/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:36:32,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:36:32,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:36:32,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:36:32,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:36:33,021 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:36:33,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:36:33,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:36:33,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:36:33,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:36:33,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:36:33,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:36:33,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:36:33,024 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:36:33,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:36:33,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:36:33,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:36:33,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:36:33,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:36:33,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:36:33,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:36:33,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:36:33,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:36:33,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:36:33,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:36:33,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:36:33,238 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:36:33,240 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:36:33,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2022-03-15 16:36:33,242 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2022-03-15 16:36:33,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:36:33,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:36:33,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:36:33,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:36:33,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:36:33,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,279 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:36:33,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:36:33,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:36:33,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:36:33,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:36:33,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:36:33,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:36:33,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:36:33,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:36:33,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/1) ... [2022-03-15 16:36:33,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:36:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:33,325 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 16:36:33,332 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 16:36:33,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:36:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:36:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:36:33,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:36:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:36:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:36:33,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:36:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:36:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:36:33,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:36:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:36:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:36:33,356 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 16:36:33,393 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:36:33,394 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:36:33,458 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:36:33,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:36:33,470 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:36:33,471 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:36:33 BoogieIcfgContainer [2022-03-15 16:36:33,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:36:33,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:36:33,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:36:33,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:36:33,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:33" (1/2) ... [2022-03-15 16:36:33,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f225320 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:36:33, skipping insertion in model container [2022-03-15 16:36:33,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:36:33" (2/2) ... [2022-03-15 16:36:33,476 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2022-03-15 16:36:33,480 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:36:33,480 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:36:33,480 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:36:33,480 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:36:33,519 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:36:33,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:36:33,574 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:36:33,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:36:33,593 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2022-03-15 16:36:33,634 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 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 16:36:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 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 16:36:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:36:33,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:33,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:33,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash -511251252, now seen corresponding path program 1 times [2022-03-15 16:36:33,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:33,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811965335] [2022-03-15 16:36:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:33,872 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 16:36:33,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:33,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811965335] [2022-03-15 16:36:33,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811965335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:33,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:33,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:36:33,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416049596] [2022-03-15 16:36:33,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:36:33,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:33,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:36:33,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:36:33,898 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 16:36:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:33,932 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2022-03-15 16:36:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:36:33,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 16:36:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:33,969 INFO L225 Difference]: With dead ends: 215 [2022-03-15 16:36:33,969 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 16:36:33,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:36:33,973 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:33,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 16:36:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-03-15 16:36:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 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 16:36:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2022-03-15 16:36:34,018 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2022-03-15 16:36:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:34,018 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2022-03-15 16:36:34,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 16:36:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2022-03-15 16:36:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:34,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:34,020 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 16:36:34,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:36:34,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 74019820, now seen corresponding path program 1 times [2022-03-15 16:36:34,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:34,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493636315] [2022-03-15 16:36:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:34,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:34,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493636315] [2022-03-15 16:36:34,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493636315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:34,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641099999] [2022-03-15 16:36:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:34,067 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 16:36:34,068 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 16:36:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:34,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:36:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:34,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:34,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641099999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:34,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:34,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 16:36:34,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746110103] [2022-03-15 16:36:34,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:34,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:34,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:34,254 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 16:36:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:34,391 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2022-03-15 16:36:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 18 [2022-03-15 16:36:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:34,397 INFO L225 Difference]: With dead ends: 345 [2022-03-15 16:36:34,397 INFO L226 Difference]: Without dead ends: 345 [2022-03-15 16:36:34,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:36:34,398 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:34,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-15 16:36:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2022-03-15 16:36:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 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 16:36:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2022-03-15 16:36:34,420 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2022-03-15 16:36:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:34,421 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2022-03-15 16:36:34,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 16:36:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2022-03-15 16:36:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:34,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:34,433 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 16:36:34,449 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 16:36:34,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:34,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 132722862, now seen corresponding path program 1 times [2022-03-15 16:36:34,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:34,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719991550] [2022-03-15 16:36:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:34,670 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 16:36:34,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:34,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719991550] [2022-03-15 16:36:34,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719991550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:34,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:34,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:34,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094325031] [2022-03-15 16:36:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:34,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:36:34,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:36:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:36:34,673 INFO L87 Difference]: Start difference. First operand 174 states and 511 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:34,766 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2022-03-15 16:36:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:36:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:34,770 INFO L225 Difference]: With dead ends: 242 [2022-03-15 16:36:34,770 INFO L226 Difference]: Without dead ends: 232 [2022-03-15 16:36:34,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:34,771 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:34,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-15 16:36:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2022-03-15 16:36:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 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 16:36:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2022-03-15 16:36:34,789 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2022-03-15 16:36:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:34,790 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2022-03-15 16:36:34,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2022-03-15 16:36:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:34,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:34,791 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 16:36:34,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:36:34,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1683104426, now seen corresponding path program 1 times [2022-03-15 16:36:34,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:34,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909902826] [2022-03-15 16:36:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:34,851 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 16:36:34,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:34,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909902826] [2022-03-15 16:36:34,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909902826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:34,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:34,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:34,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119061346] [2022-03-15 16:36:34,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:36:34,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:36:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:36:34,853 INFO L87 Difference]: Start difference. First operand 190 states and 537 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:34,908 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2022-03-15 16:36:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:36:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:34,909 INFO L225 Difference]: With dead ends: 325 [2022-03-15 16:36:34,910 INFO L226 Difference]: Without dead ends: 307 [2022-03-15 16:36:34,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:34,911 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:34,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-15 16:36:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2022-03-15 16:36:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 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 16:36:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2022-03-15 16:36:34,922 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2022-03-15 16:36:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:34,922 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2022-03-15 16:36:34,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2022-03-15 16:36:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:34,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:34,924 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 16:36:34,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:36:34,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 105060458, now seen corresponding path program 2 times [2022-03-15 16:36:34,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:34,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713244255] [2022-03-15 16:36:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:34,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:34,966 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 16:36:34,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:34,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713244255] [2022-03-15 16:36:34,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713244255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:34,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:34,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:36:34,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577891896] [2022-03-15 16:36:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:34,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:36:34,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:36:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:34,967 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,018 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2022-03-15 16:36:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:36:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,020 INFO L225 Difference]: With dead ends: 277 [2022-03-15 16:36:35,020 INFO L226 Difference]: Without dead ends: 265 [2022-03-15 16:36:35,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:35,021 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-15 16:36:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2022-03-15 16:36:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 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 16:36:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2022-03-15 16:36:35,030 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2022-03-15 16:36:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,030 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2022-03-15 16:36:35,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2022-03-15 16:36:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:35,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,031 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 16:36:35,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:36:35,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash 671200524, now seen corresponding path program 2 times [2022-03-15 16:36:35,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795665303] [2022-03-15 16:36:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,051 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 16:36:35,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795665303] [2022-03-15 16:36:35,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795665303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:35,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:35,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:35,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210024239] [2022-03-15 16:36:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:35,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:36:35,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:36:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:36:35,053 INFO L87 Difference]: Start difference. First operand 212 states and 598 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,093 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2022-03-15 16:36:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:36:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,095 INFO L225 Difference]: With dead ends: 275 [2022-03-15 16:36:35,095 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 16:36:35,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:35,096 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 16:36:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2022-03-15 16:36:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 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 16:36:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2022-03-15 16:36:35,103 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2022-03-15 16:36:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,104 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2022-03-15 16:36:35,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2022-03-15 16:36:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:35,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,104 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 16:36:35,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 16:36:35,105 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash -945431028, now seen corresponding path program 3 times [2022-03-15 16:36:35,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993003838] [2022-03-15 16:36:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,137 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 16:36:35,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993003838] [2022-03-15 16:36:35,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993003838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:35,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:35,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:35,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354276527] [2022-03-15 16:36:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:35,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:36:35,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:36:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:36:35,139 INFO L87 Difference]: Start difference. First operand 215 states and 610 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,165 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2022-03-15 16:36:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:36:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,167 INFO L225 Difference]: With dead ends: 222 [2022-03-15 16:36:35,167 INFO L226 Difference]: Without dead ends: 222 [2022-03-15 16:36:35,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:36:35,168 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-15 16:36:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2022-03-15 16:36:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 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 16:36:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2022-03-15 16:36:35,174 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2022-03-15 16:36:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,174 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2022-03-15 16:36:35,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2022-03-15 16:36:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:35,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,175 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 16:36:35,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 16:36:35,176 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2121095062, now seen corresponding path program 4 times [2022-03-15 16:36:35,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984281923] [2022-03-15 16:36:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,206 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 16:36:35,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984281923] [2022-03-15 16:36:35,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984281923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:35,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:35,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:35,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185276137] [2022-03-15 16:36:35,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:35,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:36:35,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:36:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:36:35,208 INFO L87 Difference]: Start difference. First operand 213 states and 608 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,236 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2022-03-15 16:36:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:36:35,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,238 INFO L225 Difference]: With dead ends: 226 [2022-03-15 16:36:35,238 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 16:36:35,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:36:35,238 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 16:36:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2022-03-15 16:36:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 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 16:36:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2022-03-15 16:36:35,244 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2022-03-15 16:36:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2022-03-15 16:36:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 16:36:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2022-03-15 16:36:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:35,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,245 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 16:36:35,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 16:36:35,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash -552220694, now seen corresponding path program 5 times [2022-03-15 16:36:35,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89941656] [2022-03-15 16:36:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,284 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 16:36:35,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89941656] [2022-03-15 16:36:35,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89941656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:35,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:35,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:36:35,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212461274] [2022-03-15 16:36:35,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:36:35,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:36:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:35,286 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,320 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2022-03-15 16:36:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:36:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,322 INFO L225 Difference]: With dead ends: 212 [2022-03-15 16:36:35,322 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 16:36:35,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:36:35,325 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 16:36:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2022-03-15 16:36:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 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 16:36:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2022-03-15 16:36:35,331 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2022-03-15 16:36:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2022-03-15 16:36:35,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:36:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2022-03-15 16:36:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:36:35,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,332 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 16:36:35,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 16:36:35,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -62492722, now seen corresponding path program 1 times [2022-03-15 16:36:35,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918630709] [2022-03-15 16:36:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:35,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918630709] [2022-03-15 16:36:35,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918630709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128488413] [2022-03-15 16:36:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:35,392 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 16:36:35,405 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 16:36:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:36:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:35,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128488413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:35,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:35,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 16:36:35,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222857454] [2022-03-15 16:36:35,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:35,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:35,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:35,542 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 16:36:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:35,590 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2022-03-15 16:36:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 16:36:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:35,593 INFO L225 Difference]: With dead ends: 251 [2022-03-15 16:36:35,593 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 16:36:35,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:36:35,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:35,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 16:36:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2022-03-15 16:36:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 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 16:36:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2022-03-15 16:36:35,611 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2022-03-15 16:36:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:35,611 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2022-03-15 16:36:35,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 16:36:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2022-03-15 16:36:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:35,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:35,612 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, 1, 1] [2022-03-15 16:36:35,631 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 16:36:35,828 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,SelfDestructingSolverStorable9 [2022-03-15 16:36:35,828 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -851645140, now seen corresponding path program 1 times [2022-03-15 16:36:35,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:35,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110997355] [2022-03-15 16:36:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:35,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:35,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110997355] [2022-03-15 16:36:35,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110997355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:35,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239035418] [2022-03-15 16:36:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:35,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:35,898 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 16:36:35,899 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 16:36:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:36,181 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 22 treesize of output 18 [2022-03-15 16:36:36,183 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 14 [2022-03-15 16:36:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:36,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:36,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:36,275 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 20 [2022-03-15 16:36:36,298 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 15 treesize of output 9 [2022-03-15 16:36:36,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:36,335 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 17 [2022-03-15 16:36:36,348 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 12 treesize of output 5 [2022-03-15 16:36:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:36,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239035418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:36,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:36,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:36:36,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967319693] [2022-03-15 16:36:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:36,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:36,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:36,396 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:36,486 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2022-03-15 16:36:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:36,488 INFO L225 Difference]: With dead ends: 377 [2022-03-15 16:36:36,488 INFO L226 Difference]: Without dead ends: 362 [2022-03-15 16:36:36,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:36,489 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:36,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-15 16:36:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2022-03-15 16:36:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 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 16:36:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2022-03-15 16:36:36,496 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2022-03-15 16:36:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:36,496 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2022-03-15 16:36:36,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2022-03-15 16:36:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:36,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:36,498 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, 1, 1] [2022-03-15 16:36:36,514 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 16:36:36,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:36,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1414924140, now seen corresponding path program 2 times [2022-03-15 16:36:36,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:36,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306016804] [2022-03-15 16:36:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:36,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:36,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:36,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306016804] [2022-03-15 16:36:36,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306016804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:36,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157387012] [2022-03-15 16:36:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:36,818 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 16:36:36,834 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 16:36:36,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:36,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:37,021 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 15 treesize of output 11 [2022-03-15 16:36:37,040 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 17 treesize of output 13 [2022-03-15 16:36:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:37,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:37,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:37,150 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 20 [2022-03-15 16:36:37,161 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 15 treesize of output 9 [2022-03-15 16:36:37,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:37,198 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 17 [2022-03-15 16:36:37,209 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 12 treesize of output 5 [2022-03-15 16:36:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:37,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157387012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:37,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:37,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:36:37,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025555164] [2022-03-15 16:36:37,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:37,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:37,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:37,258 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 16:36:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:37,342 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2022-03-15 16:36:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 16:36:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:37,344 INFO L225 Difference]: With dead ends: 402 [2022-03-15 16:36:37,344 INFO L226 Difference]: Without dead ends: 387 [2022-03-15 16:36:37,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:37,345 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:37,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-15 16:36:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2022-03-15 16:36:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 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 16:36:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2022-03-15 16:36:37,352 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2022-03-15 16:36:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:37,352 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2022-03-15 16:36:37,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 16:36:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2022-03-15 16:36:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:37,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:37,353 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, 1, 1] [2022-03-15 16:36:37,385 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 16:36:37,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:37,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1944109140, now seen corresponding path program 3 times [2022-03-15 16:36:37,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:37,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652229470] [2022-03-15 16:36:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:37,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:37,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652229470] [2022-03-15 16:36:37,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652229470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:37,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895669480] [2022-03-15 16:36:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:37,668 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 16:36:37,703 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 16:36:37,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:36:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:37,897 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 20 treesize of output 14 [2022-03-15 16:36:37,899 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 20 treesize of output 14 [2022-03-15 16:36:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:37,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:37,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:37,990 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 20 [2022-03-15 16:36:38,001 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 15 treesize of output 9 [2022-03-15 16:36:38,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:38,021 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 17 [2022-03-15 16:36:38,036 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 12 treesize of output 5 [2022-03-15 16:36:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:38,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895669480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:38,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:38,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:36:38,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513693333] [2022-03-15 16:36:38,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:38,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:38,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:38,090 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:38,214 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2022-03-15 16:36:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:38,216 INFO L225 Difference]: With dead ends: 461 [2022-03-15 16:36:38,216 INFO L226 Difference]: Without dead ends: 446 [2022-03-15 16:36:38,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:38,217 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:38,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-03-15 16:36:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2022-03-15 16:36:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 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 16:36:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-03-15 16:36:38,225 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2022-03-15 16:36:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-03-15 16:36:38,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-03-15 16:36:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:38,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:38,228 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, 1, 1] [2022-03-15 16:36:38,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:38,444 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,SelfDestructingSolverStorable12 [2022-03-15 16:36:38,445 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1813144784, now seen corresponding path program 4 times [2022-03-15 16:36:38,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:38,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290245334] [2022-03-15 16:36:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:38,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:38,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290245334] [2022-03-15 16:36:38,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290245334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:38,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070480786] [2022-03-15 16:36:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:38,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:38,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:38,544 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 16:36:38,545 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 16:36:38,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:38,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:38,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:38,703 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 25 treesize of output 19 [2022-03-15 16:36:38,714 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 20 treesize of output 14 [2022-03-15 16:36:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:38,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:38,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:38,797 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 16 treesize of output 21 [2022-03-15 16:36:38,808 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 15 treesize of output 9 [2022-03-15 16:36:38,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:38,845 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 17 [2022-03-15 16:36:38,855 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 13 treesize of output 6 [2022-03-15 16:36:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:38,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070480786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:38,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:38,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:36:38,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702143975] [2022-03-15 16:36:38,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:38,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:38,914 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:38,999 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-03-15 16:36:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:39,001 INFO L225 Difference]: With dead ends: 435 [2022-03-15 16:36:39,001 INFO L226 Difference]: Without dead ends: 420 [2022-03-15 16:36:39,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:39,002 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:39,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-15 16:36:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2022-03-15 16:36:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 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 16:36:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2022-03-15 16:36:39,009 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2022-03-15 16:36:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:39,009 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2022-03-15 16:36:39,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2022-03-15 16:36:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:39,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:39,010 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, 1, 1] [2022-03-15 16:36:39,039 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 16:36:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:39,226 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1947787600, now seen corresponding path program 5 times [2022-03-15 16:36:39,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:39,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022282864] [2022-03-15 16:36:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:39,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:39,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022282864] [2022-03-15 16:36:39,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022282864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:39,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114314734] [2022-03-15 16:36:39,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:39,289 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 16:36:39,290 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 16:36:39,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:39,430 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 21 treesize of output 17 [2022-03-15 16:36:39,463 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 19 treesize of output 15 [2022-03-15 16:36:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:39,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:39,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:39,585 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 23 [2022-03-15 16:36:39,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:39,590 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 19 [2022-03-15 16:36:39,611 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 18 treesize of output 12 [2022-03-15 16:36:39,614 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 12 treesize of output 5 [2022-03-15 16:36:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:39,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114314734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:39,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:39,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:36:39,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930147125] [2022-03-15 16:36:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:39,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:36:39,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:36:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:39,676 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 16:36:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:39,764 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2022-03-15 16:36:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 16:36:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:39,767 INFO L225 Difference]: With dead ends: 471 [2022-03-15 16:36:39,767 INFO L226 Difference]: Without dead ends: 456 [2022-03-15 16:36:39,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:39,768 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-15 16:36:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2022-03-15 16:36:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 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 16:36:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-03-15 16:36:39,776 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-03-15 16:36:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:39,776 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-03-15 16:36:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 16:36:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-03-15 16:36:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:36:39,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:39,777 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, 1, 1] [2022-03-15 16:36:39,796 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 16:36:39,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:39,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1359688084, now seen corresponding path program 6 times [2022-03-15 16:36:39,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:39,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707210320] [2022-03-15 16:36:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:40,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:40,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707210320] [2022-03-15 16:36:40,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707210320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:40,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931560637] [2022-03-15 16:36:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:40,084 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 16:36:40,103 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 16:36:40,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:36:40,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:40,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:36:40,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:40,263 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 21 treesize of output 17 [2022-03-15 16:36:40,276 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 20 treesize of output 14 [2022-03-15 16:36:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:40,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:40,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:40,388 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 19 treesize of output 24 [2022-03-15 16:36:40,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:36:40,393 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 20 [2022-03-15 16:36:40,417 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 18 treesize of output 12 [2022-03-15 16:36:40,420 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 12 treesize of output 5 [2022-03-15 16:36:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:40,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931560637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:40,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:40,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:36:40,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155909968] [2022-03-15 16:36:40,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:36:40,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:36:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:40,482 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 16:36:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:40,608 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2022-03-15 16:36:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:36:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 16:36:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:40,611 INFO L225 Difference]: With dead ends: 463 [2022-03-15 16:36:40,611 INFO L226 Difference]: Without dead ends: 448 [2022-03-15 16:36:40,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:40,611 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:40,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-15 16:36:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2022-03-15 16:36:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 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 16:36:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-03-15 16:36:40,619 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-03-15 16:36:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:40,619 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-03-15 16:36:40,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 16:36:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-03-15 16:36:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:40,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:40,620 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, 1, 1] [2022-03-15 16:36:40,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 16:36:40,840 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,SelfDestructingSolverStorable15 [2022-03-15 16:36:40,841 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1997398602, now seen corresponding path program 7 times [2022-03-15 16:36:40,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:40,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733957101] [2022-03-15 16:36:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:40,869 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 16:36:40,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:40,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733957101] [2022-03-15 16:36:40,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733957101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:40,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353931821] [2022-03-15 16:36:40,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:40,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:40,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:40,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:40,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:36:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:40,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:40,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353931821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:40,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:40,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 16:36:40,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987340202] [2022-03-15 16:36:40,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:40,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:36:40,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:36:40,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:36:40,975 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:41,096 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2022-03-15 16:36:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:41,100 INFO L225 Difference]: With dead ends: 800 [2022-03-15 16:36:41,100 INFO L226 Difference]: Without dead ends: 800 [2022-03-15 16:36:41,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:36:41,101 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:41,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-03-15 16:36:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2022-03-15 16:36:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 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 16:36:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2022-03-15 16:36:41,112 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2022-03-15 16:36:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:41,112 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2022-03-15 16:36:41,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2022-03-15 16:36:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:41,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:41,113 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, 1, 1] [2022-03-15 16:36:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:41,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:36:41,330 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1419061262, now seen corresponding path program 8 times [2022-03-15 16:36:41,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:41,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365862780] [2022-03-15 16:36:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:41,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:41,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365862780] [2022-03-15 16:36:41,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365862780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:41,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083005599] [2022-03-15 16:36:41,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:41,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:41,366 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:41,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:36:41,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:36:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:41,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:41,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083005599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:41,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:41,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:36:41,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397421228] [2022-03-15 16:36:41,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:41,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:36:41,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:36:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:41,524 INFO L87 Difference]: Start difference. First operand 428 states and 1322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:41,881 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2022-03-15 16:36:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:36:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:41,886 INFO L225 Difference]: With dead ends: 1302 [2022-03-15 16:36:41,887 INFO L226 Difference]: Without dead ends: 1252 [2022-03-15 16:36:41,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:36:41,887 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 260 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:41,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 71 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:36:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-03-15 16:36:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2022-03-15 16:36:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 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 16:36:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2022-03-15 16:36:41,907 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2022-03-15 16:36:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2022-03-15 16:36:41,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2022-03-15 16:36:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:41,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:41,910 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, 1, 1] [2022-03-15 16:36:41,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:42,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:36:42,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 