:49:51,290 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:51,466 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:51,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:49:51,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:49:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:49:51,467 INFO L87 Difference]: Start difference. First operand 180 states and 506 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-03-15 21:49:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:51,513 INFO L93 Difference]: Finished difference Result 371 states and 1050 transitions. [2022-03-15 21:49:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:49:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) Word has length 26 [2022-03-15 21:49:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:51,516 INFO L225 Difference]: With dead ends: 371 [2022-03-15 21:49:51,516 INFO L226 Difference]: Without dead ends: 371 [2022-03-15 21:49:51,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:49:51,517 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:51,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-15 21:49:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 309. [2022-03-15 21:49:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 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) [2022-03-15 21:49:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2022-03-15 21:49:51,527 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 26 [2022-03-15 21:49:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:51,527 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2022-03-15 21:49:51,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-03-15 21:49:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2022-03-15 21:49:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:49:51,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:51,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:51,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 21:49:51,532 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -986972872, now seen corresponding path program 7 times [2022-03-15 21:49:51,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:51,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746253865] [2022-03-15 21:49:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:51,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:51,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746253865] [2022-03-15 21:49:51,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746253865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:51,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030112749] [2022-03-15 21:49:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:49:51,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:51,591 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) [2022-03-15 21:49:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 21:49:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:49:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:49:51,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:49:51,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030112749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:49:51,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:49:51,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-15 21:49:51,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250341468] [2022-03-15 21:49:51,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:51,684 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:51,694 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 99 transitions. [2022-03-15 21:49:51,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:51,914 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:49:51,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:49:51,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:49:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:49:51,915 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-15 21:49:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:51,937 INFO L93 Difference]: Finished difference Result 95 states and 171 transitions. [2022-03-15 21:49:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:49:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 26 [2022-03-15 21:49:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:51,938 INFO L225 Difference]: With dead ends: 95 [2022-03-15 21:49:51,938 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 21:49:51,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:49:51,939 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:51,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:49:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 21:49:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2022-03-15 21:49:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.88) internal successors, (141), 75 states have internal predecessors, (141), 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) [2022-03-15 21:49:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 141 transitions. [2022-03-15 21:49:51,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 141 transitions. Word has length 26 [2022-03-15 21:49:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 141 transitions. [2022-03-15 21:49:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-15 21:49:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 141 transitions. [2022-03-15 21:49:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:49:51,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:51,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:51,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 21:49:52,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 21:49:52,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1177017966, now seen corresponding path program 8 times [2022-03-15 21:49:52,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:52,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794123971] [2022-03-15 21:49:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:52,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:52,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794123971] [2022-03-15 21:49:52,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794123971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:52,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139681936] [2022-03-15 21:49:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:49:52,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:52,241 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) [2022-03-15 21:49:52,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 21:49:52,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:49:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:49:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:52,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:52,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:52,381 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:49:52,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 21:49:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:52,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139681936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:52,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:52,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-15 21:49:52,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [351252138] [2022-03-15 21:49:52,406 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:52,408 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:52,418 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 95 transitions. [2022-03-15 21:49:52,418 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:52,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-15 21:49:52,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6793#(not (= (select q1 q1_back) 0)), 6789#(or (= (+ q1_front 1) q1_back) (not f) (<= q1_back q1_front)), 6794#(or f (not (= (select q1 q1_back) 0))), 6791#(or (= q1_front q1_back) (<= (+ q1_back 1) q1_front) (not f) (not (= (select q1 q1_back) 2))), 6790#(or (= (+ q1_front 1) q1_back) (<= q1_back q1_front)), 6792#(or (= q1_front q1_back) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)))] [2022-03-15 21:49:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:49:52,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:49:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:49:52,760 INFO L87 Difference]: Start difference. First operand 76 states and 141 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-03-15 21:49:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:52,910 INFO L93 Difference]: Finished difference Result 70 states and 123 transitions. [2022-03-15 21:49:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:49:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) Word has length 26 [2022-03-15 21:49:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:52,911 INFO L225 Difference]: With dead ends: 70 [2022-03-15 21:49:52,911 INFO L226 Difference]: Without dead ends: 