982092554, now seen corresponding path program 9 times [2022-03-15 16:36:42,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:42,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830645145] [2022-03-15 16:36:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:42,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830645145] [2022-03-15 16:36:42,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830645145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:42,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161333480] [2022-03-15 16:36:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:42,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:42,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:42,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:36:42,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:36:42,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161333480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:42,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:42,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 16:36:42,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116299155] [2022-03-15 16:36:42,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:36:42,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:36:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:36:42,272 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:42,364 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2022-03-15 16:36:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:42,370 INFO L225 Difference]: With dead ends: 1440 [2022-03-15 16:36:42,370 INFO L226 Difference]: Without dead ends: 1297 [2022-03-15 16:36:42,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:42,371 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:42,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 51 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-03-15 16:36:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2022-03-15 16:36:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 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 16:36:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2022-03-15 16:36:42,393 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2022-03-15 16:36:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2022-03-15 16:36:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2022-03-15 16:36:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:42,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:42,395 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, 1, 1] [2022-03-15 16:36:42,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:42,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:42,612 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1416074220, now seen corresponding path program 10 times [2022-03-15 16:36:42,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:42,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634815155] [2022-03-15 16:36:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:42,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634815155] [2022-03-15 16:36:42,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634815155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:42,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718077764] [2022-03-15 16:36:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:42,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:42,651 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:42,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:36:42,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:42,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718077764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:42,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:42,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:42,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984701184] [2022-03-15 16:36:42,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:42,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:42,752 INFO L87 Difference]: Start difference. First operand 986 states and 3247 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:42,830 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2022-03-15 16:36:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:36:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:42,835 INFO L225 Difference]: With dead ends: 1349 [2022-03-15 16:36:42,836 INFO L226 Difference]: Without dead ends: 1343 [2022-03-15 16:36:42,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:36:42,837 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:42,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-03-15 16:36:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2022-03-15 16:36:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 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 16:36:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2022-03-15 16:36:42,862 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2022-03-15 16:36:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2022-03-15 16:36:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2022-03-15 16:36:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:42,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:42,865 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, 1, 1] [2022-03-15 16:36:42,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:43,079 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -243104664, now seen corresponding path program 11 times [2022-03-15 16:36:43,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:43,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034472465] [2022-03-15 16:36:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:43,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034472465] [2022-03-15 16:36:43,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034472465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:43,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416512002] [2022-03-15 16:36:43,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:43,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:43,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:43,137 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:43,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:36:43,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:36:43,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:36:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416512002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:43,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:43,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 16:36:43,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590110341] [2022-03-15 16:36:43,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:43,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:36:43,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:36:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:36:43,243 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:43,384 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2022-03-15 16:36:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:43,392 INFO L225 Difference]: With dead ends: 2033 [2022-03-15 16:36:43,393 INFO L226 Difference]: Without dead ends: 2018 [2022-03-15 16:36:43,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:43,393 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:43,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 42 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-03-15 16:36:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2022-03-15 16:36:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 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 16:36:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2022-03-15 16:36:43,429 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2022-03-15 16:36:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2022-03-15 16:36:43,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 16:36:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2022-03-15 16:36:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:43,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:43,433 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, 1, 1] [2022-03-15 16:36:43,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:43,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-15 16:36:43,650 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1639204200, now seen corresponding path program 12 times [2022-03-15 16:36:43,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:43,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708123364] [2022-03-15 16:36:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:43,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:43,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708123364] [2022-03-15 16:36:43,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708123364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:43,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21300423] [2022-03-15 16:36:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:43,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:43,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:36:43,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:36:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:43,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21300423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:43,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:43,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:43,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421947631] [2022-03-15 16:36:43,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:43,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:43,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:43,802 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:43,886 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2022-03-15 16:36:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:43,894 INFO L225 Difference]: With dead ends: 1938 [2022-03-15 16:36:43,894 INFO L226 Difference]: Without dead ends: 1922 [2022-03-15 16:36:43,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:43,895 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:43,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 48 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-03-15 16:36:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2022-03-15 16:36:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 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 16:36:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2022-03-15 16:36:43,924 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2022-03-15 16:36:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:43,924 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2022-03-15 16:36:43,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2022-03-15 16:36:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:43,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:43,928 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, 1, 1] [2022-03-15 16:36:43,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:44,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,144 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1856306738, now seen corresponding path program 13 times [2022-03-15 16:36:44,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:44,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134025027] [2022-03-15 16:36:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:44,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134025027] [2022-03-15 16:36:44,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134025027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:44,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796148334] [2022-03-15 16:36:44,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:44,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:44,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:36:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:44,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:44,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796148334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:44,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:44,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:44,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072872717] [2022-03-15 16:36:44,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:44,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:44,270 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:44,352 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2022-03-15 16:36:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:36:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:44,374 INFO L225 Difference]: With dead ends: 2961 [2022-03-15 16:36:44,375 INFO L226 Difference]: Without dead ends: 2952 [2022-03-15 16:36:44,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:36:44,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:44,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-03-15 16:36:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2022-03-15 16:36:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 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 16:36:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2022-03-15 16:36:44,452 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2022-03-15 16:36:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2022-03-15 16:36:44,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2022-03-15 16:36:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:44,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:44,457 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, 1, 1] [2022-03-15 16:36:44,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:44,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,663 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash -266436362, now seen corresponding path program 14 times [2022-03-15 16:36:44,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:44,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763987027] [2022-03-15 16:36:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:44,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763987027] [2022-03-15 16:36:44,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763987027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:44,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133945303] [2022-03-15 16:36:44,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:44,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:44,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:44,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:36:44,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:44,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133945303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:44,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:44,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:44,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519264081] [2022-03-15 16:36:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:44,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:44,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:44,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:44,815 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:44,910 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2022-03-15 16:36:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:44,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:44,918 INFO L225 Difference]: With dead ends: 3041 [2022-03-15 16:36:44,918 INFO L226 Difference]: Without dead ends: 3041 [2022-03-15 16:36:44,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:44,919 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:44,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 61 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-15 16:36:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2022-03-15 16:36:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 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 16:36:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2022-03-15 16:36:44,966 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2022-03-15 16:36:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:44,967 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2022-03-15 16:36:44,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 16:36:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2022-03-15 16:36:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:44,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:44,971 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, 1, 1] [2022-03-15 16:36:44,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:45,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:36:45,188 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash -993594422, now seen corresponding path program 15 times [2022-03-15 16:36:45,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:45,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588527090] [2022-03-15 16:36:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:45,210 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 16:36:45,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:45,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588527090] [2022-03-15 16:36:45,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588527090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:45,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303658465] [2022-03-15 16:36:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:45,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:45,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:45,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:36:45,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:36:45,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:45,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:45,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303658465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:45,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:45,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:36:45,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036028514] [2022-03-15 16:36:45,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:45,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:36:45,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:36:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:36:45,370 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:45,935 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2022-03-15 16:36:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:36:45,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:45,967 INFO L225 Difference]: With dead ends: 9230 [2022-03-15 16:36:45,967 INFO L226 Difference]: Without dead ends: 8962 [2022-03-15 16:36:45,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:36:45,968 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:45,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 157 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:36:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2022-03-15 16:36:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2022-03-15 16:36:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 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 16:36:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2022-03-15 16:36:46,103 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2022-03-15 16:36:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:46,104 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2022-03-15 16:36:46,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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 16:36:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2022-03-15 16:36:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:46,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:46,112 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, 1, 1] [2022-03-15 16:36:46,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-15 16:36:46,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:46,335 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2078630128, now seen corresponding path program 16 times [2022-03-15 16:36:46,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:46,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907969976] [2022-03-15 16:36:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:46,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:46,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907969976] [2022-03-15 16:36:46,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907969976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:46,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406734574] [2022-03-15 16:36:46,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:46,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:46,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:46,357 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:46,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:36:46,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:46,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:46,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:46,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406734574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:46,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:46,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:46,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497231216] [2022-03-15 16:36:46,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:46,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:46,467 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 16:36:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:46,578 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2022-03-15 16:36:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:36:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 24 [2022-03-15 16:36:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:46,593 INFO L225 Difference]: With dead ends: 5640 [2022-03-15 16:36:46,593 INFO L226 Difference]: Without dead ends: 5614 [2022-03-15 16:36:46,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:36:46,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:46,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2022-03-15 16:36:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2022-03-15 16:36:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 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 16:36:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2022-03-15 16:36:46,711 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2022-03-15 16:36:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:46,711 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2022-03-15 16:36:46,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 16:36:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2022-03-15 16:36:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:46,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:46,720 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, 1, 1] [2022-03-15 16:36:46,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:46,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:46,937 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash 319339466, now seen corresponding path program 17 times [2022-03-15 16:36:46,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:46,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304923769] [2022-03-15 16:36:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:46,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:46,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304923769] [2022-03-15 16:36:46,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304923769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:46,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717015997] [2022-03-15 16:36:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:46,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:46,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:46,965 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:46,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:36:46,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:36:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:47,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:47,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717015997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:47,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:47,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-15 16:36:47,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446730695] [2022-03-15 16:36:47,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:47,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 16:36:47,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 16:36:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:36:47,076 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 16:36:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:47,284 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2022-03-15 16:36:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:36:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 16:36:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:47,299 INFO L225 Difference]: With dead ends: 6419 [2022-03-15 16:36:47,300 INFO L226 Difference]: Without dead ends: 6345 [2022-03-15 16:36:47,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:36:47,300 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:47,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 47 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2022-03-15 16:36:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2022-03-15 16:36:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 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 16:36:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2022-03-15 16:36:47,443 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2022-03-15 16:36:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:47,443 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2022-03-15 16:36:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 16:36:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2022-03-15 16:36:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:47,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:47,452 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, 1, 1] [2022-03-15 16:36:47,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:47,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:47,668 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1402063808, now seen corresponding path program 18 times [2022-03-15 16:36:47,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:47,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347664364] [2022-03-15 16:36:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:47,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:47,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:47,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347664364] [2022-03-15 16:36:47,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347664364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:47,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60930055] [2022-03-15 16:36:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:47,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:47,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:47,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:47,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:36:47,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:47,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:36:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:47,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:47,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60930055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:47,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:47,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:47,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819879909] [2022-03-15 16:36:47,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:47,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:47,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:47,805 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:47,899 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2022-03-15 16:36:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:36:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:47,913 INFO L225 Difference]: With dead ends: 5931 [2022-03-15 16:36:47,913 INFO L226 Difference]: Without dead ends: 5906 [2022-03-15 16:36:47,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:36:47,914 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:47,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2022-03-15 16:36:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2022-03-15 16:36:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 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 16:36:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2022-03-15 16:36:48,007 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2022-03-15 16:36:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:48,007 INFO L470 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2022-03-15 16:36:48,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2022-03-15 16:36:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:48,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:48,017 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, 1, 1] [2022-03-15 16:36:48,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:48,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:36:48,223 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash -199751440, now seen corresponding path program 19 times [2022-03-15 16:36:48,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:48,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004917930] [2022-03-15 16:36:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:48,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:48,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:48,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004917930] [2022-03-15 16:36:48,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004917930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:48,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973235293] [2022-03-15 16:36:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:48,248 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:48,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:36:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:48,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:36:48,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973235293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:48,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:48,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:36:48,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591202387] [2022-03-15 16:36:48,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:36:48,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:36:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:36:48,356 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:48,532 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2022-03-15 16:36:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:36:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:48,547 INFO L225 Difference]: With dead ends: 6187 [2022-03-15 16:36:48,548 INFO L226 Difference]: Without dead ends: 6177 [2022-03-15 16:36:48,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:48,548 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:48,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 51 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-03-15 16:36:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2022-03-15 16:36:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 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 16:36:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2022-03-15 16:36:48,646 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2022-03-15 16:36:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2022-03-15 16:36:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 16:36:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2022-03-15 16:36:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:48,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:48,656 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, 1, 1] [2022-03-15 16:36:48,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:48,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:36:48,872 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1472685148, now seen corresponding path program 20 times [2022-03-15 16:36:48,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:48,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753616328] [2022-03-15 16:36:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:48,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:48,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753616328] [2022-03-15 16:36:48,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753616328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:48,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135968308] [2022-03-15 16:36:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:48,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:48,905 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:48,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:36:48,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:48,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:48,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:36:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:48,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:49,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135968308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:49,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:49,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-15 16:36:49,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522472317] [2022-03-15 16:36:49,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:49,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:49,027 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:49,461 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2022-03-15 16:36:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:36:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:49,478 INFO L225 Difference]: With dead ends: 7179 [2022-03-15 16:36:49,478 INFO L226 Difference]: Without dead ends: 7111 [2022-03-15 16:36:49,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:36:49,479 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:49,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 107 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:36:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2022-03-15 16:36:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2022-03-15 16:36:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 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 16:36:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2022-03-15 16:36:49,599 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2022-03-15 16:36:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2022-03-15 16:36:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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 16:36:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2022-03-15 16:36:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:49,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:49,609 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, 1, 1] [2022-03-15 16:36:49,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:49,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:49,820 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash 828713550, now seen corresponding path program 21 times [2022-03-15 16:36:49,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:49,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148445018] [2022-03-15 16:36:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:49,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:49,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148445018] [2022-03-15 16:36:49,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148445018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:49,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316047861] [2022-03-15 16:36:49,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:36:49,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:49,844 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:36:49,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:36:49,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:36:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:36:49,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316047861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:49,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:49,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-15 16:36:49,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924198469] [2022-03-15 16:36:49,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:49,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:49,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:49,953 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 16:36:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:50,438 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2022-03-15 16:36:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:36:50,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 16:36:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:50,467 INFO L225 Difference]: With dead ends: 11751 [2022-03-15 16:36:50,467 INFO L226 Difference]: Without dead ends: 11587 [2022-03-15 16:36:50,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:36:50,469 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:50,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 87 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:36:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2022-03-15 16:36:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2022-03-15 16:36:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 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 16:36:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2022-03-15 16:36:50,642 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2022-03-15 16:36:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2022-03-15 16:36:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 16:36:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2022-03-15 16:36:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:36:50,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:50,658 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, 1, 1] [2022-03-15 16:36:50,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:50,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:50,874 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1031366276, now seen corresponding path program 22 times [2022-03-15 16:36:50,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:50,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903824622] [2022-03-15 16:36:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:50,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:50,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903824622] [2022-03-15 16:36:50,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903824622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:50,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692765511] [2022-03-15 16:36:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:36:50,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:50,914 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:36:50,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:36:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:36:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:50,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:51,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692765511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:51,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:51,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:36:51,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780401970] [2022-03-15 16:36:51,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:36:51,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:36:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:36:51,022 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:51,205 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2022-03-15 16:36:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:36:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:51,238 INFO L225 Difference]: With dead ends: 9470 [2022-03-15 16:36:51,239 INFO L226 Difference]: Without dead ends: 9392 [2022-03-15 16:36:51,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:36:51,239 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:51,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 66 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:36:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2022-03-15 16:36:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2022-03-15 16:36:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 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 16:36:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2022-03-15 16:36:51,411 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2022-03-15 16:36:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2022-03-15 16:36:51,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 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 16:36:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2022-03-15 16:36:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:36:51,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:51,428 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, 1, 1] [2022-03-15 16:36:51,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:51,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:51,644 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash 213109642, now seen corresponding path program 23 times [2022-03-15 16:36:51,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:51,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774552220] [2022-03-15 16:36:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:51,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:51,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774552220] [2022-03-15 16:36:51,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774552220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183871930] [2022-03-15 16:36:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:36:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:51,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:51,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:51,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:36:51,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:36:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:36:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:52,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:36:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:52,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:36:52,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:36:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:52,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:52,591 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:52,591 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 30 treesize of output 55 [2022-03-15 16:36:52,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:52,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:36:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,750 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:36:52,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:36:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:52,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:36:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:52,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183871930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:52,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:52,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:36:52,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143142880] [2022-03-15 16:36:52,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:52,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:36:52,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:36:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:36:52,881 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:36:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:53,379 INFO L93 Difference]: Finished difference Result 11612 states and 42094 transitions. [2022-03-15 16:36:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:36:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:36:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:53,412 INFO L225 Difference]: With dead ends: 11612 [2022-03-15 16:36:53,412 INFO L226 Difference]: Without dead ends: 11609 [2022-03-15 16:36:53,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:36:53,412 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:53,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 254 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 475 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-03-15 16:36:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11609 states. [2022-03-15 16:36:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11609 to 8581. [2022-03-15 16:36:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.7157342657342656) internal successors, (31881), 8580 states have internal predecessors, (31881), 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 16:36:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 31881 transitions. [2022-03-15 16:36:53,603 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 31881 transitions. Word has length 28 [2022-03-15 16:36:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:53,603 INFO L470 AbstractCegarLoop]: Abstraction has 8581 states and 31881 transitions. [2022-03-15 16:36:53,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:36:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 31881 transitions. [2022-03-15 16:36:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:36:53,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:53,619 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, 1, 1] [2022-03-15 16:36:53,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:36:53,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 16:36:53,835 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:53,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1560240398, now seen corresponding path program 24 times [2022-03-15 16:36:53,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:53,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177277600] [2022-03-15 16:36:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:53,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:54,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:54,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177277600] [2022-03-15 16:36:54,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177277600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:54,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928830019] [2022-03-15 16:36:54,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:36:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:54,066 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:54,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:36:54,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:36:54,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:36:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:54,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:36:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:54,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:36:54,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:36:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:54,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:54,702 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:54,703 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 30 treesize of output 55 [2022-03-15 16:36:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:54,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:36:54,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,858 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:36:54,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:36:54,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:54,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:54,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:36:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:54,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928830019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:54,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:54,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:36:54,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701044872] [2022-03-15 16:36:54,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:36:54,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:36:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:36:54,984 INFO L87 Difference]: Start difference. First operand 8581 states and 31881 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:36:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:55,545 INFO L93 Difference]: Finished difference Result 11632 states and 42147 transitions. [2022-03-15 16:36:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:36:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:36:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:55,572 INFO L225 Difference]: With dead ends: 11632 [2022-03-15 16:36:55,572 INFO L226 Difference]: Without dead ends: 11629 [2022-03-15 16:36:55,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:36:55,573 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 275 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 512 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2022-03-15 16:36:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2022-03-15 16:36:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 8593. [2022-03-15 16:36:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8593 states, 8592 states have (on average 3.7138035381750467) internal successors, (31909), 8592 states have internal predecessors, (31909), 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 16:36:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 31909 transitions. [2022-03-15 16:36:55,756 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 31909 transitions. Word has length 28 [2022-03-15 16:36:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:55,756 INFO L470 AbstractCegarLoop]: Abstraction has 8593 states and 31909 transitions. [2022-03-15 16:36:55,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:36:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 31909 transitions. [2022-03-15 16:36:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:36:55,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:55,770 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, 1, 1] [2022-03-15 16:36:55,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:55,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 16:36:55,986 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1601865618, now seen corresponding path program 25 times [2022-03-15 16:36:55,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:55,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606294226] [2022-03-15 16:36:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:56,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:56,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606294226] [2022-03-15 16:36:56,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606294226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:56,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384137881] [2022-03-15 16:36:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:36:56,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:56,201 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:56,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:36:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:56,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:36:56,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:56,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:36:56,654 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 24 treesize of output 20 [2022-03-15 16:36:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:36:56,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:36:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:56,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:56,803 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:56,804 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 30 treesize of output 55 [2022-03-15 16:36:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:56,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:36:56,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:56,955 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:36:56,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:36:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:57,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:36:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:57,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384137881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:57,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:57,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:36:57,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261279907] [2022-03-15 16:36:57,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:57,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:36:57,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:36:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:36:57,081 INFO L87 Difference]: Start difference. First operand 8593 states and 31909 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:36:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:57,716 INFO L93 Difference]: Finished difference Result 11665 states and 42260 transitions. [2022-03-15 16:36:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:36:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:36:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:57,744 INFO L225 Difference]: With dead ends: 11665 [2022-03-15 16:36:57,745 INFO L226 Difference]: Without dead ends: 11650 [2022-03-15 16:36:57,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:36:57,745 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:57,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 303 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 715 Invalid, 0 Unknown, 465 Unchecked, 0.3s Time] [2022-03-15 16:36:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11650 states. [2022-03-15 16:36:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11650 to 8655. [2022-03-15 16:36:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8655 states, 8654 states have (on average 3.7110006933210076) internal successors, (32115), 8654 states have internal predecessors, (32115), 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 16:36:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 32115 transitions. [2022-03-15 16:36:57,918 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 32115 transitions. Word has length 28 [2022-03-15 16:36:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:57,918 INFO L470 AbstractCegarLoop]: Abstraction has 8655 states and 32115 transitions. [2022-03-15 16:36:57,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:36:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 32115 transitions. [2022-03-15 16:36:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:36:57,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:57,964 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, 1, 1] [2022-03-15 16:36:57,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:58,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 16:36:58,175 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 837768650, now seen corresponding path program 26 times [2022-03-15 16:36:58,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:58,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327076947] [2022-03-15 16:36:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:58,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:58,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327076947] [2022-03-15 16:36:58,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327076947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:58,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760334917] [2022-03-15 16:36:58,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:58,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:58,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:58,410 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:58,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:36:58,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:36:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:36:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:36:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:58,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:36:58,924 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 24 treesize of output 20 [2022-03-15 16:36:58,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-15 16:36:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:58,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:58,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:36:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:58,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:59,093 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:36:59,094 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 30 treesize of output 55 [2022-03-15 16:36:59,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:59,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:36:59,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:59,260 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:36:59,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:36:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:36:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:36:59,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:36:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:59,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760334917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:59,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:59,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:36:59,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720382803] [2022-03-15 16:36:59,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:59,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:36:59,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:36:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:36:59,387 INFO L87 Difference]: Start difference. First operand 8655 states and 32115 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:36:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:59,871 INFO L93 Difference]: Finished difference Result 11796 states and 42646 transitions. [2022-03-15 16:36:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:36:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:36:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:59,895 INFO L225 Difference]: With dead ends: 11796 [2022-03-15 16:36:59,895 INFO L226 Difference]: Without dead ends: 11740 [2022-03-15 16:36:59,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:36:59,896 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:59,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 249 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-03-15 16:36:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11740 states. [2022-03-15 16:37:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11740 to 8708. [2022-03-15 16:37:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8708 states, 8707 states have (on average 3.7060985414034686) internal successors, (32269), 8707 states have internal predecessors, (32269), 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 16:37:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8708 states to 8708 states and 32269 transitions. [2022-03-15 16:37:00,067 INFO L78 Accepts]: Start accepts. Automaton has 8708 states and 32269 transitions. Word has length 28 [2022-03-15 16:37:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:00,067 INFO L470 AbstractCegarLoop]: Abstraction has 8708 states and 32269 transitions. [2022-03-15 16:37:00,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8708 states and 32269 transitions. [2022-03-15 16:37:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:00,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:00,084 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, 1, 1] [2022-03-15 16:37:00,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:00,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:00,299 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1190629366, now seen corresponding path program 27 times [2022-03-15 16:37:00,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295272547] [2022-03-15 16:37:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:00,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295272547] [2022-03-15 16:37:00,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295272547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:00,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942588687] [2022-03-15 16:37:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:00,559 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:00,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:37:00,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:37:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:00,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:01,017 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 24 treesize of output 20 [2022-03-15 16:37:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:01,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:01,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2022-03-15 16:37:01,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:01,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 72 [2022-03-15 16:37:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:01,909 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:37:01,909 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 54 treesize of output 79 [2022-03-15 16:37:02,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:02,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:02,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:02,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-03-15 16:37:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942588687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:02,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:02,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:37:02,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080955878] [2022-03-15 16:37:02,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:02,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:37:02,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:37:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:37:02,706 INFO L87 Difference]: Start difference. First operand 8708 states and 32269 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:04,221 INFO L93 Difference]: Finished difference Result 18757 states and 66076 transitions. [2022-03-15 16:37:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:37:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:04,299 INFO L225 Difference]: With dead ends: 18757 [2022-03-15 16:37:04,299 INFO L226 Difference]: Without dead ends: 18743 [2022-03-15 16:37:04,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:37:04,300 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:04,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 431 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 596 Invalid, 0 Unknown, 707 Unchecked, 0.3s Time] [2022-03-15 16:37:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18743 states. [2022-03-15 16:37:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18743 to 8752. [2022-03-15 16:37:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 3.701405553651011) internal successors, (32391), 8751 states have internal predecessors, (32391), 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 16:37:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 32391 transitions. [2022-03-15 16:37:04,543 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 32391 transitions. Word has length 28 [2022-03-15 16:37:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:04,544 INFO L470 AbstractCegarLoop]: Abstraction has 8752 states and 32391 transitions. [2022-03-15 16:37:04,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 32391 transitions. [2022-03-15 16:37:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:04,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:04,560 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, 1, 1] [2022-03-15 16:37:04,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:04,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:37:04,776 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 631830218, now seen corresponding path program 28 times [2022-03-15 16:37:04,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:04,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50420489] [2022-03-15 16:37:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:04,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:04,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50420489] [2022-03-15 16:37:04,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50420489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:04,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979934070] [2022-03-15 16:37:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:04,954 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:04,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:37:04,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:05,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:37:05,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:37:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:05,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:05,573 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 30 treesize of output 55 [2022-03-15 16:37:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:37:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,741 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:05,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:05,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:37:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979934070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:05,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:05,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:37:05,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690731890] [2022-03-15 16:37:05,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:05,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:05,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:05,855 INFO L87 Difference]: Start difference. First operand 8752 states and 32391 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:06,235 INFO L93 Difference]: Finished difference Result 11726 states and 42445 transitions. [2022-03-15 16:37:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:37:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:06,263 INFO L225 Difference]: With dead ends: 11726 [2022-03-15 16:37:06,263 INFO L226 Difference]: Without dead ends: 11711 [2022-03-15 16:37:06,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:37:06,264 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:06,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 194 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 352 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-03-15 16:37:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11711 states. [2022-03-15 16:37:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11711 to 8792. [2022-03-15 16:37:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8792 states, 8791 states have (on average 3.7001478785121145) internal successors, (32528), 8791 states have internal predecessors, (32528), 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 16:37:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8792 states to 8792 states and 32528 transitions. [2022-03-15 16:37:06,436 INFO L78 Accepts]: Start accepts. Automaton has 8792 states and 32528 transitions. Word has length 28 [2022-03-15 16:37:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:06,437 INFO L470 AbstractCegarLoop]: Abstraction has 8792 states and 32528 transitions. [2022-03-15 16:37:06,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8792 states and 32528 transitions. [2022-03-15 16:37:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:06,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:06,452 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, 1, 1] [2022-03-15 16:37:06,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:06,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:37:06,654 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2104926016, now seen corresponding path program 29 times [2022-03-15 16:37:06,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:06,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60200189] [2022-03-15 16:37:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:06,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:06,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60200189] [2022-03-15 16:37:06,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60200189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:06,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722675013] [2022-03-15 16:37:06,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:06,860 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:06,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:37:06,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:06,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:07,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:07,373 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 24 treesize of output 20 [2022-03-15 16:37:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:07,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:37:07,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:07,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:07,524 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 30 treesize of output 55 [2022-03-15 16:37:07,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:07,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:37:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,696 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:07,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:07,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:37:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722675013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:07,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:07,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:37:07,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597454931] [2022-03-15 16:37:07,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:07,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:07,830 INFO L87 Difference]: Start difference. First operand 8792 states and 32528 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:08,224 INFO L93 Difference]: Finished difference Result 11857 states and 42825 transitions. [2022-03-15 16:37:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:37:08,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:08,252 INFO L225 Difference]: With dead ends: 11857 [2022-03-15 16:37:08,253 INFO L226 Difference]: Without dead ends: 11842 [2022-03-15 16:37:08,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:37:08,253 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:08,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 214 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 512 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-03-15 16:37:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11842 states. [2022-03-15 16:37:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11842 to 8817. [2022-03-15 16:37:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 8816 states have (on average 3.698162431941924) internal successors, (32603), 8816 states have internal predecessors, (32603), 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 16:37:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 32603 transitions. [2022-03-15 16:37:08,429 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 32603 transitions. Word has length 28 [2022-03-15 16:37:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:08,429 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 32603 transitions. [2022-03-15 16:37:08,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 32603 transitions. [2022-03-15 16:37:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:08,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:08,460 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, 1, 1] [2022-03-15 16:37:08,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:08,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:37:08,676 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1396567798, now seen corresponding path program 30 times [2022-03-15 16:37:08,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:08,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115946309] [2022-03-15 16:37:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:08,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:08,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115946309] [2022-03-15 16:37:08,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115946309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:08,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461344118] [2022-03-15 16:37:08,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:08,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:08,898 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:37:08,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:37:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:37:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:09,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:09,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:09,503 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:09,503 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 30 treesize of output 55 [2022-03-15 16:37:09,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,688 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:09,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:09,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461344118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:09,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:09,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:09,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833729680] [2022-03-15 16:37:09,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:09,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:09,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:09,817 INFO L87 Difference]: Start difference. First operand 8817 states and 32603 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:10,429 INFO L93 Difference]: Finished difference Result 11883 states and 42937 transitions. [2022-03-15 16:37:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:37:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:10,458 INFO L225 Difference]: With dead ends: 11883 [2022-03-15 16:37:10,458 INFO L226 Difference]: Without dead ends: 11844 [2022-03-15 16:37:10,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:10,458 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 107 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:10,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 254 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 672 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-03-15 16:37:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-03-15 16:37:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 8822. [2022-03-15 16:37:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.698900351434078) internal successors, (32628), 8821 states have internal predecessors, (32628), 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 16:37:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 32628 transitions. [2022-03-15 16:37:10,628 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 32628 transitions. Word has length 28 [2022-03-15 16:37:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:10,628 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 32628 transitions. [2022-03-15 16:37:10,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 32628 transitions. [2022-03-15 16:37:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:10,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:10,643 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, 1, 1] [2022-03-15 16:37:10,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:10,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:37:10,860 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 459271548, now seen corresponding path program 31 times [2022-03-15 16:37:10,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:10,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024079404] [2022-03-15 16:37:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:11,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024079404] [2022-03-15 16:37:11,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024079404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:11,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725631238] [2022-03-15 16:37:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:11,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:11,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:37:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:11,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:11,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:11,742 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:11,742 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 30 treesize of output 55 [2022-03-15 16:37:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:11,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:37:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,923 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:11,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:11,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:11,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:11,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:37:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:12,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725631238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:12,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:12,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:37:12,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969550873] [2022-03-15 16:37:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:12,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:12,048 INFO L87 Difference]: Start difference. First operand 8822 states and 32628 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:12,452 INFO L93 Difference]: Finished difference Result 11894 states and 42962 transitions. [2022-03-15 16:37:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:37:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:12,482 INFO L225 Difference]: With dead ends: 11894 [2022-03-15 16:37:12,482 INFO L226 Difference]: Without dead ends: 11879 [2022-03-15 16:37:12,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:37:12,483 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:12,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 243 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 538 Invalid, 0 Unknown, 441 Unchecked, 0.2s Time] [2022-03-15 16:37:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2022-03-15 16:37:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 8855. [2022-03-15 16:37:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8855 states, 8854 states have (on average 3.6974248927038627) internal successors, (32737), 8854 states have internal predecessors, (32737), 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 16:37:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8855 states to 8855 states and 32737 transitions. [2022-03-15 16:37:12,727 INFO L78 Accepts]: Start accepts. Automaton has 8855 states and 32737 transitions. Word has length 28 [2022-03-15 16:37:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:12,727 INFO L470 AbstractCegarLoop]: Abstraction has 8855 states and 32737 transitions. [2022-03-15 16:37:12,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:37:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8855 states and 32737 transitions. [2022-03-15 16:37:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:12,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:12,743 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, 1, 1] [2022-03-15 16:37:12,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:37:12,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 16:37:12,959 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1167629766, now seen corresponding path program 32 times [2022-03-15 16:37:12,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:12,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499341502] [2022-03-15 16:37:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:13,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499341502] [2022-03-15 16:37:13,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499341502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:13,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487814734] [2022-03-15 16:37:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:13,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:13,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:13,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:13,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:37:13,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:13,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:13,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:13,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:13,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:13,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:13,729 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:13,730 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 30 treesize of output 55 [2022-03-15 16:37:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:13,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:13,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,892 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:13,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:13,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487814734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:13,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:13,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:13,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569572035] [2022-03-15 16:37:13,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:13,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:13,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:13,990 INFO L87 Difference]: Start difference. First operand 8855 states and 32737 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:14,831 INFO L93 Difference]: Finished difference Result 12220 states and 43941 transitions. [2022-03-15 16:37:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:37:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:14,860 INFO L225 Difference]: With dead ends: 12220 [2022-03-15 16:37:14,860 INFO L226 Difference]: Without dead ends: 12163 [2022-03-15 16:37:14,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:37:14,861 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:14,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 271 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 332 Unchecked, 0.5s Time] [2022-03-15 16:37:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2022-03-15 16:37:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 8839. [2022-03-15 16:37:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.6989137813985065) internal successors, (32691), 8838 states have internal predecessors, (32691), 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 16:37:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32691 transitions. [2022-03-15 16:37:15,065 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32691 transitions. Word has length 28 [2022-03-15 16:37:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 8839 states and 32691 transitions. [2022-03-15 16:37:15,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32691 transitions. [2022-03-15 16:37:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:15,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:15,081 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, 1, 1] [2022-03-15 16:37:15,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:37:15,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:15,296 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -730861046, now seen corresponding path program 33 times [2022-03-15 16:37:15,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:15,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614382053] [2022-03-15 16:37:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:15,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:15,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614382053] [2022-03-15 16:37:15,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614382053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:15,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949708382] [2022-03-15 16:37:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:15,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:15,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:37:15,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:37:15,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:37:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:15,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:15,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:15,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2022-03-15 16:37:15,885 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 81 treesize of output 69 [2022-03-15 16:37:16,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:16,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:16,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2022-03-15 16:37:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:17,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:17,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:17,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2022-03-15 16:37:17,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:17,760 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 41 treesize of output 74 [2022-03-15 16:37:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:17,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949708382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:17,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:17,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 16:37:17,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351517525] [2022-03-15 16:37:17,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:37:17,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:37:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:17,956 INFO L87 Difference]: Start difference. First operand 8839 states and 32691 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:37:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:20,081 INFO L93 Difference]: Finished difference Result 16943 states and 59870 transitions. [2022-03-15 16:37:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:37:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:37:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:20,126 INFO L225 Difference]: With dead ends: 16943 [2022-03-15 16:37:20,126 INFO L226 Difference]: Without dead ends: 16929 [2022-03-15 16:37:20,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=985, Invalid=5021, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:37:20,128 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2571 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:20,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 538 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 540 Invalid, 0 Unknown, 2571 Unchecked, 0.2s Time] [2022-03-15 16:37:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16929 states. [2022-03-15 16:37:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16929 to 8966. [2022-03-15 16:37:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 3.6847741215839376) internal successors, (33034), 8965 states have internal predecessors, (33034), 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 16:37:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 33034 transitions. [2022-03-15 16:37:20,398 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 33034 transitions. Word has length 28 [2022-03-15 16:37:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:20,399 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 33034 transitions. [2022-03-15 16:37:20,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:37:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 33034 transitions. [2022-03-15 16:37:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:20,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:20,414 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, 1, 1] [2022-03-15 16:37:20,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 16:37:20,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:37:20,619 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -633137262, now seen corresponding path program 34 times [2022-03-15 16:37:20,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:20,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816883113] [2022-03-15 16:37:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:20,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816883113] [2022-03-15 16:37:20,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816883113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150154263] [2022-03-15 16:37:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:20,862 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:20,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:37:20,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:21,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:21,239 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 24 treesize of output 20 [2022-03-15 16:37:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:37:21,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:21,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:21,356 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:21,356 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 30 treesize of output 55 [2022-03-15 16:37:21,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:21,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:21,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,476 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:21,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:21,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:21,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:21,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150154263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:21,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:21,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:21,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617836966] [2022-03-15 16:37:21,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:21,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:21,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:21,568 INFO L87 Difference]: Start difference. First operand 8966 states and 33034 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:22,179 INFO L93 Difference]: Finished difference Result 13399 states and 47952 transitions. [2022-03-15 16:37:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:22,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:22,214 INFO L225 Difference]: With dead ends: 13399 [2022-03-15 16:37:22,215 INFO L226 Difference]: Without dead ends: 13384 [2022-03-15 16:37:22,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:37:22,215 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:22,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 291 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 572 Invalid, 0 Unknown, 492 Unchecked, 0.3s Time] [2022-03-15 16:37:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2022-03-15 16:37:22,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 9007. [2022-03-15 16:37:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9007 states, 9006 states have (on average 3.681545636242505) internal successors, (33156), 9006 states have internal predecessors, (33156), 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 16:37:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9007 states to 9007 states and 33156 transitions. [2022-03-15 16:37:22,469 INFO L78 Accepts]: Start accepts. Automaton has 9007 states and 33156 transitions. Word has length 28 [2022-03-15 16:37:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:22,469 INFO L470 AbstractCegarLoop]: Abstraction has 9007 states and 33156 transitions. [2022-03-15 16:37:22,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 9007 states and 33156 transitions. [2022-03-15 16:37:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:22,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:22,487 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, 1, 1] [2022-03-15 16:37:22,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:37:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:22,691 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2015332598, now seen corresponding path program 35 times [2022-03-15 16:37:22,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:22,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640361190] [2022-03-15 16:37:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:22,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:22,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640361190] [2022-03-15 16:37:22,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640361190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:22,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577053834] [2022-03-15 16:37:22,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:22,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:22,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:22,904 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:37:22,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:23,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:23,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:23,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:37:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:23,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:23,539 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:23,539 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 30 treesize of output 55 [2022-03-15 16:37:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:23,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,695 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:23,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:23,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:23,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:23,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577053834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:23,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:23,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:23,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833284037] [2022-03-15 16:37:23,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:23,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:23,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:23,818 INFO L87 Difference]: Start difference. First operand 9007 states and 33156 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:24,476 INFO L93 Difference]: Finished difference Result 13221 states and 47328 transitions. [2022-03-15 16:37:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:37:24,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:24,512 INFO L225 Difference]: With dead ends: 13221 [2022-03-15 16:37:24,513 INFO L226 Difference]: Without dead ends: 13187 [2022-03-15 16:37:24,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:24,513 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 657 Invalid, 0 Unknown, 435 Unchecked, 0.3s Time] [2022-03-15 16:37:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13187 states. [2022-03-15 16:37:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13187 to 8999. [2022-03-15 16:37:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 3.6830406757057124) internal successors, (33140), 8998 states have internal predecessors, (33140), 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 16:37:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 33140 transitions. [2022-03-15 16:37:24,707 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 33140 transitions. Word has length 28 [2022-03-15 16:37:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:24,707 INFO L470 AbstractCegarLoop]: Abstraction has 8999 states and 33140 transitions. [2022-03-15 16:37:24,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 33140 transitions. [2022-03-15 16:37:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:24,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:24,722 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, 1, 1] [2022-03-15 16:37:24,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:37:24,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 16:37:24,935 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1227555526, now seen corresponding path program 36 times [2022-03-15 16:37:24,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:24,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611411101] [2022-03-15 16:37:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:25,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611411101] [2022-03-15 16:37:25,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611411101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:25,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103099711] [2022-03-15 16:37:25,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:25,226 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:25,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:37:25,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:37:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:37:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:25,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:25,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:37:25,677 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 14 [2022-03-15 16:37:25,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-15 16:37:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:25,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:25,873 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:25,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 55 [2022-03-15 16:37:25,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:25,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:25,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:26,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:26,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:26,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:26,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-03-15 16:37:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103099711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:26,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:26,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:37:26,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806328410] [2022-03-15 16:37:26,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:37:26,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:37:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:37:26,169 INFO L87 Difference]: Start difference. First operand 8999 states and 33140 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:37:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:29,128 INFO L93 Difference]: Finished difference Result 13903 states and 48779 transitions. [2022-03-15 16:37:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:37:29,128 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:37:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:29,164 INFO L225 Difference]: With dead ends: 13903 [2022-03-15 16:37:29,164 INFO L226 Difference]: Without dead ends: 13889 [2022-03-15 16:37:29,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=765, Invalid=6375, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:37:29,166 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 255 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:29,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 514 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1161 Invalid, 0 Unknown, 867 Unchecked, 0.6s Time] [2022-03-15 16:37:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-03-15 16:37:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 9127. [2022-03-15 16:37:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 3.6725838264299804) internal successors, (33516), 9126 states have internal predecessors, (33516), 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 16:37:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 33516 transitions. [2022-03-15 16:37:29,443 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 33516 transitions. Word has length 28 [2022-03-15 16:37:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:29,443 INFO L470 AbstractCegarLoop]: Abstraction has 9127 states and 33516 transitions. [2022-03-15 16:37:29,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:37:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 33516 transitions. [2022-03-15 16:37:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:29,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:29,459 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, 1, 1] [2022-03-15 16:37:29,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:37:29,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:37:29,660 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 823881094, now seen corresponding path program 37 times [2022-03-15 16:37:29,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:29,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670465871] [2022-03-15 16:37:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:29,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:29,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670465871] [2022-03-15 16:37:29,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670465871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:29,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646396649] [2022-03-15 16:37:29,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:29,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:29,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:29,872 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:29,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:37:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:29,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:29,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:30,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:30,341 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 24 treesize of output 20 [2022-03-15 16:37:30,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:30,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:37:30,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:37:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:30,491 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:30,492 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 30 treesize of output 55 [2022-03-15 16:37:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:30,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:37:30,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,641 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:30,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:30,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:37:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646396649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:30,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:30,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:37:30,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884921746] [2022-03-15 16:37:30,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:30,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:30,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:30,721 INFO L87 Difference]: Start difference. First operand 9127 states and 33516 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:31,338 INFO L93 Difference]: Finished difference Result 13322 states and 47695 transitions. [2022-03-15 16:37:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:31,371 INFO L225 Difference]: With dead ends: 13322 [2022-03-15 16:37:31,371 INFO L226 Difference]: Without dead ends: 13319 [2022-03-15 16:37:31,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:31,372 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:31,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 328 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 675 Invalid, 0 Unknown, 590 Unchecked, 0.3s Time] [2022-03-15 16:37:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13319 states. [2022-03-15 16:37:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13319 to 9129. [2022-03-15 16:37:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 9128 states have (on average 3.673751095530237) internal successors, (33534), 9128 states have internal predecessors, (33534), 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 16:37:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 33534 transitions. [2022-03-15 16:37:31,570 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 33534 transitions. Word has length 28 [2022-03-15 16:37:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 33534 transitions. [2022-03-15 16:37:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:37:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 33534 transitions. [2022-03-15 16:37:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:31,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:31,586 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, 1, 1] [2022-03-15 16:37:31,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:37:31,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:37:31,799 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 865506314, now seen corresponding path program 38 times [2022-03-15 16:37:31,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:31,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476545432] [2022-03-15 16:37:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:31,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:32,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476545432] [2022-03-15 16:37:32,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476545432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:32,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135566854] [2022-03-15 16:37:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:32,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:32,039 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:32,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:37:32,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:32,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:32,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:32,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:32,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:32,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:32,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:37:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:32,670 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:32,671 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 30 treesize of output 55 [2022-03-15 16:37:32,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:32,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:37:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,827 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:32,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:32,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:32,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:37:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135566854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:32,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:32,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:37:32,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822629414] [2022-03-15 16:37:32,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:32,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:32,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:32,945 INFO L87 Difference]: Start difference. First operand 9129 states and 33534 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:37:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:33,616 INFO L93 Difference]: Finished difference Result 13328 states and 47713 transitions. [2022-03-15 16:37:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:37:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:33,647 INFO L225 Difference]: With dead ends: 13328 [2022-03-15 16:37:33,647 INFO L226 Difference]: Without dead ends: 13313 [2022-03-15 16:37:33,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:33,648 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:33,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 351 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 609 Invalid, 0 Unknown, 463 Unchecked, 0.3s Time] [2022-03-15 16:37:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13313 states. [2022-03-15 16:37:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13313 to 9111. [2022-03-15 16:37:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 3.675740944017563) internal successors, (33486), 9110 states have internal predecessors, (33486), 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 16:37:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 33486 transitions. [2022-03-15 16:37:33,839 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 33486 transitions. Word has length 28 [2022-03-15 16:37:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:33,839 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 33486 transitions. [2022-03-15 16:37:33,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:37:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 33486 transitions. [2022-03-15 16:37:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:33,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:33,853 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, 1, 1] [2022-03-15 16:37:33,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:37:34,059 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash 20287918, now seen corresponding path program 39 times [2022-03-15 16:37:34,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:34,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720130321] [2022-03-15 16:37:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:34,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:34,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720130321] [2022-03-15 16:37:34,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720130321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:34,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774491921] [2022-03-15 16:37:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:34,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:34,260 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:37:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:37:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:34,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:34,751 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 31 treesize of output 27 [2022-03-15 16:37:34,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:34,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:34,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2022-03-15 16:37:34,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:34,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 72 [2022-03-15 16:37:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:35,557 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:37:35,557 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 54 treesize of output 79 [2022-03-15 16:37:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:36,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:36,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-03-15 16:37:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:36,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774491921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:36,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:36,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:37:36,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709275933] [2022-03-15 16:37:36,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:37:36,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:37:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:37:36,274 INFO L87 Difference]: Start difference. First operand 9111 states and 33486 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:38,033 INFO L93 Difference]: Finished difference Result 13805 states and 49324 transitions. [2022-03-15 16:37:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:37:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:38,067 INFO L225 Difference]: With dead ends: 13805 [2022-03-15 16:37:38,067 INFO L226 Difference]: Without dead ends: 13791 [2022-03-15 16:37:38,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=613, Invalid=3547, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:37:38,068 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:38,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 376 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 594 Invalid, 0 Unknown, 757 Unchecked, 0.3s Time] [2022-03-15 16:37:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13791 states. [2022-03-15 16:37:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13791 to 9174. [2022-03-15 16:37:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9174 states, 9173 states have (on average 3.67011882699226) internal successors, (33666), 9173 states have internal predecessors, (33666), 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 16:37:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 33666 transitions. [2022-03-15 16:37:38,264 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 33666 transitions. Word has length 28 [2022-03-15 16:37:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:38,264 INFO L470 AbstractCegarLoop]: Abstraction has 9174 states and 33666 transitions. [2022-03-15 16:37:38,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 16:37:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 33666 transitions. [2022-03-15 16:37:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:38,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:38,280 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, 1, 1] [2022-03-15 16:37:38,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:37:38,497 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2141582734, now seen corresponding path program 40 times [2022-03-15 16:37:38,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:38,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785456105] [2022-03-15 16:37:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:38,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785456105] [2022-03-15 16:37:38,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785456105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:38,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162645509] [2022-03-15 16:37:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:38,719 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:38,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:37:38,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:38,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:38,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:38,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:39,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:39,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:37:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:39,290 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:39,290 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 30 treesize of output 55 [2022-03-15 16:37:39,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:39,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,492 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:39,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:39,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162645509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:39,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:39,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:39,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936807845] [2022-03-15 16:37:39,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:39,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:39,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:39,600 INFO L87 Difference]: Start difference. First operand 9174 states and 33666 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:40,251 INFO L93 Difference]: Finished difference Result 12418 states and 44477 transitions. [2022-03-15 16:37:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:37:40,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:40,287 INFO L225 Difference]: With dead ends: 12418 [2022-03-15 16:37:40,288 INFO L226 Difference]: Without dead ends: 12403 [2022-03-15 16:37:40,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:40,288 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:40,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 238 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 815 Invalid, 0 Unknown, 250 Unchecked, 0.4s Time] [2022-03-15 16:37:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12403 