70 [2022-03-15 21:49:52,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:49:52,912 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 82 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:52,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 2 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:49:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-15 21:49:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-15 21:49:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 69 states have internal predecessors, (123), 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) [2022-03-15 21:49:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 123 transitions. [2022-03-15 21:49:52,914 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 123 transitions. Word has length 26 [2022-03-15 21:49:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:52,914 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 123 transitions. [2022-03-15 21:49:52,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-03-15 21:49:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 123 transitions. [2022-03-15 21:49:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:49:52,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:52,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:52,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:53,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:53,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash -619807492, now seen corresponding path program 9 times [2022-03-15 21:49:53,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:53,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354825560] [2022-03-15 21:49:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:53,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:53,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354825560] [2022-03-15 21:49:53,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354825560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:53,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156156717] [2022-03-15 21:49:53,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:49:53,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:53,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:53,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:49:53,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 21:49:53,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:49:53,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:49:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:53,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 21:49:53,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:49:53,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:49:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:49:53,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:53,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:53,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 21:49:53,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:53,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 21:49:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:53,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156156717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:53,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:53,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2022-03-15 21:49:53,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [841388553] [2022-03-15 21:49:53,946 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:53,949 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:53,959 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 97 transitions. [2022-03-15 21:49:53,959 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:55,033 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [7207#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 0))), 7203#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= (+ q1_front 1) q1_back) (<= q1_back q1_front)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_back q2_front) (not (< q1_front q1_back))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_front q2_back) (not (< q1_front q1_back)))), 7204#(and (or (= (+ q1_front 1) (+ q1_back 1)) (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)) (<= q2_front q2_back)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_back q2_front) (not (= (select q1 q1_back) 2)) (not (< q1_front (+ q1_back 1))))), 7205#(not (= (+ (select q2 q2_back) 1) j)), 7206#(or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q1_back q1_front)), 7202#(and (or (not (= (+ (select q2 q2_back) 1) j)) (<= q2_front q2_back)) (or (not (= (+ (select q2 q2_back) 1) j)) (= (+ (* (- 1) q1_front) q1_back) 0)) (or (not (= (+ (select q2 q2_back) 1) j)) (<= q2_back q2_front)))] [2022-03-15 21:49:55,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:49:55,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:49:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:49:55,035 INFO L87 Difference]: Start difference. First operand 70 states and 123 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-03-15 21:49:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:55,458 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2022-03-15 21:49:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:49:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) Word has length 28 [2022-03-15 21:49:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:55,459 INFO L225 Difference]: With dead ends: 64 [2022-03-15 21:49:55,459 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 21:49:55,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:49:55,460 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 61 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:55,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:49:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 21:49:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-15 21:49:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 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) [2022-03-15 21:49:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2022-03-15 21:49:55,462 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 28 [2022-03-15 21:49:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:55,462 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2022-03-15 21:49:55,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-03-15 21:49:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2022-03-15 21:49:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:49:55,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:55,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:55,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:55,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:55,676 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1362273298, now seen corresponding path program 10 times [2022-03-15 21:49:55,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:55,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746148777] [2022-03-15 21:49:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:49:56,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:56,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746148777] [2022-03-15 21:49:56,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746148777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:56,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509952620] [2022-03-15 21:49:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:49:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:56,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:49:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 21:49:56,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:49:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:49:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:56,528 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 21:49:56,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-03-15 21:49:56,652 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:49:56,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 21:49:56,764 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:49:56,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2022-03-15 21:49:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:56,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:57,301 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:49:57,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 69 [2022-03-15 21:49:57,796 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:49:57,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 84 [2022-03-15 21:49:58,453 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:49:58,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 108 [2022-03-15 21:49:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:58,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509952620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:58,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:58,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 