states. [2022-03-15 16:37:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12403 to 9094. [2022-03-15 16:37:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9094 states, 9093 states have (on average 3.6804135048938744) internal successors, (33466), 9093 states have internal predecessors, (33466), 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 16:37:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9094 states to 9094 states and 33466 transitions. [2022-03-15 16:37:40,463 INFO L78 Accepts]: Start accepts. Automaton has 9094 states and 33466 transitions. Word has length 28 [2022-03-15 16:37:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:40,463 INFO L470 AbstractCegarLoop]: Abstraction has 9094 states and 33466 transitions. [2022-03-15 16:37:40,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 9094 states and 33466 transitions. [2022-03-15 16:37:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:40,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:40,478 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, 1, 1] [2022-03-15 16:37:40,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:37:40,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:37:40,694 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -887489994, now seen corresponding path program 41 times [2022-03-15 16:37:40,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:40,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866731598] [2022-03-15 16:37:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:40,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:40,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866731598] [2022-03-15 16:37:40,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866731598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:40,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630368786] [2022-03-15 16:37:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:40,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:40,913 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:40,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:37:40,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:37:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:40,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:41,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:41,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:37:41,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:37:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:41,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:41,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:41,498 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 30 treesize of output 55 [2022-03-15 16:37:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:41,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:41,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,673 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:41,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:41,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:41,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:41,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630368786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:41,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:41,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:41,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701621421] [2022-03-15 16:37:41,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:41,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:41,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:41,803 INFO L87 Difference]: Start difference. First operand 9094 states and 33466 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:42,433 INFO L93 Difference]: Finished difference Result 13252 states and 47549 transitions. [2022-03-15 16:37:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:37:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:42,471 INFO L225 Difference]: With dead ends: 13252 [2022-03-15 16:37:42,471 INFO L226 Difference]: Without dead ends: 13245 [2022-03-15 16:37:42,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:37:42,471 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 125 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:42,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 261 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 650 Invalid, 0 Unknown, 403 Unchecked, 0.3s Time] [2022-03-15 16:37:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2022-03-15 16:37:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 9097. [2022-03-15 16:37:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9097 states, 9096 states have (on average 3.680079155672823) internal successors, (33474), 9096 states have internal predecessors, (33474), 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 16:37:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9097 states to 9097 states and 33474 transitions. [2022-03-15 16:37:42,709 INFO L78 Accepts]: Start accepts. Automaton has 9097 states and 33474 transitions. Word has length 28 [2022-03-15 16:37:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:42,709 INFO L470 AbstractCegarLoop]: Abstraction has 9097 states and 33474 transitions. [2022-03-15 16:37:42,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9097 states and 33474 transitions. [2022-03-15 16:37:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:42,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:42,725 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, 1, 1] [2022-03-15 16:37:42,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:42,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-15 16:37:42,941 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1524168138, now seen corresponding path program 42 times [2022-03-15 16:37:42,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:42,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620534501] [2022-03-15 16:37:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:43,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620534501] [2022-03-15 16:37:43,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620534501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:43,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701634981] [2022-03-15 16:37:43,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:43,140 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:37:43,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:37:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:43,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:43,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:37:43,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:43,547 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:43,547 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 30 treesize of output 55 [2022-03-15 16:37:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:43,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,654 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:43,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:43,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701634981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:43,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:43,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:43,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383344525] [2022-03-15 16:37:43,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:43,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:43,742 INFO L87 Difference]: Start difference. First operand 9097 states and 33474 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:44,145 INFO L93 Difference]: Finished difference Result 12469 states and 44728 transitions. [2022-03-15 16:37:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:37:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:44,176 INFO L225 Difference]: With dead ends: 12469 [2022-03-15 16:37:44,176 INFO L226 Difference]: Without dead ends: 12454 [2022-03-15 16:37:44,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:44,176 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:44,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 213 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 419 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-03-15 16:37:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12454 states. [2022-03-15 16:37:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12454 to 9172. [2022-03-15 16:37:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9172 states, 9171 states have (on average 3.6757169338131064) internal successors, (33710), 9171 states have internal predecessors, (33710), 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 16:37:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9172 states to 9172 states and 33710 transitions. [2022-03-15 16:37:44,353 INFO L78 Accepts]: Start accepts. Automaton has 9172 states and 33710 transitions. Word has length 28 [2022-03-15 16:37:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 9172 states and 33710 transitions. [2022-03-15 16:37:44,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9172 states and 33710 transitions. [2022-03-15 16:37:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:44,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:44,368 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, 1, 1] [2022-03-15 16:37:44,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:44,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:44,584 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1273862414, now seen corresponding path program 43 times [2022-03-15 16:37:44,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:44,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114960080] [2022-03-15 16:37:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:44,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:44,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114960080] [2022-03-15 16:37:44,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114960080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:44,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323777512] [2022-03-15 16:37:44,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:44,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:44,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:44,794 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:44,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:37:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:44,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:45,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:45,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:45,292 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:45,293 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 30 treesize of output 55 [2022-03-15 16:37:45,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:45,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:45,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,429 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:45,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:45,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:45,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:45,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323777512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:45,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:45,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:45,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282049880] [2022-03-15 16:37:45,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:45,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:45,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:45,531 INFO L87 Difference]: Start difference. First operand 9172 states and 33710 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:45,967 INFO L93 Difference]: Finished difference Result 12408 states and 44563 transitions. [2022-03-15 16:37:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:37:45,967 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:45,997 INFO L225 Difference]: With dead ends: 12408 [2022-03-15 16:37:45,998 INFO L226 Difference]: Without dead ends: 12393 [2022-03-15 16:37:45,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:37:45,998 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:45,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 204 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 656 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-03-15 16:37:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2022-03-15 16:37:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 9193. [2022-03-15 16:37:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.675587467362924) internal successors, (33786), 9192 states have internal predecessors, (33786), 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 16:37:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33786 transitions. [2022-03-15 16:37:46,180 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33786 transitions. Word has length 28 [2022-03-15 16:37:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33786 transitions. [2022-03-15 16:37:46,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33786 transitions. [2022-03-15 16:37:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:46,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:46,196 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, 1, 1] [2022-03-15 16:37:46,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:37:46,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:37:46,412 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1478357238, now seen corresponding path program 44 times [2022-03-15 16:37:46,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:46,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192337438] [2022-03-15 16:37:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:46,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:46,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192337438] [2022-03-15 16:37:46,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192337438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:46,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584368035] [2022-03-15 16:37:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:46,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:46,614 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:46,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:37:46,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:46,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:46,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:46,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:47,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:47,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:37:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:47,208 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:47,208 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 30 treesize of output 55 [2022-03-15 16:37:47,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:47,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,362 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:47,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:47,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:47,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584368035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:47,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:47,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:47,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817365234] [2022-03-15 16:37:47,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:47,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:47,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:47,475 INFO L87 Difference]: Start difference. First operand 9193 states and 33786 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:48,114 INFO L93 Difference]: Finished difference Result 13437 states and 48057 transitions. [2022-03-15 16:37:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:37:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:48,150 INFO L225 Difference]: With dead ends: 13437 [2022-03-15 16:37:48,151 INFO L226 Difference]: Without dead ends: 13403 [2022-03-15 16:37:48,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:48,151 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 191 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:48,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 224 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 589 Invalid, 0 Unknown, 500 Unchecked, 0.3s Time] [2022-03-15 16:37:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13403 states. [2022-03-15 16:37:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13403 to 9206. [2022-03-15 16:37:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 3.6744160782183597) internal successors, (33823), 9205 states have internal predecessors, (33823), 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 16:37:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 33823 transitions. [2022-03-15 16:37:48,386 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 33823 transitions. Word has length 28 [2022-03-15 16:37:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:48,386 INFO L470 AbstractCegarLoop]: Abstraction has 9206 states and 33823 transitions. [2022-03-15 16:37:48,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 33823 transitions. [2022-03-15 16:37:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:48,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:48,402 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, 1, 1] [2022-03-15 16:37:48,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 16:37:48,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:48,603 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1764530886, now seen corresponding path program 45 times [2022-03-15 16:37:48,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:48,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427441013] [2022-03-15 16:37:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:48,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:48,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:48,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427441013] [2022-03-15 16:37:48,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427441013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:48,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198117912] [2022-03-15 16:37:48,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:48,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:48,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:48,799 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:48,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:37:48,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:37:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:49,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:49,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:37:49,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:49,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:49,263 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:49,264 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 30 treesize of output 55 [2022-03-15 16:37:49,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:49,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,357 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:49,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:49,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:49,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198117912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:49,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:49,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:49,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875310762] [2022-03-15 16:37:49,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:49,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:49,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:49,438 INFO L87 Difference]: Start difference. First operand 9206 states and 33823 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:50,062 INFO L93 Difference]: Finished difference Result 12508 states and 44818 transitions. [2022-03-15 16:37:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:37:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:50,094 INFO L225 Difference]: With dead ends: 12508 [2022-03-15 16:37:50,095 INFO L226 Difference]: Without dead ends: 12493 [2022-03-15 16:37:50,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:50,096 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:50,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 230 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 742 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-03-15 16:37:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2022-03-15 16:37:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 9248. [2022-03-15 16:37:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9248 states, 9247 states have (on average 3.6707040121120365) internal successors, (33943), 9247 states have internal predecessors, (33943), 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 16:37:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9248 states to 9248 states and 33943 transitions. [2022-03-15 16:37:50,261 INFO L78 Accepts]: Start accepts. Automaton has 9248 states and 33943 transitions. Word has length 28 [2022-03-15 16:37:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:50,261 INFO L470 AbstractCegarLoop]: Abstraction has 9248 states and 33943 transitions. [2022-03-15 16:37:50,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9248 states and 33943 transitions. [2022-03-15 16:37:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:50,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:50,275 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, 1, 1] [2022-03-15 16:37:50,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:37:50,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:50,491 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash -566926770, now seen corresponding path program 46 times [2022-03-15 16:37:50,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:50,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788243522] [2022-03-15 16:37:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:50,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:50,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788243522] [2022-03-15 16:37:50,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788243522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:50,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032922440] [2022-03-15 16:37:50,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:50,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:50,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:50,716 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:50,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:37:50,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:51,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:51,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:37:51,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:51,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:51,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:51,377 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 30 treesize of output 55 [2022-03-15 16:37:51,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:51,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:51,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,518 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:51,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:51,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:51,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:51,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:51,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032922440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:51,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:51,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:51,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028619411] [2022-03-15 16:37:51,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:51,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:51,632 INFO L87 Difference]: Start difference. First operand 9248 states and 33943 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:52,330 INFO L93 Difference]: Finished difference Result 13515 states and 48265 transitions. [2022-03-15 16:37:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:37:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:52,366 INFO L225 Difference]: With dead ends: 13515 [2022-03-15 16:37:52,366 INFO L226 Difference]: Without dead ends: 13481 [2022-03-15 16:37:52,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:52,367 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 169 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:52,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 222 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 686 Invalid, 0 Unknown, 406 Unchecked, 0.3s Time] [2022-03-15 16:37:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13481 states. [2022-03-15 16:37:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13481 to 9257. [2022-03-15 16:37:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 3.6697277441659466) internal successors, (33967), 9256 states have internal predecessors, (33967), 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 16:37:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 33967 transitions. [2022-03-15 16:37:52,563 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 33967 transitions. Word has length 28 [2022-03-15 16:37:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:52,563 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 33967 transitions. [2022-03-15 16:37:52,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 33967 transitions. [2022-03-15 16:37:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:52,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:52,579 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, 1, 1] [2022-03-15 16:37:52,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 16:37:52,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:37:52,794 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1619005942, now seen corresponding path program 47 times [2022-03-15 16:37:52,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:52,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150339244] [2022-03-15 16:37:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:52,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:52,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150339244] [2022-03-15 16:37:52,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150339244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:52,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111403204] [2022-03-15 16:37:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:52,998 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:53,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:37:53,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:53,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:53,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:37:53,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:37:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:53,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:53,486 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:53,486 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 30 treesize of output 55 [2022-03-15 16:37:53,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:53,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,615 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:53,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:53,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:53,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111403204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:53,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:53,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:53,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736529774] [2022-03-15 16:37:53,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:53,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:53,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:53,698 INFO L87 Difference]: Start difference. First operand 9257 states and 33967 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:54,207 INFO L93 Difference]: Finished difference Result 12480 states and 44746 transitions. [2022-03-15 16:37:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:37:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:54,236 INFO L225 Difference]: With dead ends: 12480 [2022-03-15 16:37:54,237 INFO L226 Difference]: Without dead ends: 12465 [2022-03-15 16:37:54,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:37:54,237 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:54,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 249 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 711 Invalid, 0 Unknown, 243 Unchecked, 0.2s Time] [2022-03-15 16:37:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2022-03-15 16:37:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 9233. [2022-03-15 16:37:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9233 states, 9232 states have (on average 3.6721187175043326) internal successors, (33901), 9232 states have internal predecessors, (33901), 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 16:37:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9233 states to 9233 states and 33901 transitions. [2022-03-15 16:37:54,411 INFO L78 Accepts]: Start accepts. Automaton has 9233 states and 33901 transitions. Word has length 28 [2022-03-15 16:37:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:54,411 INFO L470 AbstractCegarLoop]: Abstraction has 9233 states and 33901 transitions. [2022-03-15 16:37:54,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:37:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9233 states and 33901 transitions. [2022-03-15 16:37:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:54,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:54,427 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, 1, 1] [2022-03-15 16:37:54,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:54,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 16:37:54,636 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash -358633462, now seen corresponding path program 48 times [2022-03-15 16:37:54,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:54,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284390872] [2022-03-15 16:37:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:54,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:54,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284390872] [2022-03-15 16:37:54,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284390872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:54,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796498356] [2022-03-15 16:37:54,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:54,845 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:54,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:37:54,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:37:54,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:54,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:37:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:55,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:37:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:55,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:55,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:37:55,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:55,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 39 [2022-03-15 16:37:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:55,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:55,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:55,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:55,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:55,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 53 [2022-03-15 16:37:55,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:55,950 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:55,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:56,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:56,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:56,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796498356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:56,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:56,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-15 16:37:56,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549965455] [2022-03-15 16:37:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:56,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:37:56,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:37:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:56,061 INFO L87 Difference]: Start difference. First operand 9233 states and 33901 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:37:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:58,234 INFO L93 Difference]: Finished difference Result 17577 states and 61761 transitions. [2022-03-15 16:37:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:37:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:37:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:58,276 INFO L225 Difference]: With dead ends: 17577 [2022-03-15 16:37:58,276 INFO L226 Difference]: Without dead ends: 17521 [2022-03-15 16:37:58,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=655, Invalid=3505, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:37:58,276 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 291 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1575 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:58,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 535 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 904 Invalid, 0 Unknown, 1575 Unchecked, 0.4s Time] [2022-03-15 16:37:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17521 states. [2022-03-15 16:37:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17521 to 9214. [2022-03-15 16:37:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9214 states, 9213 states have (on average 3.6755671333984585) internal successors, (33863), 9213 states have internal predecessors, (33863), 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 16:37:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9214 states to 9214 states and 33863 transitions. [2022-03-15 16:37:58,494 INFO L78 Accepts]: Start accepts. Automaton has 9214 states and 33863 transitions. Word has length 28 [2022-03-15 16:37:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:58,494 INFO L470 AbstractCegarLoop]: Abstraction has 9214 states and 33863 transitions. [2022-03-15 16:37:58,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:37:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9214 states and 33863 transitions. [2022-03-15 16:37:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:37:58,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:58,509 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, 1, 1] [2022-03-15 16:37:58,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:37:58,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-15 16:37:58,725 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash 557263278, now seen corresponding path program 49 times [2022-03-15 16:37:58,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:58,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682713917] [2022-03-15 16:37:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:58,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:58,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682713917] [2022-03-15 16:37:58,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682713917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:58,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277231356] [2022-03-15 16:37:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:58,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:58,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:58,931 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:58,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:37:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:37:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:59,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:37:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:37:59,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:37:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:59,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:59,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:37:59,482 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 30 treesize of output 55 [2022-03-15 16:37:59,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:59,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:37:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,626 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:37:59,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:37:59,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:37:59,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:37:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:59,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277231356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:59,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:59,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:37:59,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916376417] [2022-03-15 16:37:59,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:59,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:37:59,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:37:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:59,750 INFO L87 Difference]: Start difference. First operand 9214 states and 33863 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:00,376 INFO L93 Difference]: Finished difference Result 12459 states and 44686 transitions. [2022-03-15 16:38:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:38:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:00,407 INFO L225 Difference]: With dead ends: 12459 [2022-03-15 16:38:00,407 INFO L226 Difference]: Without dead ends: 12444 [2022-03-15 16:38:00,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:38:00,408 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:00,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 866 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-03-15 16:38:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2022-03-15 16:38:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 9212. [2022-03-15 16:38:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9212 states, 9211 states have (on average 3.675605254586907) internal successors, (33856), 9211 states have internal predecessors, (33856), 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 16:38:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9212 states to 9212 states and 33856 transitions. [2022-03-15 16:38:00,649 INFO L78 Accepts]: Start accepts. Automaton has 9212 states and 33856 transitions. Word has length 28 [2022-03-15 16:38:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:00,649 INFO L470 AbstractCegarLoop]: Abstraction has 9212 states and 33856 transitions. [2022-03-15 16:38:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9212 states and 33856 transitions. [2022-03-15 16:38:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:00,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:00,666 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, 1, 1] [2022-03-15 16:38:00,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:00,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 16:38:00,881 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash -844598138, now seen corresponding path program 50 times [2022-03-15 16:38:00,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:00,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304432628] [2022-03-15 16:38:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:01,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:01,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304432628] [2022-03-15 16:38:01,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304432628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:01,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053042373] [2022-03-15 16:38:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:01,032 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:38:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:01,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:01,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:38:01,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:01,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:01,692 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:01,692 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 30 treesize of output 55 [2022-03-15 16:38:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:01,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:38:01,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,836 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:01,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:01,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:01,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053042373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:01,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:01,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:01,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847369114] [2022-03-15 16:38:01,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:01,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:01,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:01,967 INFO L87 Difference]: Start difference. First operand 9212 states and 33856 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:02,723 INFO L93 Difference]: Finished difference Result 12859 states and 45822 transitions. [2022-03-15 16:38:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:38:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:02,755 INFO L225 Difference]: With dead ends: 12859 [2022-03-15 16:38:02,755 INFO L226 Difference]: Without dead ends: 12835 [2022-03-15 16:38:02,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:02,755 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:02,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 220 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 659 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-03-15 16:38:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-03-15 16:38:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 9173. [2022-03-15 16:38:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9173 states, 9172 states have (on average 3.6788050588748367) internal successors, (33742), 9172 states have internal predecessors, (33742), 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 16:38:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9173 states to 9173 states and 33742 transitions. [2022-03-15 16:38:02,938 INFO L78 Accepts]: Start accepts. Automaton has 9173 states and 33742 transitions. Word has length 28 [2022-03-15 16:38:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:02,938 INFO L470 AbstractCegarLoop]: Abstraction has 9173 states and 33742 transitions. [2022-03-15 16:38:02,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9173 states and 33742 transitions. [2022-03-15 16:38:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:02,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:02,954 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, 1, 1] [2022-03-15 16:38:02,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:03,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:38:03,170 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1324401978, now seen corresponding path program 51 times [2022-03-15 16:38:03,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:03,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297630242] [2022-03-15 16:38:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:03,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:03,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297630242] [2022-03-15 16:38:03,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297630242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:03,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150397801] [2022-03-15 16:38:03,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:03,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:03,381 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:03,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:38:03,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:38:03,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:03,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:03,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:03,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:03,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:38:03,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:38:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:03,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:04,052 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:04,052 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 30 treesize of output 55 [2022-03-15 16:38:04,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:04,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:38:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:04,164 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:04,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:04,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:04,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:04,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:04,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150397801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:04,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:04,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:38:04,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631832519] [2022-03-15 16:38:04,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:04,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:38:04,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:38:04,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:38:04,272 INFO L87 Difference]: Start difference. First operand 9173 states and 33742 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:04,875 INFO L93 Difference]: Finished difference Result 13377 states and 47974 transitions. [2022-03-15 16:38:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:38:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:04,910 INFO L225 Difference]: With dead ends: 13377 [2022-03-15 16:38:04,910 INFO L226 Difference]: Without dead ends: 13370 [2022-03-15 16:38:04,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:38:04,911 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:04,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 265 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 705 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2022-03-15 16:38:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13370 states. [2022-03-15 16:38:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13370 to 9171. [2022-03-15 16:38:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.678516902944384) internal successors, (33732), 9170 states have internal predecessors, (33732), 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 16:38:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 33732 transitions. [2022-03-15 16:38:05,113 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 33732 transitions. Word has length 28 [2022-03-15 16:38:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:05,113 INFO L470 AbstractCegarLoop]: Abstraction has 9171 states and 33732 transitions. [2022-03-15 16:38:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 33732 transitions. [2022-03-15 16:38:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:05,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:05,129 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, 1, 1] [2022-03-15 16:38:05,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:05,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:05,345 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash 354999818, now seen corresponding path program 52 times [2022-03-15 16:38:05,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:05,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005991495] [2022-03-15 16:38:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:05,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:05,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005991495] [2022-03-15 16:38:05,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005991495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:05,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729921595] [2022-03-15 16:38:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:05,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:05,551 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:38:05,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:05,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:38:06,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:06,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:06,238 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:06,238 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 33 treesize of output 58 [2022-03-15 16:38:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:06,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:06,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,354 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:06,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:06,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:06,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:06,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729921595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:06,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:06,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:06,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102814996] [2022-03-15 16:38:06,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:06,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:06,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:06,479 INFO L87 Difference]: Start difference. First operand 9171 states and 33732 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:38:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:07,453 INFO L93 Difference]: Finished difference Result 12482 states and 44736 transitions. [2022-03-15 16:38:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:38:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:38:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:07,483 INFO L225 Difference]: With dead ends: 12482 [2022-03-15 16:38:07,483 INFO L226 Difference]: Without dead ends: 12457 [2022-03-15 16:38:07,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:07,484 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 125 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:07,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 320 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 905 Invalid, 0 Unknown, 323 Unchecked, 0.4s Time] [2022-03-15 16:38:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2022-03-15 16:38:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 9292. [2022-03-15 16:38:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 3.669465073727263) internal successors, (34093), 9291 states have internal predecessors, (34093), 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 16:38:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 34093 transitions. [2022-03-15 16:38:07,665 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 34093 transitions. Word has length 28 [2022-03-15 16:38:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:07,665 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 34093 transitions. [2022-03-15 16:38:07,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 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 16:38:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 34093 transitions. [2022-03-15 16:38:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:07,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:07,681 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, 1, 1] [2022-03-15 16:38:07,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:07,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:07,895 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1702130574, now seen corresponding path program 53 times [2022-03-15 16:38:07,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:07,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802272144] [2022-03-15 16:38:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:08,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802272144] [2022-03-15 16:38:08,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802272144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325946437] [2022-03-15 16:38:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:08,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:08,097 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:38:08,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:38:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:08,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:08,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:38:08,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:08,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:08,753 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 33 treesize of output 58 [2022-03-15 16:38:08,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:08,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:08,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,877 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:08,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:08,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:08,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325946437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:08,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:08,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:08,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648061973] [2022-03-15 16:38:08,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:08,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:08,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:08,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:08,963 INFO L87 Difference]: Start difference. First operand 9292 states and 34093 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:38:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:09,597 INFO L93 Difference]: Finished difference Result 12589 states and 45041 transitions. [2022-03-15 16:38:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:38:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:38:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:09,628 INFO L225 Difference]: With dead ends: 12589 [2022-03-15 16:38:09,628 INFO L226 Difference]: Without dead ends: 12586 [2022-03-15 16:38:09,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:38:09,628 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:09,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 354 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 831 Invalid, 0 Unknown, 305 Unchecked, 0.3s Time] [2022-03-15 16:38:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2022-03-15 16:38:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 9334. [2022-03-15 16:38:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9334 states, 9333 states have (on average 3.6664523732990464) internal successors, (34219), 9333 states have internal predecessors, (34219), 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 16:38:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 34219 transitions. [2022-03-15 16:38:09,844 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 34219 transitions. Word has length 28 [2022-03-15 16:38:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:09,844 INFO L470 AbstractCegarLoop]: Abstraction has 9334 states and 34219 transitions. [2022-03-15 16:38:09,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:38:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 34219 transitions. [2022-03-15 16:38:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:09,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:09,860 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, 1, 1] [2022-03-15 16:38:09,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:10,076 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1584538738, now seen corresponding path program 54 times [2022-03-15 16:38:10,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:10,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484026496] [2022-03-15 16:38:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:10,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484026496] [2022-03-15 16:38:10,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484026496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:10,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250585064] [2022-03-15 16:38:10,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:10,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:10,296 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:10,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:38:10,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:38:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:10,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:10,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:38:10,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:38:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:10,959 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:10,960 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 33 treesize of output 58 [2022-03-15 16:38:11,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:11,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:11,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:11,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:11,075 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:11,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:11,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:11,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:11,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250585064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:11,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:11,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:11,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015839586] [2022-03-15 16:38:11,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:11,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:11,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:11,171 INFO L87 Difference]: Start difference. First operand 9334 states and 34219 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:12,281 INFO L93 Difference]: Finished difference Result 13985 states and 49679 transitions. [2022-03-15 16:38:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:38:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:12,316 INFO L225 Difference]: With dead ends: 13985 [2022-03-15 16:38:12,316 INFO L226 Difference]: Without dead ends: 13978 [2022-03-15 16:38:12,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:38:12,316 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:12,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 366 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 860 Invalid, 0 Unknown, 474 Unchecked, 0.4s Time] [2022-03-15 16:38:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2022-03-15 16:38:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 9414. [2022-03-15 16:38:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9414 states, 9413 states have (on average 3.662912992669712) internal successors, (34479), 9413 states have internal predecessors, (34479), 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 16:38:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9414 states to 9414 states and 34479 transitions. [2022-03-15 16:38:12,520 INFO L78 Accepts]: Start accepts. Automaton has 9414 states and 34479 transitions. Word has length 28 [2022-03-15 16:38:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 9414 states and 34479 transitions. [2022-03-15 16:38:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 9414 states and 34479 transitions. [2022-03-15 16:38:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:12,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:12,535 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, 1, 1] [2022-03-15 16:38:12,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:12,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:12,751 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash 979658826, now seen corresponding path program 55 times [2022-03-15 16:38:12,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:12,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104267542] [2022-03-15 16:38:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:13,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104267542] [2022-03-15 16:38:13,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104267542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:13,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065987916] [2022-03-15 16:38:13,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:13,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:13,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:13,011 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:13,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:38:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:13,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:38:13,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:38:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:13,613 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:13,613 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 33 treesize of output 58 [2022-03-15 16:38:13,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:13,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,723 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:13,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:13,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065987916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:13,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:13,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:13,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048268020] [2022-03-15 16:38:13,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:13,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:13,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:13,820 INFO L87 Difference]: Start difference. First operand 9414 states and 34479 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:14,531 INFO L93 Difference]: Finished difference Result 12733 states and 45505 transitions. [2022-03-15 16:38:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:38:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:14,562 INFO L225 Difference]: With dead ends: 12733 [2022-03-15 16:38:14,562 INFO L226 Difference]: Without dead ends: 12622 [2022-03-15 16:38:14,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:14,563 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:14,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 273 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 757 Invalid, 0 Unknown, 359 Unchecked, 0.3s Time] [2022-03-15 16:38:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2022-03-15 16:38:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 9439. [2022-03-15 16:38:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9438 states have (on average 3.659991523627887) internal successors, (34543), 9438 states have internal predecessors, (34543), 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 16:38:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 34543 transitions. [2022-03-15 16:38:14,743 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 34543 transitions. Word has length 28 [2022-03-15 16:38:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:14,743 INFO L470 AbstractCegarLoop]: Abstraction has 9439 states and 34543 transitions. [2022-03-15 16:38:14,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 34543 transitions. [2022-03-15 16:38:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:14,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:14,758 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, 1, 1] [2022-03-15 16:38:14,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 16:38:14,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 16:38:14,963 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1048739190, now seen corresponding path program 56 times [2022-03-15 16:38:14,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:14,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790717087] [2022-03-15 16:38:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:15,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790717087] [2022-03-15 16:38:15,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790717087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:15,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965752217] [2022-03-15 16:38:15,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:15,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:15,185 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:15,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:38:15,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:15,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:15,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:38:15,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:38:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:15,694 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:15,695 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 33 treesize of output 58 [2022-03-15 16:38:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:15,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:38:15,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,776 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:15,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:15,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965752217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:15,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:15,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:38:15,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730161318] [2022-03-15 16:38:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:15,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:38:15,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:38:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:38:15,859 INFO L87 Difference]: Start difference. First operand 9439 states and 34543 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:16,591 INFO L93 Difference]: Finished difference Result 12769 states and 45644 transitions. [2022-03-15 16:38:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:38:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:16,624 INFO L225 Difference]: With dead ends: 12769 [2022-03-15 16:38:16,624 INFO L226 Difference]: Without dead ends: 12730 [2022-03-15 16:38:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:16,624 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:16,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 310 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1107 Invalid, 0 Unknown, 300 Unchecked, 0.4s Time] [2022-03-15 16:38:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12730 states. [2022-03-15 16:38:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12730 to 9472. [2022-03-15 16:38:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 9471 states have (on average 3.658747756308732) internal successors, (34652), 9471 states have internal predecessors, (34652), 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 16:38:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 34652 transitions. [2022-03-15 16:38:16,811 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 34652 transitions. Word has length 28 [2022-03-15 16:38:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:16,811 INFO L470 AbstractCegarLoop]: Abstraction has 9472 states and 34652 transitions. [2022-03-15 16:38:16,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 34652 transitions. [2022-03-15 16:38:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:16,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:16,828 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, 1, 1] [2022-03-15 16:38:16,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:38:17,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 16:38:17,035 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash -108766266, now seen corresponding path program 57 times [2022-03-15 16:38:17,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:17,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970417347] [2022-03-15 16:38:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:17,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:17,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970417347] [2022-03-15 16:38:17,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970417347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:17,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651637062] [2022-03-15 16:38:17,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:17,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:17,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:17,231 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:17,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:38:17,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:38:17,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:38:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:17,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:17,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:17,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:38:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:38:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:18,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:18,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:18,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 80 [2022-03-15 16:38:18,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:18,127 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:18,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:18,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:18,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:18,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:18,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651637062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:18,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:18,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:38:18,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440533132] [2022-03-15 16:38:18,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:38:18,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:38:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:38:18,217 INFO L87 Difference]: Start difference. First operand 9472 states and 34652 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 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 16:38:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:20,623 INFO L93 Difference]: Finished difference Result 16278 states and 56064 transitions. [2022-03-15 16:38:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:38:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 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 16:38:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:20,664 INFO L225 Difference]: With dead ends: 16278 [2022-03-15 16:38:20,664 INFO L226 Difference]: Without dead ends: 16256 [2022-03-15 16:38:20,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=814, Invalid=4442, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:38:20,665 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:20,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 478 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1298 Invalid, 0 Unknown, 768 Unchecked, 0.6s Time] [2022-03-15 16:38:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2022-03-15 16:38:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 9906. [2022-03-15 16:38:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9905 states have (on average 3.652700656234225) internal successors, (36180), 9905 states have internal predecessors, (36180), 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 16:38:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 36180 transitions. [2022-03-15 16:38:20,895 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 36180 transitions. Word has length 28 [2022-03-15 16:38:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:20,895 INFO L470 AbstractCegarLoop]: Abstraction has 9906 states and 36180 transitions. [2022-03-15 16:38:20,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 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 16:38:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 36180 transitions. [2022-03-15 16:38:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:20,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:20,912 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, 1, 1] [2022-03-15 16:38:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:21,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 16:38:21,127 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1016834634, now seen corresponding path program 58 times [2022-03-15 16:38:21,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:21,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379103053] [2022-03-15 16:38:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:21,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:21,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379103053] [2022-03-15 16:38:21,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379103053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:21,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793542124] [2022-03-15 16:38:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:21,344 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:21,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:38:21,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:21,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:21,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:21,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:38:21,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:21,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:21,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:21,877 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 33 treesize of output 58 [2022-03-15 16:38:21,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:21,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:21,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:21,970 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:21,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:22,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:22,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:22,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793542124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:22,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:22,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:22,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645459314] [2022-03-15 16:38:22,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:22,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:22,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:22,052 INFO L87 Difference]: Start difference. First operand 9906 states and 36180 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:22,931 INFO L93 Difference]: Finished difference Result 14522 states and 51606 transitions. [2022-03-15 16:38:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:38:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:22,972 INFO L225 Difference]: With dead ends: 14522 [2022-03-15 16:38:22,973 INFO L226 Difference]: Without dead ends: 14513 [2022-03-15 16:38:22,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:38:22,973 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 149 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:22,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 365 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 917 Invalid, 0 Unknown, 551 Unchecked, 0.4s Time] [2022-03-15 16:38:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-03-15 16:38:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 9810. [2022-03-15 16:38:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9810 states, 9809 states have (on average 3.657457437047609) internal successors, (35876), 9809 states have internal predecessors, (35876), 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 16:38:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9810 states to 9810 states and 35876 transitions. [2022-03-15 16:38:23,201 INFO L78 Accepts]: Start accepts. Automaton has 9810 states and 35876 transitions. Word has length 28 [2022-03-15 16:38:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 9810 states and 35876 transitions. [2022-03-15 16:38:23,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 9810 states and 35876 transitions. [2022-03-15 16:38:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:23,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:23,218 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, 1, 1] [2022-03-15 16:38:23,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 16:38:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:23,424 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1891089294, now seen corresponding path program 59 times [2022-03-15 16:38:23,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:23,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284638635] [2022-03-15 16:38:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:23,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:23,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284638635] [2022-03-15 16:38:23,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284638635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:23,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276113511] [2022-03-15 16:38:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:23,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:23,628 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:23,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:38:23,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:38:23,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:23,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:23,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:24,014 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 24 treesize of output 20 [2022-03-15 16:38:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:38:24,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:24,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:24,131 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:24,131 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 33 treesize of output 58 [2022-03-15 16:38:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:24,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:24,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,207 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:24,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:24,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:24,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276113511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:24,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:24,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:24,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661417924] [2022-03-15 16:38:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:24,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:24,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:24,289 INFO L87 Difference]: Start difference. First operand 9810 states and 35876 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:24,848 INFO L93 Difference]: Finished difference Result 13105 states and 46880 transitions. [2022-03-15 16:38:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:38:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:24,975 INFO L225 Difference]: With dead ends: 13105 [2022-03-15 16:38:24,975 INFO L226 Difference]: Without dead ends: 13054 [2022-03-15 16:38:24,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:24,976 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:24,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 227 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 626 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2022-03-15 16:38:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2022-03-15 16:38:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 9842. [2022-03-15 16:38:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9842 states, 9841 states have (on average 3.6547098872065846) internal successors, (35966), 9841 states have internal predecessors, (35966), 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 16:38:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9842 states to 9842 states and 35966 transitions. [2022-03-15 16:38:25,144 INFO L78 Accepts]: Start accepts. Automaton has 9842 states and 35966 transitions. Word has length 28 [2022-03-15 16:38:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:25,144 INFO L470 AbstractCegarLoop]: Abstraction has 9842 states and 35966 transitions. [2022-03-15 16:38:25,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:38:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9842 states and 35966 transitions. [2022-03-15 16:38:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:25,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:25,161 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, 1, 1] [2022-03-15 16:38:25,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:25,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:25,363 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash -137308722, now seen corresponding path program 60 times [2022-03-15 16:38:25,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:25,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508150995] [2022-03-15 16:38:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:25,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:25,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508150995] [2022-03-15 16:38:25,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508150995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:25,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953688390] [2022-03-15 16:38:25,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:25,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:25,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:25,563 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:25,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:38:25,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:38:25,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:38:25,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:25,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:25,965 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 24 treesize of output 20 [2022-03-15 16:38:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:25,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:38:26,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:38:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:26,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:26,254 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:26,254 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 33 treesize of output 58 [2022-03-15 16:38:26,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:26,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:38:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,341 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:26,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:26,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:26,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953688390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:26,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:26,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:38:26,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481123943] [2022-03-15 16:38:26,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:38:26,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:38:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:38:26,415 INFO L87 Difference]: Start difference. First operand 9842 states and 35966 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:28,031 INFO L93 Difference]: Finished difference Result 18659 states and 65671 transitions. [2022-03-15 16:38:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:38:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:28,074 INFO L225 Difference]: With dead ends: 18659 [2022-03-15 16:38:28,074 INFO L226 Difference]: Without dead ends: 18597 [2022-03-15 16:38:28,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:38:28,075 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:28,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 408 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1448 Invalid, 0 Unknown, 609 Unchecked, 0.5s Time] [2022-03-15 16:38:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18597 states. [2022-03-15 16:38:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18597 to 9919. [2022-03-15 16:38:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 9918 states have (on average 3.6527525710828797) internal successors, (36228), 9918 states have internal predecessors, (36228), 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 16:38:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 36228 transitions. [2022-03-15 16:38:28,303 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 36228 transitions. Word has length 28 [2022-03-15 16:38:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:28,303 INFO L470 AbstractCegarLoop]: Abstraction has 9919 states and 36228 transitions. [2022-03-15 16:38:28,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 36228 transitions. [2022-03-15 16:38:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:28,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:28,320 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, 1, 1] [2022-03-15 16:38:28,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:28,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:38:28,529 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2038960498, now seen corresponding path program 61 times [2022-03-15 16:38:28,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:28,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155217338] [2022-03-15 16:38:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:28,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:28,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155217338] [2022-03-15 16:38:28,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155217338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:28,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849532251] [2022-03-15 16:38:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:28,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:28,731 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:28,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:38:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:28,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:29,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:38:29,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:29,263 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:29,263 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 33 treesize of output 58 [2022-03-15 16:38:29,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:29,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:38:29,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,346 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:29,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:29,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:29,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:29,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849532251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:29,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:29,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:38:29,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101922137] [2022-03-15 16:38:29,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:29,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:38:29,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:38:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:38:29,423 INFO L87 Difference]: Start difference. First operand 9919 states and 36228 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:30,249 INFO L93 Difference]: Finished difference Result 13377 states and 47754 transitions. [2022-03-15 16:38:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:38:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:30,282 INFO L225 Difference]: With dead ends: 13377 [2022-03-15 16:38:30,282 INFO L226 Difference]: Without dead ends: 13362 [2022-03-15 16:38:30,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:38:30,282 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 159 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:30,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 299 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1020 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-03-15 16:38:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2022-03-15 16:38:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 9914. [2022-03-15 16:38:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 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 16:38:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-03-15 16:38:30,504 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-03-15 16:38:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-03-15 16:38:30,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-03-15 16:38:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:30,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:30,521 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, 1, 1] [2022-03-15 16:38:30,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:30,736 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1391298934, now seen corresponding path program 62 times [2022-03-15 16:38:30,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:30,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218984330] [2022-03-15 16:38:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:30,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:30,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218984330] [2022-03-15 16:38:30,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218984330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:30,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449592235] [2022-03-15 16:38:30,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:30,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:30,966 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:30,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:38:30,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:31,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:31,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:31,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:38:31,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:31,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:31,532 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:31,532 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 33 treesize of output 58 [2022-03-15 16:38:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:31,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:38:31,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,647 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:31,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:31,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:31,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449592235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:31,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:31,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:38:31,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415104491] [2022-03-15 16:38:31,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:31,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:38:31,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:38:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:38:31,765 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:32,449 INFO L93 Difference]: Finished difference Result 13306 states and 47539 transitions. [2022-03-15 16:38:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:38:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:32,483 INFO L225 Difference]: With dead ends: 13306 [2022-03-15 16:38:32,483 INFO L226 Difference]: Without dead ends: 13299 [2022-03-15 16:38:32,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:38:32,484 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:32,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 966 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-03-15 16:38:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-03-15 16:38:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 9914. [2022-03-15 16:38:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 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 16:38:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-03-15 16:38:32,682 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-03-15 16:38:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:32,682 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-03-15 16:38:32,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-03-15 16:38:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:32,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:32,699 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, 1, 1] [2022-03-15 16:38:32,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:32,912 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash -356959350, now seen corresponding path program 63 times [2022-03-15 16:38:32,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:32,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206988183] [2022-03-15 16:38:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:33,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:33,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206988183] [2022-03-15 16:38:33,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206988183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:33,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915776645] [2022-03-15 16:38:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:33,063 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:33,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:38:33,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:38:33,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:38:33,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:33,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:33,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:33,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2022-03-15 16:38:33,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:33,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:33,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 99 [2022-03-15 16:38:33,492 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 73 treesize of output 61 [2022-03-15 16:38:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:34,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:34,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:34,559 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 56 treesize of output 89 [2022-03-15 16:38:35,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:35,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:35,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 6 [2022-03-15 16:38:35,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:35,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-15 16:38:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:35,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915776645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:35,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:35,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:38:35,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206935273] [2022-03-15 16:38:35,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:35,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:38:35,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:38:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:38:35,281 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:42,618 INFO L93 Difference]: Finished difference Result 20598 states and 71371 transitions. [2022-03-15 16:38:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-15 16:38:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:42,672 INFO L225 Difference]: With dead ends: 20598 [2022-03-15 16:38:42,672 INFO L226 Difference]: Without dead ends: 20571 [2022-03-15 16:38:42,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2179, Invalid=14591, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 16:38:42,674 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 391 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3613 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:42,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 591 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 879 Invalid, 0 Unknown, 3613 Unchecked, 0.4s Time] [2022-03-15 16:38:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-03-15 16:38:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10172. [2022-03-15 16:38:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10172 states, 10171 states have (on average 3.6481171959492675) internal successors, (37105), 10171 states have internal predecessors, (37105), 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 16:38:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 37105 transitions. [2022-03-15 16:38:43,013 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 37105 transitions. Word has length 28 [2022-03-15 16:38:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:43,014 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 37105 transitions. [2022-03-15 16:38:43,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 37105 transitions. [2022-03-15 16:38:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:43,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:43,032 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, 1, 1] [2022-03-15 16:38:43,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:38:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-15 16:38:43,247 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash -49784884, now seen corresponding path program 64 times [2022-03-15 16:38:43,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:43,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976753326] [2022-03-15 16:38:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:43,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:43,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:43,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976753326] [2022-03-15 16:38:43,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976753326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:43,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680111788] [2022-03-15 16:38:43,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:43,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:43,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:43,455 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:43,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:38:43,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:43,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:43,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:43,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:38:43,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:43,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:44,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:44,112 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 33 treesize of output 58 [2022-03-15 16:38:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:44,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:44,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:44,238 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:44,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:44,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:44,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680111788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:44,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:44,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:44,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490034142] [2022-03-15 16:38:44,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:44,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:44,354 INFO L87 Difference]: Start difference. First operand 10172 states and 37105 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:38:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:44,660 INFO L93 Difference]: Finished difference Result 10593 states and 38328 transitions. [2022-03-15 16:38:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:38:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:38:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:44,686 INFO L225 Difference]: With dead ends: 10593 [2022-03-15 16:38:44,686 INFO L226 Difference]: Without dead ends: 10553 [2022-03-15 16:38:44,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:38:44,686 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:44,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-03-15 16:38:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10553 states. [2022-03-15 16:38:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10553 to 10210. [2022-03-15 16:38:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 3.6463904398080125) internal successors, (37226), 10209 states have internal predecessors, (37226), 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 16:38:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 37226 transitions. [2022-03-15 16:38:44,863 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 37226 transitions. Word has length 28 [2022-03-15 16:38:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:44,863 INFO L470 AbstractCegarLoop]: Abstraction has 10210 states and 37226 transitions. [2022-03-15 16:38:44,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:38:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 37226 transitions. [2022-03-15 16:38:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:44,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:44,880 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, 1, 1] [2022-03-15 16:38:44,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:45,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:45,096 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2306790, now seen corresponding path program 65 times [2022-03-15 16:38:45,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:45,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174842090] [2022-03-15 16:38:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:45,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:45,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174842090] [2022-03-15 16:38:45,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174842090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:45,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042988499] [2022-03-15 16:38:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:45,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:45,341 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:45,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:38:45,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:38:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:38:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:45,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:45,944 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-15 16:38:45,944 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 178 [2022-03-15 16:38:45,957 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-15 16:38:45,958 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 97 [2022-03-15 16:38:45,960 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 20 treesize of output 16 [2022-03-15 16:38:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:46,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,175 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:46,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-03-15 16:38:46,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:46,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:46,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:46,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-15 16:38:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:46,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:46,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042988499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:46,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:46,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:38:46,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074939421] [2022-03-15 16:38:46,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:46,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:38:46,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:38:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:38:46,385 INFO L87 Difference]: Start difference. First operand 10210 states and 37226 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:47,912 INFO L93 Difference]: Finished difference Result 14804 states and 52195 transitions. [2022-03-15 16:38:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:38:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:47,950 INFO L225 Difference]: With dead ends: 14804 [2022-03-15 16:38:47,950 INFO L226 Difference]: Without dead ends: 14752 [2022-03-15 16:38:47,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:38:47,951 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 206 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:47,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 378 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1409 Invalid, 0 Unknown, 388 Unchecked, 0.7s Time] [2022-03-15 16:38:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2022-03-15 16:38:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 10399. [2022-03-15 16:38:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 10398 states have (on average 3.6400269282554336) internal successors, (37849), 10398 states have internal predecessors, (37849), 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 16:38:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 37849 transitions. [2022-03-15 16:38:48,171 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 37849 transitions. Word has length 28 [2022-03-15 16:38:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:48,171 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 37849 transitions. [2022-03-15 16:38:48,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:38:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 37849 transitions. [2022-03-15 16:38:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:48,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:48,188 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, 1, 1] [2022-03-15 16:38:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 16:38:48,403 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1205094514, now seen corresponding path program 66 times [2022-03-15 16:38:48,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:48,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396256526] [2022-03-15 16:38:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:48,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:48,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396256526] [2022-03-15 16:38:48,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396256526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:48,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349861619] [2022-03-15 16:38:48,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:48,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:48,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:48,701 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:48,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:38:48,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:38:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:38:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:48,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:38:49,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:49,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2022-03-15 16:38:49,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:49,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:49,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 74 [2022-03-15 16:38:49,079 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 48 treesize of output 40 [2022-03-15 16:38:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:49,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:49,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:49,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:49,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-03-15 16:38:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:50,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:50,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:38:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:50,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349861619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:50,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:50,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:38:50,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426885123] [2022-03-15 16:38:50,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:50,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:38:50,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:38:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:38:50,412 INFO L87 Difference]: Start difference. First operand 10399 states and 37849 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:55,693 INFO L93 Difference]: Finished difference Result 24273 states and 83766 transitions. [2022-03-15 16:38:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:38:55,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:55,759 INFO L225 Difference]: With dead ends: 24273 [2022-03-15 16:38:55,759 INFO L226 Difference]: Without dead ends: 24230 [2022-03-15 16:38:55,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1801, Invalid=10855, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 16:38:55,760 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 395 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2848 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:55,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 457 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 890 Invalid, 0 Unknown, 2848 Unchecked, 0.5s Time] [2022-03-15 16:38:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24230 states. [2022-03-15 16:38:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24230 to 10392. [2022-03-15 16:38:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 10391 states have (on average 3.6389182946780867) internal successors, (37812), 10391 states have internal predecessors, (37812), 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 16:38:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 37812 transitions. [2022-03-15 16:38:56,073 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 37812 transitions. Word has length 28 [2022-03-15 16:38:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:56,074 INFO L470 AbstractCegarLoop]: Abstraction has 10392 states and 37812 transitions. [2022-03-15 16:38:56,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:38:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 37812 transitions. [2022-03-15 16:38:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:56,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:56,092 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, 1, 1] [2022-03-15 16:38:56,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:56,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 16:38:56,305 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2027457418, now seen corresponding path program 67 times [2022-03-15 16:38:56,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:56,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024043432] [2022-03-15 16:38:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:56,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:56,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024043432] [2022-03-15 16:38:56,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024043432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:56,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758266588] [2022-03-15 16:38:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:56,505 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:56,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:38:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:56,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:56,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:56,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:56,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:38:57,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:57,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:57,179 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:57,180 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 33 treesize of output 58 [2022-03-15 16:38:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:57,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:38:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:57,284 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:57,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:57,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:57,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:38:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:57,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758266588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:57,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:57,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:38:57,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613891941] [2022-03-15 16:38:57,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:57,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:38:57,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:38:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:38:57,362 INFO L87 Difference]: Start difference. First operand 10392 states and 37812 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:58,078 INFO L93 Difference]: Finished difference Result 15139 states and 53769 transitions. [2022-03-15 16:38:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:38:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:58,117 INFO L225 Difference]: With dead ends: 15139 [2022-03-15 16:38:58,118 INFO L226 Difference]: Without dead ends: 15122 [2022-03-15 16:38:58,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:38:58,118 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:58,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 311 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 695 Invalid, 0 Unknown, 276 Unchecked, 0.3s Time] [2022-03-15 16:38:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15122 states. [2022-03-15 16:38:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15122 to 10411. [2022-03-15 16:38:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 3.6359269932756964) internal successors, (37850), 10410 states have internal predecessors, (37850), 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 16:38:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 37850 transitions. [2022-03-15 16:38:58,345 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 37850 transitions. Word has length 28 [2022-03-15 16:38:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:58,345 INFO L470 AbstractCegarLoop]: Abstraction has 10411 states and 37850 transitions. [2022-03-15 16:38:58,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:38:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 37850 transitions. [2022-03-15 16:38:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:38:58,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:58,363 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, 1, 1] [2022-03-15 16:38:58,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:58,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:58,579 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1960335412, now seen corresponding path program 68 times [2022-03-15 16:38:58,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:58,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628084264] [2022-03-15 16:38:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:58,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:58,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:58,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628084264] [2022-03-15 16:38:58,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628084264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:58,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194834872] [2022-03-15 16:38:58,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:58,731 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:58,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:38:58,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:58,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:38:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:58,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:38:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:59,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-15 16:38:59,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:38:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:59,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:59,325 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:59,325 