37 [2022-03-15 21:49:58,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1167305117] [2022-03-15 21:49:58,878 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:58,881 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:58,892 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 103 transitions. [2022-03-15 21:49:58,892 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:50:00,683 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7639#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (+ (select q2 q2_front) r)) (not (= (select q1 q1_back) 2)) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (not (= (select q1 q1_back) 2)) (<= (+ (select q2 q2_front) r) 1) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (not (= (select q1 q1_back) 2)) (<= q2_front q2_back) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_back q2_front) (not (= (select q1 q1_back) 2)) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q1_front q1_back) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)))), 7637#(and (or (not (= (+ (select q2 q2_back) 1) j)) (<= (+ (select q2 q2_front) r) 1)) (or (<= 1 (+ (select q2 q2_front) r)) (not (= (+ (select q2 q2_back) 1) j))) (or (= (+ q3_back (* (- 1) q3_front)) 0) (not (= (+ (select q2 q2_back) 1) j))) (or (not (= (+ (select q2 q2_back) 1) j)) (<= q2_front q2_back)) (or (not (= (+ (select q2 q2_back) 1) j)) (= (+ (* (- 1) q1_front) q1_back) 0)) (or (not (= (+ (select q2 q2_back) 1) j)) (<= q2_back q2_front))), 7640#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (not (= (select q1 q1_back) 2)) (<= q2_front q2_back) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_back q2_front) (not (= (select q1 q1_back) 2)) (not (< q1_front (+ q1_back 1)))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q1_front q1_back) (<= (+ q1_back 1) q1_front) (not (= (select q1 q1_back) 2)))), 7638#(and (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= q3_back q3_front) (<= q1_back q1_front)) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= (+ (select q2 q2_front) r) 1) (not (< q1_front q1_back))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (= (+ (- 1) (* (- 1) q1_front) q1_back) 0) (not (< q1_front q1_back))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_back q2_front) (not (< q1_front q1_back))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= 1 (+ (select q2 q2_front) r)) (not (< q1_front q1_back))) (or (not (= (+ (select q2 q2_back) 1) (select q1 q1_front))) (<= q2_front q2_back) (not (< q1_front q1_back))))] [2022-03-15 21:50:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:50:00,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:50:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:50:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:50:00,685 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2022-03-15 21:50:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:50:00,964 INFO L93 Difference]: Finished difference Result 63 states and 103 transitions. [2022-03-15 21:50:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:50:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) Word has length 30 [2022-03-15 21:50:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:50:00,965 INFO L225 Difference]: With dead ends: 63 [2022-03-15 21:50:00,965 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 21:50:00,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:50:00,966 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:50:00,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:50:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 21:50:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 21:50:00,969 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) [2022-03-15 21:50:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 21:50:00,969 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-03-15 21:50:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:50:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 21:50:00,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2022-03-15 21:50:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 21:50:00,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 21:50:00,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 21:50:00,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 21:50:00,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 21:50:00,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 21:50:00,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 21:50:01,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 21:50:01,174 INFO L732 BasicCegarLoop]: Path program histogram: [10, 2, 1, 1] [2022-03-15 21:50:01,176 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:50:01,176 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:50:01,178 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:50:01 BasicIcfg [2022-03-15 21:50:01,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:50:01,178 INFO L158 Benchmark]: Toolchain (without parser) took 18967.79ms. Allocated memory was 190.8MB in the beginning and 275.8MB in the end (delta: 84.9MB). Free memory was 155.0MB in the beginning and 226.7MB in the end (delta: -71.8MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-03-15 21:50:01,178 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 190.8MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:50:01,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.47ms. Allocated memory is still 190.8MB. Free memory was 155.0MB in the beginning and 153.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:50:01,179 INFO L158 Benchmark]: Boogie Preprocessor took 13.50ms. Allocated memory is still 190.8MB. Free memory was 153.4MB in the beginning and 152.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:50:01,179 INFO L158 Benchmark]: RCFGBuilder took 243.93ms. Allocated memory is still 190.8MB. Free memory was 152.3MB in the beginning and 141.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 21:50:01,179 INFO L158 Benchmark]: TraceAbstraction took 18675.65ms. Allocated memory was 190.8MB in the beginning and 275.8MB in the end (delta: 84.9MB). Free memory was 141.2MB in the beginning and 226.7MB in the end (delta: -85.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:50:01,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 190.8MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.47ms. Allocated memory is still 190.8MB. Free memory was 155.0MB in the beginning and 153.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.50ms. Allocated memory is still 190.8MB. Free memory was 153.4MB in the beginning and 152.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 243.93ms. Allocated memory is still 190.8MB. Free memory was 152.3MB in the beginning and 141.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 18675.65ms. Allocated memory was 190.8MB in the beginning and 275.8MB in the end (delta: 84.9MB). Free memory was 141.2MB in the beginning and 226.7MB in the end (delta: -85.5MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.6s, 49 PlacesBefore, 31 PlacesAfterwards, 42 TransitionsBefore, 24 TransitionsAfterwards, 634 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 16 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 19 TotalNumberOfCompositions, 635 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 535, positive: 516, positive conditional: 0, positive unconditional: 516, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 323, positive: 313, positive conditional: 0, positive unconditional: 313, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 535, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 323, unknown conditional: 0, unknown unconditional: 323] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 53, Positive conditional cache size: 0, Positive unconditional cache size: 53, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 18.5s, OverallIterations: 14, TraceHistogramMax: 3, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.7s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 470 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 470 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1165 mSDsCounter, 134 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2043 IncrementalHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 134 mSolverCounterUnsat, 14 mSDtfsCounter, 2043 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 975 GetRequests, 764 SyntacticMatches, 26 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=309occurred in iteration=10, InterpolantAutomatonStates: 94, 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, 14 MinimizatonAttempts, 164 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 506 NumberOfCodeBlocks, 506 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 628 ConstructedInterpolants, 1 QuantifiedInterpolants, 4916 SizeOfPredicates, 50 NumberOfNonLiveVariables, 979 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 98/262 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 21:50:01,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...