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 33 treesize of output 58 [2022-03-15 16:38:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:59,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:38:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,443 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:38:59,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:38:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:59,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:38:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:59,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194834872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:59,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:59,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:38:59,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370593328] [2022-03-15 16:38:59,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:59,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:38:59,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:38:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:59,574 INFO L87 Difference]: Start difference. First operand 10411 states and 37850 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:39:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:00,319 INFO L93 Difference]: Finished difference Result 14636 states and 51837 transitions. [2022-03-15 16:39:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:39:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:39:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:00,357 INFO L225 Difference]: With dead ends: 14636 [2022-03-15 16:39:00,357 INFO L226 Difference]: Without dead ends: 14600 [2022-03-15 16:39:00,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:00,357 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:00,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 316 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 736 Invalid, 0 Unknown, 424 Unchecked, 0.4s Time] [2022-03-15 16:39:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14600 states. [2022-03-15 16:39:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14600 to 10391. [2022-03-15 16:39:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10391 states, 10390 states have (on average 3.63888354186718) internal successors, (37808), 10390 states have internal predecessors, (37808), 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 16:39:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10391 states to 10391 states and 37808 transitions. [2022-03-15 16:39:00,570 INFO L78 Accepts]: Start accepts. Automaton has 10391 states and 37808 transitions. Word has length 28 [2022-03-15 16:39:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:00,570 INFO L470 AbstractCegarLoop]: Abstraction has 10391 states and 37808 transitions. [2022-03-15 16:39:00,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:39:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 10391 states and 37808 transitions. [2022-03-15 16:39:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:00,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:00,588 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, 1, 1] [2022-03-15 16:39:00,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:00,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:00,791 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1530883958, now seen corresponding path program 69 times [2022-03-15 16:39:00,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:00,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149311200] [2022-03-15 16:39:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:01,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:01,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149311200] [2022-03-15 16:39:01,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149311200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:01,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769004573] [2022-03-15 16:39:01,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:01,029 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:01,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:39:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:01,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:39:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:01,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:01,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2022-03-15 16:39:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:01,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2022-03-15 16:39:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:01,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:02,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:02,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:02,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 59 [2022-03-15 16:39:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:02,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-03-15 16:39:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:02,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769004573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:02,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:02,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 16:39:02,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230098518] [2022-03-15 16:39:02,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:02,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:02,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:02,376 INFO L87 Difference]: Start difference. First operand 10391 states and 37808 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:39:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:08,161 INFO L93 Difference]: Finished difference Result 25149 states and 87653 transitions. [2022-03-15 16:39:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:39:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:39:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:08,235 INFO L225 Difference]: With dead ends: 25149 [2022-03-15 16:39:08,235 INFO L226 Difference]: Without dead ends: 25120 [2022-03-15 16:39:08,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1856, Invalid=11484, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 16:39:08,236 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 550 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1903 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:08,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 573 Invalid, 3092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1041 Invalid, 0 Unknown, 1903 Unchecked, 0.6s Time] [2022-03-15 16:39:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25120 states. [2022-03-15 16:39:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25120 to 10527. [2022-03-15 16:39:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10527 states, 10526 states have (on average 3.6303439103173094) internal successors, (38213), 10526 states have internal predecessors, (38213), 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 16:39:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10527 states to 10527 states and 38213 transitions. [2022-03-15 16:39:08,569 INFO L78 Accepts]: Start accepts. Automaton has 10527 states and 38213 transitions. Word has length 28 [2022-03-15 16:39:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:08,569 INFO L470 AbstractCegarLoop]: Abstraction has 10527 states and 38213 transitions. [2022-03-15 16:39:08,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 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 16:39:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10527 states and 38213 transitions. [2022-03-15 16:39:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:08,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:08,586 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, 1, 1] [2022-03-15 16:39:08,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:39:08,802 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 824544782, now seen corresponding path program 70 times [2022-03-15 16:39:08,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:08,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782708130] [2022-03-15 16:39:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:08,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:08,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782708130] [2022-03-15 16:39:08,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782708130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:08,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130554089] [2022-03-15 16:39:08,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:08,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:08,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:08,992 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:08,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:39:09,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:09,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:09,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:09,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:39:09,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-15 16:39:09,365 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 16:39:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:09,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:09,533 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:09,534 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 33 treesize of output 58 [2022-03-15 16:39:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:09,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:09,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:09,653 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:09,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:09,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:09,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:09,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130554089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:09,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:09,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:09,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162323865] [2022-03-15 16:39:09,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:09,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:09,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:09,785 INFO L87 Difference]: Start difference. First operand 10527 states and 38213 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:11,272 INFO L93 Difference]: Finished difference Result 16564 states and 58524 transitions. [2022-03-15 16:39:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:39:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:11,316 INFO L225 Difference]: With dead ends: 16564 [2022-03-15 16:39:11,316 INFO L226 Difference]: Without dead ends: 16549 [2022-03-15 16:39:11,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:39:11,317 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 163 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:11,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 314 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:39:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16549 states. [2022-03-15 16:39:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16549 to 10528. [2022-03-15 16:39:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 10527 states have (on average 3.631613945093569) internal successors, (38230), 10527 states have internal predecessors, (38230), 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 16:39:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 38230 transitions. [2022-03-15 16:39:11,657 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 38230 transitions. Word has length 28 [2022-03-15 16:39:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 10528 states and 38230 transitions. [2022-03-15 16:39:11,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 38230 transitions. [2022-03-15 16:39:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:11,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:11,675 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, 1, 1] [2022-03-15 16:39:11,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:11,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 16:39:11,891 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -228189426, now seen corresponding path program 71 times [2022-03-15 16:39:11,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:11,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602882439] [2022-03-15 16:39:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:12,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:12,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602882439] [2022-03-15 16:39:12,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602882439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:12,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922003795] [2022-03-15 16:39:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:12,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:12,089 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:12,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:39:12,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:39:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:12,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:12,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:39:12,423 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 14 [2022-03-15 16:39:12,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-15 16:39:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:12,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:12,578 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:12,579 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 33 treesize of output 58 [2022-03-15 16:39:12,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:12,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:12,680 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:12,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:12,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:12,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:12,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922003795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:12,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:12,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:12,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633744871] [2022-03-15 16:39:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:12,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:12,789 INFO L87 Difference]: Start difference. First operand 10528 states and 38230 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:13,253 INFO L93 Difference]: Finished difference Result 10805 states and 39021 transitions. [2022-03-15 16:39:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:39:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:13,278 INFO L225 Difference]: With dead ends: 10805 [2022-03-15 16:39:13,278 INFO L226 Difference]: Without dead ends: 10728 [2022-03-15 16:39:13,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:39:13,279 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:13,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 214 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-03-15 16:39:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10558. [2022-03-15 16:39:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10558 states, 10557 states have (on average 3.63010324902908) internal successors, (38323), 10557 states have internal predecessors, (38323), 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 16:39:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 38323 transitions. [2022-03-15 16:39:13,484 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 38323 transitions. Word has length 28 [2022-03-15 16:39:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:13,484 INFO L470 AbstractCegarLoop]: Abstraction has 10558 states and 38323 transitions. [2022-03-15 16:39:13,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 38323 transitions. [2022-03-15 16:39:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:13,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:13,509 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, 1, 1] [2022-03-15 16:39:13,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:13,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:13,726 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 839685138, now seen corresponding path program 72 times [2022-03-15 16:39:13,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:13,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035709801] [2022-03-15 16:39:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:13,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:13,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:13,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035709801] [2022-03-15 16:39:13,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035709801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:13,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709168591] [2022-03-15 16:39:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:13,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:13,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:13,939 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:13,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:39:13,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:39:13,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:14,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:14,142 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 24 treesize of output 20 [2022-03-15 16:39:14,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-15 16:39:14,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-15 16:39:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:14,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:14,285 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:14,285 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 33 treesize of output 58 [2022-03-15 16:39:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:14,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:14,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:14,378 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:14,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:14,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:14,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709168591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:14,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:14,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:14,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051010298] [2022-03-15 16:39:14,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:14,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:14,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:14,459 INFO L87 Difference]: Start difference. First operand 10558 states and 38323 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:15,343 INFO L93 Difference]: Finished difference Result 14029 states and 50015 transitions. [2022-03-15 16:39:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:39:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:15,377 INFO L225 Difference]: With dead ends: 14029 [2022-03-15 16:39:15,378 INFO L226 Difference]: Without dead ends: 14001 [2022-03-15 16:39:15,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:39:15,378 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 108 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:15,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 313 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:39:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14001 states. [2022-03-15 16:39:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14001 to 10577. [2022-03-15 16:39:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10577 states, 10576 states have (on average 3.63142965204236) internal successors, (38406), 10576 states have internal predecessors, (38406), 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 16:39:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 38406 transitions. [2022-03-15 16:39:15,577 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 38406 transitions. Word has length 28 [2022-03-15 16:39:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:15,577 INFO L470 AbstractCegarLoop]: Abstraction has 10577 states and 38406 transitions. [2022-03-15 16:39:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 38406 transitions. [2022-03-15 16:39:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:15,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:15,598 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, 1, 1] [2022-03-15 16:39:15,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:15,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:15,814 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1348931822, now seen corresponding path program 73 times [2022-03-15 16:39:15,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:15,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604792991] [2022-03-15 16:39:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:16,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:16,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604792991] [2022-03-15 16:39:16,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604792991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:16,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933446586] [2022-03-15 16:39:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:16,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:16,026 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:16,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:39:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:16,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:16,351 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 24 treesize of output 20 [2022-03-15 16:39:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:16,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:39:16,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:39:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:16,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:16,602 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:16,603 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 34 treesize of output 59 [2022-03-15 16:39:16,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:16,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:16,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,712 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:16,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:16,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:39:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:16,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933446586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:16,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:16,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:16,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295873477] [2022-03-15 16:39:16,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:16,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:16,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:16,828 INFO L87 Difference]: Start difference. First operand 10577 states and 38406 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:17,310 INFO L93 Difference]: Finished difference Result 10800 states and 39061 transitions. [2022-03-15 16:39:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:39:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:17,335 INFO L225 Difference]: With dead ends: 10800 [2022-03-15 16:39:17,335 INFO L226 Difference]: Without dead ends: 10775 [2022-03-15 16:39:17,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:39:17,336 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:17,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-03-15 16:39:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 10612. [2022-03-15 16:39:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 3.6314202242955425) internal successors, (38533), 10611 states have internal predecessors, (38533), 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 16:39:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 38533 transitions. [2022-03-15 16:39:17,510 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 38533 transitions. Word has length 28 [2022-03-15 16:39:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:17,510 INFO L470 AbstractCegarLoop]: Abstraction has 10612 states and 38533 transitions. [2022-03-15 16:39:17,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 38533 transitions. [2022-03-15 16:39:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:17,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:17,527 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, 1, 1] [2022-03-15 16:39:17,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 16:39:17,743 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1958543862, now seen corresponding path program 74 times [2022-03-15 16:39:17,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:17,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700715741] [2022-03-15 16:39:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:17,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:17,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700715741] [2022-03-15 16:39:17,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700715741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:17,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539343548] [2022-03-15 16:39:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:17,960 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:39:18,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:18,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:18,229 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 31 treesize of output 27 [2022-03-15 16:39:18,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-15 16:39:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:18,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-15 16:39:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:18,472 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:18,472 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 34 treesize of output 59 [2022-03-15 16:39:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:18,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,565 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:18,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:18,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:39:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539343548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:18,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:18,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:18,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034175068] [2022-03-15 16:39:18,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:18,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:18,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:18,652 INFO L87 Difference]: Start difference. First operand 10612 states and 38533 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:19,126 INFO L93 Difference]: Finished difference Result 10784 states and 39039 transitions. [2022-03-15 16:39:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:39:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:19,153 INFO L225 Difference]: With dead ends: 10784 [2022-03-15 16:39:19,153 INFO L226 Difference]: Without dead ends: 10769 [2022-03-15 16:39:19,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:39:19,154 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:19,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 192 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2022-03-15 16:39:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 10619. [2022-03-15 16:39:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.631851572800904) internal successors, (38563), 10618 states have internal predecessors, (38563), 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 16:39:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 38563 transitions. [2022-03-15 16:39:19,343 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 38563 transitions. Word has length 28 [2022-03-15 16:39:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:19,343 INFO L470 AbstractCegarLoop]: Abstraction has 10619 states and 38563 transitions. [2022-03-15 16:39:19,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 38563 transitions. [2022-03-15 16:39:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:19,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:19,397 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, 1, 1] [2022-03-15 16:39:19,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:39:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:19,612 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:19,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1830535506, now seen corresponding path program 75 times [2022-03-15 16:39:19,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:19,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761290320] [2022-03-15 16:39:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:19,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:19,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:19,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761290320] [2022-03-15 16:39:19,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761290320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:19,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90587250] [2022-03-15 16:39:19,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:19,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:19,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:19,798 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:19,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:39:19,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:19,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:39:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:19,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:20,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:20,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 56 [2022-03-15 16:39:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:20,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:20,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 82 [2022-03-15 16:39:20,420 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 52 treesize of output 44 [2022-03-15 16:39:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:20,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:20,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:20,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:39:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:21,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:21,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-03-15 16:39:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:21,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90587250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:21,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:21,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-15 16:39:21,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168642945] [2022-03-15 16:39:21,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:39:21,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:39:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:39:21,500 INFO L87 Difference]: Start difference. First operand 10619 states and 38563 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:24,010 INFO L93 Difference]: Finished difference Result 18254 states and 64192 transitions. [2022-03-15 16:39:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:39:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:24,116 INFO L225 Difference]: With dead ends: 18254 [2022-03-15 16:39:24,116 INFO L226 Difference]: Without dead ends: 18126 [2022-03-15 16:39:24,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=557, Invalid=5295, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:39:24,116 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 238 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:24,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 436 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 645 Invalid, 0 Unknown, 1552 Unchecked, 0.3s Time] [2022-03-15 16:39:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2022-03-15 16:39:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 10703. [2022-03-15 16:39:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10703 states, 10702 states have (on average 3.6252102410764344) internal successors, (38797), 10702 states have internal predecessors, (38797), 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 16:39:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 38797 transitions. [2022-03-15 16:39:24,344 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 38797 transitions. Word has length 28 [2022-03-15 16:39:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:24,344 INFO L470 AbstractCegarLoop]: Abstraction has 10703 states and 38797 transitions. [2022-03-15 16:39:24,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 38797 transitions. [2022-03-15 16:39:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:24,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:24,380 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, 1, 1] [2022-03-15 16:39:24,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:24,581 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1712762762, now seen corresponding path program 76 times [2022-03-15 16:39:24,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:24,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839849420] [2022-03-15 16:39:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:24,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:24,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839849420] [2022-03-15 16:39:24,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839849420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:24,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652312614] [2022-03-15 16:39:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:24,775 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:24,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:39:24,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:24,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:24,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:25,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:39:25,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:39:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:25,436 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:25,436 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 33 treesize of output 58 [2022-03-15 16:39:25,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:25,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:39:25,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,563 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:25,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:25,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:25,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:39:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:25,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652312614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:25,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:25,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:25,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757590646] [2022-03-15 16:39:25,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:25,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:25,684 INFO L87 Difference]: Start difference. First operand 10703 states and 38797 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:26,764 INFO L93 Difference]: Finished difference Result 15689 states and 55485 transitions. [2022-03-15 16:39:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:39:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:26,803 INFO L225 Difference]: With dead ends: 15689 [2022-03-15 16:39:26,803 INFO L226 Difference]: Without dead ends: 15614 [2022-03-15 16:39:26,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:39:26,804 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 339 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1001 Invalid, 0 Unknown, 395 Unchecked, 0.5s Time] [2022-03-15 16:39:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15614 states. [2022-03-15 16:39:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15614 to 10735. [2022-03-15 16:39:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10735 states, 10734 states have (on average 3.6251164523942614) internal successors, (38912), 10734 states have internal predecessors, (38912), 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 16:39:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10735 states to 10735 states and 38912 transitions. [2022-03-15 16:39:27,093 INFO L78 Accepts]: Start accepts. Automaton has 10735 states and 38912 transitions. Word has length 28 [2022-03-15 16:39:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:27,093 INFO L470 AbstractCegarLoop]: Abstraction has 10735 states and 38912 transitions. [2022-03-15 16:39:27,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10735 states and 38912 transitions. [2022-03-15 16:39:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:27,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:27,112 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, 1, 1] [2022-03-15 16:39:27,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:27,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:27,321 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash 436033774, now seen corresponding path program 77 times [2022-03-15 16:39:27,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:27,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339069881] [2022-03-15 16:39:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:27,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:27,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339069881] [2022-03-15 16:39:27,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339069881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:27,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445921219] [2022-03-15 16:39:27,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:27,592 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:27,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:39:27,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:27,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:27,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:27,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:39:28,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:39:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:28,177 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:28,177 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 33 treesize of output 58 [2022-03-15 16:39:28,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:28,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:28,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:39:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:28,265 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:28,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:28,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:39:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445921219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:28,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:28,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:28,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654506363] [2022-03-15 16:39:28,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:28,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:28,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:28,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:28,344 INFO L87 Difference]: Start difference. First operand 10735 states and 38912 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:28,962 INFO L93 Difference]: Finished difference Result 14307 states and 50819 transitions. [2022-03-15 16:39:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:39:28,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:29,000 INFO L225 Difference]: With dead ends: 14307 [2022-03-15 16:39:29,000 INFO L226 Difference]: Without dead ends: 14169 [2022-03-15 16:39:29,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:39:29,000 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 165 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:29,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 248 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 811 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-03-15 16:39:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14169 states. [2022-03-15 16:39:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14169 to 10786. [2022-03-15 16:39:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10786 states, 10785 states have (on average 3.6205841446453406) internal successors, (39048), 10785 states have internal predecessors, (39048), 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 16:39:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10786 states to 10786 states and 39048 transitions. [2022-03-15 16:39:29,295 INFO L78 Accepts]: Start accepts. Automaton has 10786 states and 39048 transitions. Word has length 28 [2022-03-15 16:39:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:29,295 INFO L470 AbstractCegarLoop]: Abstraction has 10786 states and 39048 transitions. [2022-03-15 16:39:29,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10786 states and 39048 transitions. [2022-03-15 16:39:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:29,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:29,313 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, 1, 1] [2022-03-15 16:39:29,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:29,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-15 16:39:29,527 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1294735958, now seen corresponding path program 78 times [2022-03-15 16:39:29,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:29,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058569238] [2022-03-15 16:39:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:29,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:29,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058569238] [2022-03-15 16:39:29,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058569238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:29,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140409251] [2022-03-15 16:39:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:29,755 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:29,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:39:29,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:39:29,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:39:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:29,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:30,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:30,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:30,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 50 [2022-03-15 16:39:30,103 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 69 treesize of output 59 [2022-03-15 16:39:30,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:30,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 58 [2022-03-15 16:39:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:30,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:30,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:30,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:39:30,829 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:39:30,829 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 45 treesize of output 70 [2022-03-15 16:39:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:31,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140409251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:31,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:31,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:39:31,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171635115] [2022-03-15 16:39:31,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:39:31,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:39:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:39:31,208 INFO L87 Difference]: Start difference. First operand 10786 states and 39048 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:39:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:34,552 INFO L93 Difference]: Finished difference Result 22215 states and 76572 transitions. [2022-03-15 16:39:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:39:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:39:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:34,607 INFO L225 Difference]: With dead ends: 22215 [2022-03-15 16:39:34,607 INFO L226 Difference]: Without dead ends: 22047 [2022-03-15 16:39:34,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1143, Invalid=7599, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:39:34,608 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 499 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1524 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:34,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 501 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1384 Invalid, 0 Unknown, 1524 Unchecked, 0.7s Time] [2022-03-15 16:39:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22047 states. [2022-03-15 16:39:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22047 to 10926. [2022-03-15 16:39:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10926 states, 10925 states have (on average 3.6135469107551486) internal successors, (39478), 10925 states have internal predecessors, (39478), 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 16:39:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10926 states to 10926 states and 39478 transitions. [2022-03-15 16:39:34,884 INFO L78 Accepts]: Start accepts. Automaton has 10926 states and 39478 transitions. Word has length 28 [2022-03-15 16:39:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:34,884 INFO L470 AbstractCegarLoop]: Abstraction has 10926 states and 39478 transitions. [2022-03-15 16:39:34,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 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 16:39:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10926 states and 39478 transitions. [2022-03-15 16:39:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:34,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:34,902 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, 1, 1] [2022-03-15 16:39:34,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:35,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 16:39:35,118 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1101740526, now seen corresponding path program 79 times [2022-03-15 16:39:35,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:35,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176065958] [2022-03-15 16:39:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:35,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176065958] [2022-03-15 16:39:35,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176065958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:35,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209009890] [2022-03-15 16:39:35,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:35,329 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:35,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:39:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:35,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:35,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:39:35,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:39:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:35,946 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:35,946 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 33 treesize of output 58 [2022-03-15 16:39:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:39:36,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,084 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:36,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:36,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:36,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:39:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:36,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209009890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:36,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:36,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:36,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399790920] [2022-03-15 16:39:36,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:36,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:36,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:36,223 INFO L87 Difference]: Start difference. First operand 10926 states and 39478 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:37,064 INFO L93 Difference]: Finished difference Result 14564 states and 51592 transitions. [2022-03-15 16:39:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:39:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:37,104 INFO L225 Difference]: With dead ends: 14564 [2022-03-15 16:39:37,104 INFO L226 Difference]: Without dead ends: 14538 [2022-03-15 16:39:37,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:37,104 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:37,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 303 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1174 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-03-15 16:39:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2022-03-15 16:39:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 10947. [2022-03-15 16:39:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 3.613374748766673) internal successors, (39552), 10946 states have internal predecessors, (39552), 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 16:39:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 39552 transitions. [2022-03-15 16:39:37,330 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 39552 transitions. Word has length 28 [2022-03-15 16:39:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:37,330 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 39552 transitions. [2022-03-15 16:39:37,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 39552 transitions. [2022-03-15 16:39:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:37,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:37,349 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, 1, 1] [2022-03-15 16:39:37,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 16:39:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 16:39:37,565 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash 715331910, now seen corresponding path program 80 times [2022-03-15 16:39:37,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:37,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654732644] [2022-03-15 16:39:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:37,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:37,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654732644] [2022-03-15 16:39:37,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654732644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:37,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794457389] [2022-03-15 16:39:37,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:37,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:37,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:37,765 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:37,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:39:37,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:39:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:37,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:38,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:39:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:38,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:38,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:39:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:38,728 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:39:38,729 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 63 treesize of output 88 [2022-03-15 16:39:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:39,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:39,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:39,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794457389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:39,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:39,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:39:39,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256949270] [2022-03-15 16:39:39,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:39:39,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:39:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:39:39,307 INFO L87 Difference]: Start difference. First operand 10947 states and 39552 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 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 16:39:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:40,336 INFO L93 Difference]: Finished difference Result 15320 states and 54028 transitions. [2022-03-15 16:39:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:39:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 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 16:39:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:40,376 INFO L225 Difference]: With dead ends: 15320 [2022-03-15 16:39:40,377 INFO L226 Difference]: Without dead ends: 15274 [2022-03-15 16:39:40,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:39:40,377 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:40,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 223 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 393 Invalid, 0 Unknown, 609 Unchecked, 0.3s Time] [2022-03-15 16:39:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15274 states. [2022-03-15 16:39:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15274 to 11320. [2022-03-15 16:39:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11319 states have (on average 3.610301263362488) internal successors, (40865), 11319 states have internal predecessors, (40865), 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 16:39:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 40865 transitions. [2022-03-15 16:39:40,598 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 40865 transitions. Word has length 28 [2022-03-15 16:39:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:40,598 INFO L470 AbstractCegarLoop]: Abstraction has 11320 states and 40865 transitions. [2022-03-15 16:39:40,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 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 16:39:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 40865 transitions. [2022-03-15 16:39:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:40,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:40,617 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, 1, 1] [2022-03-15 16:39:40,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:40,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 16:39:40,821 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash -260986934, now seen corresponding path program 81 times [2022-03-15 16:39:40,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:40,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439150709] [2022-03-15 16:39:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:41,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:41,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439150709] [2022-03-15 16:39:41,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439150709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:41,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869376116] [2022-03-15 16:39:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:41,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:41,061 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:41,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:39:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:41,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:39:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:41,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:41,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 52 [2022-03-15 16:39:41,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:41,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 93 [2022-03-15 16:39:41,624 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 63 treesize of output 53 [2022-03-15 16:39:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:41,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:42,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:42,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:39:42,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:42,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:42,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-03-15 16:39:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:42,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869376116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:42,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:42,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-15 16:39:42,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024054727] [2022-03-15 16:39:42,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:39:42,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:39:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:39:42,694 INFO L87 Difference]: Start difference. First operand 11320 states and 40865 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:45,127 INFO L93 Difference]: Finished difference Result 20879 states and 72924 transitions. [2022-03-15 16:39:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:39:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:45,180 INFO L225 Difference]: With dead ends: 20879 [2022-03-15 16:39:45,180 INFO L226 Difference]: Without dead ends: 20796 [2022-03-15 16:39:45,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=734, Invalid=6072, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:39:45,182 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 284 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:45,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 564 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 835 Invalid, 0 Unknown, 1580 Unchecked, 0.4s Time] [2022-03-15 16:39:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20796 states. [2022-03-15 16:39:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20796 to 11364. [2022-03-15 16:39:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.6121622810877407) internal successors, (41045), 11363 states have internal predecessors, (41045), 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 16:39:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 41045 transitions. [2022-03-15 16:39:45,470 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 41045 transitions. Word has length 28 [2022-03-15 16:39:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:45,470 INFO L470 AbstractCegarLoop]: Abstraction has 11364 states and 41045 transitions. [2022-03-15 16:39:45,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 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 16:39:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 41045 transitions. [2022-03-15 16:39:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:45,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:45,536 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, 1, 1] [2022-03-15 16:39:45,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:45,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:45,752 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1267822518, now seen corresponding path program 82 times [2022-03-15 16:39:45,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:45,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956634484] [2022-03-15 16:39:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:45,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956634484] [2022-03-15 16:39:45,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956634484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693836272] [2022-03-15 16:39:45,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:45,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:45,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:45,970 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:39:46,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:46,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:46,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:39:46,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-15 16:39:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:46,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:46,545 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:46,546 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 33 treesize of output 58 [2022-03-15 16:39:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:46,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:46,681 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:46,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:46,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:46,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693836272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:46,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:46,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:46,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886528498] [2022-03-15 16:39:46,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:46,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:46,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:46,789 INFO L87 Difference]: Start difference. First operand 11364 states and 41045 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:48,047 INFO L93 Difference]: Finished difference Result 16550 states and 58539 transitions. [2022-03-15 16:39:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:39:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:48,091 INFO L225 Difference]: With dead ends: 16550 [2022-03-15 16:39:48,091 INFO L226 Difference]: Without dead ends: 16496 [2022-03-15 16:39:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:39:48,091 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 130 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:48,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 220 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:39:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16496 states. [2022-03-15 16:39:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16496 to 11409. [2022-03-15 16:39:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 3.612201963534362) internal successors, (41208), 11408 states have internal predecessors, (41208), 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 16:39:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 41208 transitions. [2022-03-15 16:39:48,345 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 41208 transitions. Word has length 28 [2022-03-15 16:39:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:48,345 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 41208 transitions. [2022-03-15 16:39:48,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 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 16:39:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 41208 transitions. [2022-03-15 16:39:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:48,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:48,365 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, 1, 1] [2022-03-15 16:39:48,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:48,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:48,581 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:48,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1136858162, now seen corresponding path program 83 times [2022-03-15 16:39:48,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:48,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604630206] [2022-03-15 16:39:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:48,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:48,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604630206] [2022-03-15 16:39:48,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604630206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:48,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908312981] [2022-03-15 16:39:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:48,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:48,846 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:39:48,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:39:48,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:39:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:49,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:49,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:39:49,241 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 14 [2022-03-15 16:39:49,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-15 16:39:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:49,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:49,436 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:49,436 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 33 treesize of output 58 [2022-03-15 16:39:49,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:49,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:49,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:49,570 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:49,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:49,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:49,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:49,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:39:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908312981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:49,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:49,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:49,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033957892] [2022-03-15 16:39:49,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:49,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:49,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:49,693 INFO L87 Difference]: Start difference. First operand 11409 states and 41208 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:50,616 INFO L93 Difference]: Finished difference Result 15005 states and 53333 transitions. [2022-03-15 16:39:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:39:50,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:50,653 INFO L225 Difference]: With dead ends: 15005 [2022-03-15 16:39:50,653 INFO L226 Difference]: Without dead ends: 14990 [2022-03-15 16:39:50,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:39:50,653 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:50,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 265 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1136 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-03-15 16:39:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14990 states. [2022-03-15 16:39:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14990 to 11412. [2022-03-15 16:39:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11412 states, 11411 states have (on average 3.6137937078257822) internal successors, (41237), 11411 states have internal predecessors, (41237), 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 16:39:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11412 states to 11412 states and 41237 transitions. [2022-03-15 16:39:50,881 INFO L78 Accepts]: Start accepts. Automaton has 11412 states and 41237 transitions. Word has length 28 [2022-03-15 16:39:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 11412 states and 41237 transitions. [2022-03-15 16:39:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11412 states and 41237 transitions. [2022-03-15 16:39:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:50,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:50,900 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, 1, 1] [2022-03-15 16:39:50,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:39:51,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:51,116 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1670893074, now seen corresponding path program 84 times [2022-03-15 16:39:51,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:51,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100623768] [2022-03-15 16:39:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:51,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:51,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100623768] [2022-03-15 16:39:51,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100623768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:51,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375241522] [2022-03-15 16:39:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:51,357 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:51,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:39:51,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:39:51,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:51,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:51,673 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 26 treesize of output 22 [2022-03-15 16:39:51,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:39:51,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-15 16:39:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:51,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:51,933 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:51,933 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 34 treesize of output 59 [2022-03-15 16:39:51,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:51,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:52,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:52,063 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:52,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:52,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:39:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:52,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375241522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:52,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:52,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-15 16:39:52,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581222737] [2022-03-15 16:39:52,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:52,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:39:52,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:39:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:39:52,196 INFO L87 Difference]: Start difference. First operand 11412 states and 41237 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 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 16:39:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:52,609 INFO L93 Difference]: Finished difference Result 11607 states and 41785 transitions. [2022-03-15 16:39:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:39:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 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 16:39:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:52,637 INFO L225 Difference]: With dead ends: 11607 [2022-03-15 16:39:52,637 INFO L226 Difference]: Without dead ends: 11548 [2022-03-15 16:39:52,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:39:52,637 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:52,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 201 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 832 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-03-15 16:39:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11548 states. [2022-03-15 16:39:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11548 to 11432. [2022-03-15 16:39:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11432 states, 11431 states have (on average 3.6128072784533285) internal successors, (41298), 11431 states have internal predecessors, (41298), 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 16:39:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11432 states to 11432 states and 41298 transitions. [2022-03-15 16:39:52,838 INFO L78 Accepts]: Start accepts. Automaton has 11432 states and 41298 transitions. Word has length 28 [2022-03-15 16:39:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:52,838 INFO L470 AbstractCegarLoop]: Abstraction has 11432 states and 41298 transitions. [2022-03-15 16:39:52,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 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 16:39:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11432 states and 41298 transitions. [2022-03-15 16:39:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:52,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:52,857 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, 1, 1] [2022-03-15 16:39:52,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 16:39:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:53,068 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -683401462, now seen corresponding path program 85 times [2022-03-15 16:39:53,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:53,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007685698] [2022-03-15 16:39:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:53,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:53,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007685698] [2022-03-15 16:39:53,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007685698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:53,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958168990] [2022-03-15 16:39:53,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:53,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:53,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:53,274 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:53,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:39:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:53,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:39:53,558 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 31 treesize of output 27 [2022-03-15 16:39:53,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:39:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:53,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-15 16:39:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:53,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:53,831 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:53,831 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 34 treesize of output 59 [2022-03-15 16:39:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:53,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:53,957 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:53,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:54,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:54,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:54,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:39:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:54,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958168990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:54,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:54,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:54,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187663024] [2022-03-15 16:39:54,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:54,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:54,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:54,068 INFO L87 Difference]: Start difference. First operand 11432 states and 41298 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:54,499 INFO L93 Difference]: Finished difference Result 11602 states and 41770 transitions. [2022-03-15 16:39:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:39:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:54,526 INFO L225 Difference]: With dead ends: 11602 [2022-03-15 16:39:54,527 INFO L226 Difference]: Without dead ends: 11581 [2022-03-15 16:39:54,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:39:54,527 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:54,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 151 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11581 states. [2022-03-15 16:39:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11581 to 11435. [2022-03-15 16:39:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 11434 states have (on average 3.613258702116495) internal successors, (41314), 11434 states have internal predecessors, (41314), 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 16:39:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 41314 transitions. [2022-03-15 16:39:54,758 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 41314 transitions. Word has length 28 [2022-03-15 16:39:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 11435 states and 41314 transitions. [2022-03-15 16:39:54,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:39:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 41314 transitions. [2022-03-15 16:39:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:54,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:54,777 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, 1, 1] [2022-03-15 16:39:54,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:54,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:54,993 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1328510830, now seen corresponding path program 86 times [2022-03-15 16:39:54,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:54,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444756067] [2022-03-15 16:39:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:55,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:55,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444756067] [2022-03-15 16:39:55,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444756067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:55,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076337980] [2022-03-15 16:39:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:55,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:55,212 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:55,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:39:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:39:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:55,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:55,477 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 28 treesize of output 24 [2022-03-15 16:39:55,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:55,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:39:55,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:39:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:55,773 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:39:55,773 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 34 treesize of output 59 [2022-03-15 16:39:55,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:55,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:39:55,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,904 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:39:55,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:39:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:55,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:39:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:56,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076337980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:56,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:56,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:39:56,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769549773] [2022-03-15 16:39:56,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:56,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:56,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:56,029 INFO L87 Difference]: Start difference. First operand 11435 states and 41314 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:56,531 INFO L93 Difference]: Finished difference Result 11724 states and 42165 transitions. [2022-03-15 16:39:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:39:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:56,560 INFO L225 Difference]: With dead ends: 11724 [2022-03-15 16:39:56,560 INFO L226 Difference]: Without dead ends: 11709 [2022-03-15 16:39:56,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:39:56,560 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:56,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 230 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2022-03-15 16:39:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11466. [2022-03-15 16:39:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11466 states, 11465 states have (on average 3.6139555167902313) internal successors, (41434), 11465 states have internal predecessors, (41434), 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 16:39:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11466 states to 11466 states and 41434 transitions. [2022-03-15 16:39:56,762 INFO L78 Accepts]: Start accepts. Automaton has 11466 states and 41434 transitions. Word has length 28 [2022-03-15 16:39:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 11466 states and 41434 transitions. [2022-03-15 16:39:56,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:39:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11466 states and 41434 transitions. [2022-03-15 16:39:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:39:56,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:56,782 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, 1, 1] [2022-03-15 16:39:56,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 16:39:56,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 16:39:56,987 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1120177546, now seen corresponding path program 87 times [2022-03-15 16:39:56,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:56,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998612417] [2022-03-15 16:39:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:57,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:57,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998612417] [2022-03-15 16:39:57,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998612417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:57,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374542222] [2022-03-15 16:39:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:57,198 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:57,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:39:57,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:57,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 16:39:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:57,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:39:57,512 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 31 treesize of output 27 [2022-03-15 16:39:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:57,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:57,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-03-15 16:39:58,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:58,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 72 [2022-03-15 16:39:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:58,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:59,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:59,071 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2022-03-15 16:39:59,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:59,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:59,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:59,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-15 16:39:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:59,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374542222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:59,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:59,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 31 [2022-03-15 16:39:59,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104377981] [2022-03-15 16:39:59,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:59,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:59,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:59,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:59,313 INFO L87 Difference]: Start difference. First operand 11466 states and 41434 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 16:40:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:01,856 INFO L93 Difference]: Finished difference Result 19431 states and 68298 transitions. [2022-03-15 16:40:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:40:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 16:40:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:01,906 INFO L225 Difference]: With dead ends: 19431 [2022-03-15 16:40:01,906 INFO L226 Difference]: Without dead ends: 19417 [2022-03-15 16:40:01,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=669, Invalid=5651, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:40:01,907 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 216 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2699 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:01,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 647 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 807 Invalid, 0 Unknown, 2699 Unchecked, 0.3s Time] [2022-03-15 16:40:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19417 states. [2022-03-15 16:40:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19417 to 11508. [2022-03-15 16:40:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 3.613105066481272) internal successors, (41576), 11507 states have internal predecessors, (41576), 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 16:40:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 41576 transitions. [2022-03-15 16:40:02,174 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 41576 transitions. Word has length 28 [2022-03-15 16:40:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:02,174 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 41576 transitions. [2022-03-15 16:40:02,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 16:40:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 41576 transitions. [2022-03-15 16:40:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:02,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:02,194 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, 1, 1] [2022-03-15 16:40:02,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:02,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 16:40:02,409 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -908959978, now seen corresponding path program 88 times [2022-03-15 16:40:02,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:02,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506661961] [2022-03-15 16:40:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:02,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:02,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506661961] [2022-03-15 16:40:02,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506661961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:02,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812961090] [2022-03-15 16:40:02,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:40:02,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:02,605 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:02,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:40:02,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:40:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:02,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:02,840 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 24 treesize of output 20 [2022-03-15 16:40:02,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-15 16:40:02,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-15 16:40:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:03,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:03,098 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 33 treesize of output 58 [2022-03-15 16:40:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:03,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:03,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:03,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:03,300 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:03,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:03,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:03,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:03,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:03,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812961090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:03,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:03,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:03,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100436176] [2022-03-15 16:40:03,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:03,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:03,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:03,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:03,439 INFO L87 Difference]: Start difference. First operand 11508 states and 41576 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:04,894 INFO L93 Difference]: Finished difference Result 18248 states and 64138 transitions. [2022-03-15 16:40:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:40:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:04,939 INFO L225 Difference]: With dead ends: 18248 [2022-03-15 16:40:04,939 INFO L226 Difference]: Without dead ends: 18223 [2022-03-15 16:40:04,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:40:04,940 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:04,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 319 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:40:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18223 states. [2022-03-15 16:40:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18223 to 11481. [2022-03-15 16:40:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11481 states, 11480 states have (on average 3.6137630662020905) internal successors, (41486), 11480 states have internal predecessors, (41486), 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 16:40:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11481 states to 11481 states and 41486 transitions. [2022-03-15 16:40:05,197 INFO L78 Accepts]: Start accepts. Automaton has 11481 states and 41486 transitions. Word has length 28 [2022-03-15 16:40:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:05,197 INFO L470 AbstractCegarLoop]: Abstraction has 11481 states and 41486 transitions. [2022-03-15 16:40:05,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11481 states and 41486 transitions. [2022-03-15 16:40:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:05,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:05,217 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, 1, 1] [2022-03-15 16:40:05,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:05,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:05,418 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1021738998, now seen corresponding path program 89 times [2022-03-15 16:40:05,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:05,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748201671] [2022-03-15 16:40:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:05,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:05,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748201671] [2022-03-15 16:40:05,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748201671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:05,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598792648] [2022-03-15 16:40:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:05,629 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:05,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:40:05,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:40:05,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:05,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:05,904 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 31 treesize of output 27 [2022-03-15 16:40:05,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-15 16:40:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:06,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-15 16:40:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:06,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:06,220 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:06,220 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 34 treesize of output 59 [2022-03-15 16:40:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:06,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:06,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,344 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:06,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:06,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:06,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:40:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:06,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598792648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:06,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:06,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:06,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333687715] [2022-03-15 16:40:06,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:06,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:06,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:06,456 INFO L87 Difference]: Start difference. First operand 11481 states and 41486 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:07,010 INFO L93 Difference]: Finished difference Result 11772 states and 42335 transitions. [2022-03-15 16:40:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:40:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:07,040 INFO L225 Difference]: With dead ends: 11772 [2022-03-15 16:40:07,040 INFO L226 Difference]: Without dead ends: 11757 [2022-03-15 16:40:07,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:40:07,040 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:07,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:40:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2022-03-15 16:40:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11473. [2022-03-15 16:40:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11473 states, 11472 states have (on average 3.614539748953975) internal successors, (41466), 11472 states have internal predecessors, (41466), 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 16:40:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11473 states to 11473 states and 41466 transitions. [2022-03-15 16:40:07,280 INFO L78 Accepts]: Start accepts. Automaton has 11473 states and 41466 transitions. Word has length 28 [2022-03-15 16:40:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 11473 states and 41466 transitions. [2022-03-15 16:40:07,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 11473 states and 41466 transitions. [2022-03-15 16:40:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:07,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:07,300 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, 1, 1] [2022-03-15 16:40:07,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:07,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:07,515 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash 408275564, now seen corresponding path program 90 times [2022-03-15 16:40:07,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:07,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074192565] [2022-03-15 16:40:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:07,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:07,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:07,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074192565] [2022-03-15 16:40:07,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074192565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:07,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99529208] [2022-03-15 16:40:07,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:40:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:07,728 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:07,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:40:07,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:40:07,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:40:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:07,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:08,214 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 24 treesize of output 20 [2022-03-15 16:40:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:08,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:40:08,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:08,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2022-03-15 16:40:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:08,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:08,740 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:40:08,741 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 64 treesize of output 89 [2022-03-15 16:40:09,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:09,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:09,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:09,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:09,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:09,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-15 16:40:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:09,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99529208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:09,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:09,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:40:09,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394105600] [2022-03-15 16:40:09,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:09,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:40:09,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:40:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:40:09,164 INFO L87 Difference]: Start difference. First operand 11473 states and 41466 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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 16:40:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:16,412 INFO L93 Difference]: Finished difference Result 23033 states and 79142 transitions. [2022-03-15 16:40:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-15 16:40:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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 16:40:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:16,464 INFO L225 Difference]: With dead ends: 23033 [2022-03-15 16:40:16,465 INFO L226 Difference]: Without dead ends: 22882 [2022-03-15 16:40:16,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2097, Invalid=14933, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:40:16,465 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 407 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1715 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 555 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1682 Invalid, 0 Unknown, 1715 Unchecked, 0.9s Time] [2022-03-15 16:40:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22882 states. [2022-03-15 16:40:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22882 to 11855. [2022-03-15 16:40:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 3.615235363590349) internal successors, (42855), 11854 states have internal predecessors, (42855), 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 16:40:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 42855 transitions. [2022-03-15 16:40:16,738 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 42855 transitions. Word has length 28 [2022-03-15 16:40:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:16,738 INFO L470 AbstractCegarLoop]: Abstraction has 11855 states and 42855 transitions. [2022-03-15 16:40:16,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 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 16:40:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 42855 transitions. [2022-03-15 16:40:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:16,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:16,758 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, 1, 1] [2022-03-15 16:40:16,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:16,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:16,971 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -382716142, now seen corresponding path program 91 times [2022-03-15 16:40:16,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:16,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901384778] [2022-03-15 16:40:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:17,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:17,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901384778] [2022-03-15 16:40:17,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901384778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:17,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082038296] [2022-03-15 16:40:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:17,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:17,190 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:17,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:40:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:17,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:17,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:17,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:17,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:17,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:40:17,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:40:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:17,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:17,904 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:17,905 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 33 treesize of output 58 [2022-03-15 16:40:17,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:17,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:17,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:18,035 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:18,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:18,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:18,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:18,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:18,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082038296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:18,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:18,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:18,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076304881] [2022-03-15 16:40:18,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:18,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:18,163 INFO L87 Difference]: Start difference. First operand 11855 states and 42855 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:19,184 INFO L93 Difference]: Finished difference Result 15729 states and 55768 transitions. [2022-03-15 16:40:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:40:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:19,220 INFO L225 Difference]: With dead ends: 15729 [2022-03-15 16:40:19,220 INFO L226 Difference]: Without dead ends: 15687 [2022-03-15 16:40:19,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:40:19,220 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:19,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 334 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1007 Invalid, 0 Unknown, 248 Unchecked, 0.4s Time] [2022-03-15 16:40:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15687 states. [2022-03-15 16:40:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15687 to 11828. [2022-03-15 16:40:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11828 states, 11827 states have (on average 3.6177390716157944) internal successors, (42787), 11827 states have internal predecessors, (42787), 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 16:40:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11828 states to 11828 states and 42787 transitions. [2022-03-15 16:40:19,452 INFO L78 Accepts]: Start accepts. Automaton has 11828 states and 42787 transitions. Word has length 28 [2022-03-15 16:40:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 11828 states and 42787 transitions. [2022-03-15 16:40:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 11828 states and 42787 transitions. [2022-03-15 16:40:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:19,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:19,473 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, 1, 1] [2022-03-15 16:40:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 16:40:19,689 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -264943398, now seen corresponding path program 92 times [2022-03-15 16:40:19,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:19,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430711627] [2022-03-15 16:40:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:19,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:19,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430711627] [2022-03-15 16:40:19,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430711627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:19,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890623976] [2022-03-15 16:40:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:40:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:19,849 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:19,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:40:19,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:40:19,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:19,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:40:19,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:19,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:20,341 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 24 treesize of output 20 [2022-03-15 16:40:20,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:20,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-03-15 16:40:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2022-03-15 16:40:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:20,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:20,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:20,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 80 [2022-03-15 16:40:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:20,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:21,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890623976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:21,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:21,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-15 16:40:21,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609595559] [2022-03-15 16:40:21,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:21,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:40:21,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:40:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:40:21,003 INFO L87 Difference]: Start difference. First operand 11828 states and 42787 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:22,409 INFO L93 Difference]: Finished difference Result 17408 states and 61505 transitions. [2022-03-15 16:40:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:40:22,409 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:22,453 INFO L225 Difference]: With dead ends: 17408 [2022-03-15 16:40:22,453 INFO L226 Difference]: Without dead ends: 17370 [2022-03-15 16:40:22,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=2704, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:40:22,454 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 406 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 472 Invalid, 0 Unknown, 735 Unchecked, 0.2s Time] [2022-03-15 16:40:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17370 states. [2022-03-15 16:40:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17370 to 12017. [2022-03-15 16:40:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12016 states have (on average 3.6132656458055927) internal successors, (43417), 12016 states have internal predecessors, (43417), 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 16:40:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 43417 transitions. [2022-03-15 16:40:22,708 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 43417 transitions. Word has length 28 [2022-03-15 16:40:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:22,708 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 43417 transitions. [2022-03-15 16:40:22,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 43417 transitions. [2022-03-15 16:40:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:22,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:22,728 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, 1, 1] [2022-03-15 16:40:22,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:22,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 16:40:22,944 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -583789598, now seen corresponding path program 93 times [2022-03-15 16:40:22,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:22,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920018454] [2022-03-15 16:40:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:23,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:23,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920018454] [2022-03-15 16:40:23,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920018454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:23,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110719066] [2022-03-15 16:40:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:40:23,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:23,161 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:23,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:40:23,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:40:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:40:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:23,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:23,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:23,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-03-15 16:40:23,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:23,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 82 [2022-03-15 16:40:23,676 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 59 treesize of output 49 [2022-03-15 16:40:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:23,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:24,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:24,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 76 [2022-03-15 16:40:24,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:24,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:24,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 74 [2022-03-15 16:40:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:24,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110719066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:24,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:24,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-15 16:40:24,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4202745] [2022-03-15 16:40:24,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:24,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:40:24,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:40:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:40:24,566 INFO L87 Difference]: Start difference. First operand 12017 states and 43417 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:26,481 INFO L93 Difference]: Finished difference Result 17166 states and 59920 transitions. [2022-03-15 16:40:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:40:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:26,526 INFO L225 Difference]: With dead ends: 17166 [2022-03-15 16:40:26,526 INFO L226 Difference]: Without dead ends: 17105 [2022-03-15 16:40:26,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=496, Invalid=3664, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:40:26,527 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1410 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:26,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 434 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 750 Invalid, 0 Unknown, 1410 Unchecked, 0.4s Time] [2022-03-15 16:40:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17105 states. [2022-03-15 16:40:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17105 to 11963. [2022-03-15 16:40:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11963 states, 11962 states have (on average 3.6173716769770943) internal successors, (43271), 11962 states have internal predecessors, (43271), 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 16:40:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11963 states to 11963 states and 43271 transitions. [2022-03-15 16:40:26,789 INFO L78 Accepts]: Start accepts. Automaton has 11963 states and 43271 transitions. Word has length 28 [2022-03-15 16:40:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:26,789 INFO L470 AbstractCegarLoop]: Abstraction has 11963 states and 43271 transitions. [2022-03-15 16:40:26,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 16:40:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 11963 states and 43271 transitions. [2022-03-15 16:40:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:26,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:26,810 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, 1, 1] [2022-03-15 16:40:26,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:27,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 16:40:27,024 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -863494902, now seen corresponding path program 94 times [2022-03-15 16:40:27,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:27,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828614194] [2022-03-15 16:40:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:27,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:27,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828614194] [2022-03-15 16:40:27,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828614194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:27,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185297713] [2022-03-15 16:40:27,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:40:27,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:27,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:27,288 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:27,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:40:27,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:40:27,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:27,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:27,656 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 24 treesize of output 20 [2022-03-15 16:40:27,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-15 16:40:27,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-15 16:40:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:27,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:27,846 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:27,846 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 33 treesize of output 58 [2022-03-15 16:40:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:27,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:27,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,964 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:27,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:28,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:28,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185297713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:28,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:28,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:28,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222851425] [2022-03-15 16:40:28,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:28,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:28,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:28,079 INFO L87 Difference]: Start difference. First operand 11963 states and 43271 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 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 16:40:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:29,611 INFO L93 Difference]: Finished difference Result 13981 states and 49064 transitions. [2022-03-15 16:40:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:40:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 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 16:40:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:29,645 INFO L225 Difference]: With dead ends: 13981 [2022-03-15 16:40:29,645 INFO L226 Difference]: Without dead ends: 13951 [2022-03-15 16:40:29,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:40:29,645 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 171 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:29,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 420 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:40:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2022-03-15 16:40:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 12081. [2022-03-15 16:40:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12081 states, 12080 states have (on average 3.6149834437086095) internal successors, (43669), 12080 states have internal predecessors, (43669), 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 16:40:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12081 states to 12081 states and 43669 transitions. [2022-03-15 16:40:29,869 INFO L78 Accepts]: Start accepts. Automaton has 12081 states and 43669 transitions. Word has length 28 [2022-03-15 16:40:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:29,870 INFO L470 AbstractCegarLoop]: Abstraction has 12081 states and 43669 transitions. [2022-03-15 16:40:29,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 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 16:40:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 12081 states and 43669 transitions. [2022-03-15 16:40:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:29,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:29,889 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, 1, 1] [2022-03-15 16:40:29,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:40:30,105 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash -238835894, now seen corresponding path program 95 times [2022-03-15 16:40:30,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:30,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348877805] [2022-03-15 16:40:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:30,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:30,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348877805] [2022-03-15 16:40:30,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348877805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:30,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20830364] [2022-03-15 16:40:30,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:30,306 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:30,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:40:30,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:40:30,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:30,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:30,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 16:40:30,658 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 21 treesize of output 17 [2022-03-15 16:40:30,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-15 16:40:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:30,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:30,779 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:30,780 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 33 treesize of output 58 [2022-03-15 16:40:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:30,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:30,877 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:30,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:30,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:30,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:30,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:30,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20830364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:30,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:30,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:30,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200524220] [2022-03-15 16:40:30,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:30,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:30,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:30,990 INFO L87 Difference]: Start difference. First operand 12081 states and 43669 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:32,517 INFO L93 Difference]: Finished difference Result 13944 states and 48964 transitions. [2022-03-15 16:40:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:40:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:32,552 INFO L225 Difference]: With dead ends: 13944 [2022-03-15 16:40:32,552 INFO L226 Difference]: Without dead ends: 13839 [2022-03-15 16:40:32,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:40:32,553 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:32,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 499 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:40:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2022-03-15 16:40:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 12098. [2022-03-15 16:40:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12098 states, 12097 states have (on average 3.6147805240968833) internal successors, (43728), 12097 states have internal predecessors, (43728), 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 16:40:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12098 states to 12098 states and 43728 transitions. [2022-03-15 16:40:32,796 INFO L78 Accepts]: Start accepts. Automaton has 12098 states and 43728 transitions. Word has length 28 [2022-03-15 16:40:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:32,796 INFO L470 AbstractCegarLoop]: Abstraction has 12098 states and 43728 transitions. [2022-03-15 16:40:32,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:40:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 12098 states and 43728 transitions. [2022-03-15 16:40:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:32,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:32,816 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, 1, 1] [2022-03-15 16:40:32,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:33,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:33,031 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2027733386, now seen corresponding path program 96 times [2022-03-15 16:40:33,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:33,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773743055] [2022-03-15 16:40:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:33,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:33,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:33,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773743055] [2022-03-15 16:40:33,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773743055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:33,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136612813] [2022-03-15 16:40:33,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:40:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:33,224 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:33,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:40:33,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:40:33,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:40:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:33,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:33,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:40:33,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:33,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-15 16:40:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:33,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:34,125 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:34,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-03-15 16:40:34,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:34,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:34,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:40:34,267 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:40:34,267 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 45 treesize of output 70 [2022-03-15 16:40:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:34,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136612813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:34,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:34,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:40:34,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655817091] [2022-03-15 16:40:34,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:34,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:40:34,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:40:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:40:34,471 INFO L87 Difference]: Start difference. First operand 12098 states and 43728 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:40:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:37,932 INFO L93 Difference]: Finished difference Result 17935 states and 62573 transitions. [2022-03-15 16:40:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:40:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:40:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:37,980 INFO L225 Difference]: With dead ends: 17935 [2022-03-15 16:40:37,980 INFO L226 Difference]: Without dead ends: 17886 [2022-03-15 16:40:37,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=625, Invalid=4205, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:40:37,981 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:37,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 839 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:40:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17886 states. [2022-03-15 16:40:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17886 to 12447. [2022-03-15 16:40:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12446 states have (on average 3.611120038566608) internal successors, (44944), 12446 states have internal predecessors, (44944), 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 16:40:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 44944 transitions. [2022-03-15 16:40:38,314 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 44944 transitions. Word has length 28 [2022-03-15 16:40:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:38,315 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 44944 transitions. [2022-03-15 16:40:38,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 16:40:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 44944 transitions. [2022-03-15 16:40:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:38,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:38,339 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, 1, 1] [2022-03-15 16:40:38,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 16:40:38,555 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1545588618, now seen corresponding path program 97 times [2022-03-15 16:40:38,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:38,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404458423] [2022-03-15 16:40:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:38,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:38,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404458423] [2022-03-15 16:40:38,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404458423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:38,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705568245] [2022-03-15 16:40:38,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:38,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:38,819 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:38,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:40:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:39,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:39,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:40:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:40:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:39,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:39,475 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:39,475 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 33 treesize of output 58 [2022-03-15 16:40:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:39,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:39,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,597 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:39,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:39,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:39,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:39,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705568245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:39,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:39,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:39,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235784938] [2022-03-15 16:40:39,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:39,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:39,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:39,716 INFO L87 Difference]: Start difference. First operand 12447 states and 44944 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:40,339 INFO L93 Difference]: Finished difference Result 15454 states and 54900 transitions. [2022-03-15 16:40:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:40:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:40,380 INFO L225 Difference]: With dead ends: 15454 [2022-03-15 16:40:40,380 INFO L226 Difference]: Without dead ends: 15429 [2022-03-15 16:40:40,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:40:40,380 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:40,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 351 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 317 Unchecked, 0.3s Time] [2022-03-15 16:40:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15429 states. [2022-03-15 16:40:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15429 to 12476. [2022-03-15 16:40:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 12475 states have (on average 3.611062124248497) internal successors, (45048), 12475 states have internal predecessors, (45048), 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 16:40:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 45048 transitions. [2022-03-15 16:40:40,682 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 45048 transitions. Word has length 28 [2022-03-15 16:40:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:40,682 INFO L470 AbstractCegarLoop]: Abstraction has 12476 states and 45048 transitions. [2022-03-15 16:40:40,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 45048 transitions. [2022-03-15 16:40:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:40,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:40,706 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, 1, 1] [2022-03-15 16:40:40,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:40:40,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:40,907 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1788059100, now seen corresponding path program 98 times [2022-03-15 16:40:40,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:40,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5711294] [2022-03-15 16:40:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:40,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:41,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:41,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5711294] [2022-03-15 16:40:41,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5711294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:41,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291668468] [2022-03-15 16:40:41,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:40:41,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:41,117 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:41,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:40:41,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:40:41,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:41,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:41,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:40:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:41,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:40:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:41,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:41,624 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:41,625 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 33 treesize of output 58 [2022-03-15 16:40:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:41,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:41,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,697 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:41,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:41,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:41,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:41,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291668468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:41,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:41,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:41,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514274230] [2022-03-15 16:40:41,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:41,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:41,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:41,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:41,780 INFO L87 Difference]: Start difference. First operand 12476 states and 45048 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:42,323 INFO L93 Difference]: Finished difference Result 15674 states and 55504 transitions. [2022-03-15 16:40:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:40:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:42,361 INFO L225 Difference]: With dead ends: 15674 [2022-03-15 16:40:42,361 INFO L226 Difference]: Without dead ends: 15649 [2022-03-15 16:40:42,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:42,362 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:42,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 360 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 685 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-03-15 16:40:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15649 states. [2022-03-15 16:40:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15649 to 12525. [2022-03-15 16:40:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12525 states, 12524 states have (on average 3.6096295113382304) internal successors, (45207), 12524 states have internal predecessors, (45207), 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 16:40:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12525 states to 12525 states and 45207 transitions. [2022-03-15 16:40:42,695 INFO L78 Accepts]: Start accepts. Automaton has 12525 states and 45207 transitions. Word has length 28 [2022-03-15 16:40:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:42,695 INFO L470 AbstractCegarLoop]: Abstraction has 12525 states and 45207 transitions. [2022-03-15 16:40:42,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:40:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 12525 states and 45207 transitions. [2022-03-15 16:40:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:42,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:42,718 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, 1, 1] [2022-03-15 16:40:42,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:42,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:42,934 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 99553010, now seen corresponding path program 99 times [2022-03-15 16:40:42,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:42,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819832361] [2022-03-15 16:40:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:43,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:43,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819832361] [2022-03-15 16:40:43,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819832361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:43,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099751766] [2022-03-15 16:40:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:40:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:43,116 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:43,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:40:43,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:40:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:40:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:43,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:43,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:40:43,536 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 21 treesize of output 17 [2022-03-15 16:40:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-15 16:40:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:43,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:43,698 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:43,699 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 33 treesize of output 58 [2022-03-15 16:40:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:43,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,797 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:43,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:43,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:43,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099751766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:43,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:43,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:43,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986205878] [2022-03-15 16:40:43,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:43,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:43,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:43,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:43,963 INFO L87 Difference]: Start difference. First operand 12525 states and 45207 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:40:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:44,265 INFO L93 Difference]: Finished difference Result 12947 states and 46353 transitions. [2022-03-15 16:40:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:40:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:40:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:44,298 INFO L225 Difference]: With dead ends: 12947 [2022-03-15 16:40:44,298 INFO L226 Difference]: Without dead ends: 12944 [2022-03-15 16:40:44,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:40:44,299 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:44,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 426 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-03-15 16:40:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12944 states. [2022-03-15 16:40:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12944 to 12539. [2022-03-15 16:40:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12539 states, 12538 states have (on average 3.60894879566119) internal successors, (45249), 12538 states have internal predecessors, (45249), 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 16:40:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 45249 transitions. [2022-03-15 16:40:44,536 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 45249 transitions. Word has length 28 [2022-03-15 16:40:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:44,536 INFO L470 AbstractCegarLoop]: Abstraction has 12539 states and 45249 transitions. [2022-03-15 16:40:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:40:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 45249 transitions. [2022-03-15 16:40:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:44,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:44,560 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, 1, 1] [2022-03-15 16:40:44,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:44,775 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 96927234, now seen corresponding path program 100 times [2022-03-15 16:40:44,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:44,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035611969] [2022-03-15 16:40:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:44,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:45,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:45,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035611969] [2022-03-15 16:40:45,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035611969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:45,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177031495] [2022-03-15 16:40:45,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:40:45,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:45,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:45,116 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:45,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:40:45,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:40:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:45,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:45,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:40:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:40:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:45,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:45,770 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:45,770 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 33 treesize of output 58 [2022-03-15 16:40:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,871 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:45,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:45,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:45,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177031495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:45,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:45,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:45,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832029470] [2022-03-15 16:40:45,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:45,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:45,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:45,991 INFO L87 Difference]: Start difference. First operand 12539 states and 45249 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:40:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:46,673 INFO L93 Difference]: Finished difference Result 15585 states and 55320 transitions. [2022-03-15 16:40:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:40:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:40:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:46,711 INFO L225 Difference]: With dead ends: 15585 [2022-03-15 16:40:46,712 INFO L226 Difference]: Without dead ends: 15560 [2022-03-15 16:40:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:40:46,712 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:46,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 711 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-03-15 16:40:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2022-03-15 16:40:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 12533. [2022-03-15 16:40:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12533 states, 12532 states have (on average 3.608203000319183) internal successors, (45218), 12532 states have internal predecessors, (45218), 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 16:40:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12533 states to 12533 states and 45218 transitions. [2022-03-15 16:40:46,973 INFO L78 Accepts]: Start accepts. Automaton has 12533 states and 45218 transitions. Word has length 28 [2022-03-15 16:40:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 12533 states and 45218 transitions. [2022-03-15 16:40:46,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:40:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12533 states and 45218 transitions. [2022-03-15 16:40:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:46,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:46,996 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, 1, 1] [2022-03-15 16:40:47,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:47,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-15 16:40:47,211 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1446684146, now seen corresponding path program 101 times [2022-03-15 16:40:47,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:47,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722662977] [2022-03-15 16:40:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:47,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:47,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722662977] [2022-03-15 16:40:47,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722662977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:47,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764085453] [2022-03-15 16:40:47,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:47,421 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:47,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:40:47,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:40:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:47,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:47,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:40:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:47,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:40:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:47,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:47,913 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:47,913 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 33 treesize of output 58 [2022-03-15 16:40:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:47,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:47,997 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:47,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:48,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:48,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:48,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:48,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764085453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:48,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:48,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:40:48,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481970396] [2022-03-15 16:40:48,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:48,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:40:48,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:40:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:40:48,086 INFO L87 Difference]: Start difference. First operand 12533 states and 45218 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:48,584 INFO L93 Difference]: Finished difference Result 15484 states and 55042 transitions. [2022-03-15 16:40:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:40:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:48,625 INFO L225 Difference]: With dead ends: 15484 [2022-03-15 16:40:48,625 INFO L226 Difference]: Without dead ends: 15373 [2022-03-15 16:40:48,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:40:48,625 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:48,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 280 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 382 Unchecked, 0.2s Time] [2022-03-15 16:40:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15373 states. [2022-03-15 16:40:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15373 to 12642. [2022-03-15 16:40:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12642 states, 12641 states have (on average 3.6035914880151885) internal successors, (45553), 12641 states have internal predecessors, (45553), 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 16:40:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 45553 transitions. [2022-03-15 16:40:48,885 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 45553 transitions. Word has length 28 [2022-03-15 16:40:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:48,886 INFO L470 AbstractCegarLoop]: Abstraction has 12642 states and 45553 transitions. [2022-03-15 16:40:48,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:40:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 45553 transitions. [2022-03-15 16:40:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:48,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:48,910 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, 1, 1] [2022-03-15 16:40:48,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:49,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:49,126 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -378809582, now seen corresponding path program 102 times [2022-03-15 16:40:49,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:49,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287592858] [2022-03-15 16:40:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:49,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:49,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287592858] [2022-03-15 16:40:49,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287592858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:49,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958429] [2022-03-15 16:40:49,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:40:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:49,373 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:49,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:40:49,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:40:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:40:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:49,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:40:49,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:49,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:49,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-03-15 16:40:49,868 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 69 treesize of output 59 [2022-03-15 16:40:50,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:50,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 63 [2022-03-15 16:40:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:50,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:50,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:50,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:50,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-03-15 16:40:50,904 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:40:50,905 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 45 treesize of output 70 [2022-03-15 16:40:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:51,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:51,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:51,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-15 16:40:51,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168695848] [2022-03-15 16:40:51,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:51,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:40:51,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:40:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:40:51,100 INFO L87 Difference]: Start difference. First operand 12642 states and 45553 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 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 16:40:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:53,986 INFO L93 Difference]: Finished difference Result 21374 states and 74964 transitions. [2022-03-15 16:40:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:40:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 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 16:40:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:54,048 INFO L225 Difference]: With dead ends: 21374 [2022-03-15 16:40:54,048 INFO L226 Difference]: Without dead ends: 21344 [2022-03-15 16:40:54,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=751, Invalid=4799, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:40:54,049 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 282 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:54,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 517 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 886 Invalid, 0 Unknown, 1368 Unchecked, 0.4s Time] [2022-03-15 16:40:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21344 states. [2022-03-15 16:40:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21344 to 12660. [2022-03-15 16:40:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.602417252547595) internal successors, (45603), 12659 states have internal predecessors, (45603), 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 16:40:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45603 transitions. [2022-03-15 16:40:54,357 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45603 transitions. Word has length 28 [2022-03-15 16:40:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:54,357 INFO L470 AbstractCegarLoop]: Abstraction has 12660 states and 45603 transitions. [2022-03-15 16:40:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 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 16:40:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45603 transitions. [2022-03-15 16:40:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:54,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:54,380 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, 1, 1] [2022-03-15 16:40:54,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 16:40:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:54,596 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 714160914, now seen corresponding path program 103 times [2022-03-15 16:40:54,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:54,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110166316] [2022-03-15 16:40:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:54,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:54,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110166316] [2022-03-15 16:40:54,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110166316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:54,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973444488] [2022-03-15 16:40:54,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:54,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:54,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:54,847 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:54,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:40:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:55,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:55,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:40:55,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:40:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:55,273 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:55,273 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 33 treesize of output 58 [2022-03-15 16:40:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:55,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:40:55,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,340 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:55,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:40:55,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:55,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:55,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973444488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:55,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:55,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:55,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497357431] [2022-03-15 16:40:55,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:55,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:55,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:55,415 INFO L87 Difference]: Start difference. First operand 12660 states and 45603 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:56,019 INFO L93 Difference]: Finished difference Result 15695 states and 55675 transitions. [2022-03-15 16:40:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:40:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:56,057 INFO L225 Difference]: With dead ends: 15695 [2022-03-15 16:40:56,057 INFO L226 Difference]: Without dead ends: 15656 [2022-03-15 16:40:56,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:56,058 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:56,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1063 Invalid, 0 Unknown, 199 Unchecked, 0.4s Time] [2022-03-15 16:40:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15656 states. [2022-03-15 16:40:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15656 to 12707. [2022-03-15 16:40:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12707 states, 12706 states have (on average 3.6011333228396034) internal successors, (45756), 12706 states have internal predecessors, (45756), 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 16:40:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12707 states to 12707 states and 45756 transitions. [2022-03-15 16:40:56,296 INFO L78 Accepts]: Start accepts. Automaton has 12707 states and 45756 transitions. Word has length 28 [2022-03-15 16:40:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:56,296 INFO L470 AbstractCegarLoop]: Abstraction has 12707 states and 45756 transitions. [2022-03-15 16:40:56,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:40:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12707 states and 45756 transitions. [2022-03-15 16:40:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:56,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:56,318 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, 1, 1] [2022-03-15 16:40:56,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 16:40:56,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 16:40:56,534 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:56,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1286557074, now seen corresponding path program 104 times [2022-03-15 16:40:56,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:56,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764563816] [2022-03-15 16:40:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:56,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:56,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:56,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764563816] [2022-03-15 16:40:56,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764563816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:56,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691889898] [2022-03-15 16:40:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:40:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:56,762 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:56,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:40:56,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:40:56,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:40:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:57,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:57,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 16:40:57,132 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 14 [2022-03-15 16:40:57,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-15 16:40:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:57,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:57,350 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:57,350 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 33 treesize of output 58 [2022-03-15 16:40:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:57,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:57,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:40:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:57,450 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:57,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:40:57,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:57,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:57,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:40:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:57,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691889898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:57,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:57,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:40:57,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256655886] [2022-03-15 16:40:57,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:57,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:40:57,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:40:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:40:57,562 INFO L87 Difference]: Start difference. First operand 12707 states and 45756 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:40:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:58,026 INFO L93 Difference]: Finished difference Result 12916 states and 46277 transitions. [2022-03-15 16:40:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:40:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:40:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:58,126 INFO L225 Difference]: With dead ends: 12916 [2022-03-15 16:40:58,126 INFO L226 Difference]: Without dead ends: 12890 [2022-03-15 16:40:58,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:40:58,127 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 108 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:58,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 300 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 924 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-03-15 16:40:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2022-03-15 16:40:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12746. [2022-03-15 16:40:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12746 states, 12745 states have (on average 3.6000784621420165) internal successors, (45883), 12745 states have internal predecessors, (45883), 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 16:40:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12746 states to 12746 states and 45883 transitions. [2022-03-15 16:40:58,353 INFO L78 Accepts]: Start accepts. Automaton has 12746 states and 45883 transitions. Word has length 28 [2022-03-15 16:40:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 12746 states and 45883 transitions. [2022-03-15 16:40:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:40:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 12746 states and 45883 transitions. [2022-03-15 16:40:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:40:58,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:58,377 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, 1, 1] [2022-03-15 16:40:58,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:58,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 16:40:58,583 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash 846539570, now seen corresponding path program 105 times [2022-03-15 16:40:58,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:58,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204275894] [2022-03-15 16:40:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:58,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:58,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:58,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204275894] [2022-03-15 16:40:58,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204275894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:58,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062775829] [2022-03-15 16:40:58,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:40:58,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:58,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:58,823 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:58,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:40:58,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:40:58,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:58,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:40:58,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:59,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:40:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-03-15 16:40:59,199 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 26 treesize of output 18 [2022-03-15 16:40:59,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:59,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:59,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-03-15 16:40:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:59,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:59,873 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:40:59,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 81 [2022-03-15 16:41:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:00,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:00,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:00,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-15 16:41:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:00,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062775829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:00,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:00,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-15 16:41:00,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528953920] [2022-03-15 16:41:00,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:00,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:00,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:00,183 INFO L87 Difference]: Start difference. First operand 12746 states and 45883 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 16:41:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:03,864 INFO L93 Difference]: Finished difference Result 21962 states and 76540 transitions. [2022-03-15 16:41:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:41:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 16:41:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:03,924 INFO L225 Difference]: With dead ends: 21962 [2022-03-15 16:41:03,924 INFO L226 Difference]: Without dead ends: 21922 [2022-03-15 16:41:03,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=705, Invalid=5301, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:41:03,925 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 352 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2910 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:03,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 618 Invalid, 3739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2910 Invalid, 0 Unknown, 739 Unchecked, 1.3s Time] [2022-03-15 16:41:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21922 states. [2022-03-15 16:41:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21922 to 12766. [2022-03-15 16:41:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.5993732863298082) internal successors, (45946), 12765 states have internal predecessors, (45946), 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 16:41:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45946 transitions. [2022-03-15 16:41:04,262 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45946 transitions. Word has length 28 [2022-03-15 16:41:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:04,262 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45946 transitions. [2022-03-15 16:41:04,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 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 16:41:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45946 transitions. [2022-03-15 16:41:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:04,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:04,285 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, 1, 1] [2022-03-15 16:41:04,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:04,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 16:41:04,499 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1094093886, now seen corresponding path program 106 times [2022-03-15 16:41:04,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:04,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361702] [2022-03-15 16:41:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:04,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:04,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:04,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361702] [2022-03-15 16:41:04,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:04,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936650809] [2022-03-15 16:41:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:04,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:04,702 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:04,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:41:04,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:04,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:04,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:04,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-03-15 16:41:05,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-03-15 16:41:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:05,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:05,181 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:05,181 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 33 treesize of output 58 [2022-03-15 16:41:05,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:05,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:05,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:05,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:05,267 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:05,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:05,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:05,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:05,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:05,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936650809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:05,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:05,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:41:05,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140855933] [2022-03-15 16:41:05,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:05,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:41:05,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:41:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:05,392 INFO L87 Difference]: Start difference. First operand 12766 states and 45946 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 16:41:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:06,335 INFO L93 Difference]: Finished difference Result 15546 states and 55206 transitions. [2022-03-15 16:41:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:41:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 28 [2022-03-15 16:41:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:06,374 INFO L225 Difference]: With dead ends: 15546 [2022-03-15 16:41:06,375 INFO L226 Difference]: Without dead ends: 15536 [2022-03-15 16:41:06,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:06,375 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 300 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:41:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2022-03-15 16:41:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 12722. [2022-03-15 16:41:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12722 states, 12721 states have (on average 3.6019966983727696) internal successors, (45821), 12721 states have internal predecessors, (45821), 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 16:41:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12722 states to 12722 states and 45821 transitions. [2022-03-15 16:41:06,629 INFO L78 Accepts]: Start accepts. Automaton has 12722 states and 45821 transitions. Word has length 28 [2022-03-15 16:41:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 12722 states and 45821 transitions. [2022-03-15 16:41:06,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 16:41:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12722 states and 45821 transitions. [2022-03-15 16:41:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:06,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:06,654 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, 1, 1] [2022-03-15 16:41:06,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:06,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:06,870 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1390021678, now seen corresponding path program 107 times [2022-03-15 16:41:06,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:06,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678163858] [2022-03-15 16:41:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:06,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:07,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:07,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678163858] [2022-03-15 16:41:07,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678163858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:07,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226105804] [2022-03-15 16:41:07,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:07,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:07,129 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:07,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:41:07,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:41:07,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:07,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:07,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:41:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:07,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-03-15 16:41:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:07,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:07,836 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:07,837 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 33 treesize of output 58 [2022-03-15 16:41:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:07,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,930 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:07,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:07,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:08,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226105804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:08,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:08,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:08,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277838710] [2022-03-15 16:41:08,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:08,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:08,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:08,051 INFO L87 Difference]: Start difference. First operand 12722 states and 45821 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:08,659 INFO L93 Difference]: Finished difference Result 15516 states and 55159 transitions. [2022-03-15 16:41:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:41:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:08,696 INFO L225 Difference]: With dead ends: 15516 [2022-03-15 16:41:08,697 INFO L226 Difference]: Without dead ends: 15402 [2022-03-15 16:41:08,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:08,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:08,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 198 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 685 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-03-15 16:41:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15402 states. [2022-03-15 16:41:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15402 to 12766. [2022-03-15 16:41:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.599294947121034) internal successors, (45945), 12765 states have internal predecessors, (45945), 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 16:41:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45945 transitions. [2022-03-15 16:41:09,015 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45945 transitions. Word has length 28 [2022-03-15 16:41:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:09,015 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45945 transitions. [2022-03-15 16:41:09,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45945 transitions. [2022-03-15 16:41:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:09,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:09,038 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, 1, 1] [2022-03-15 16:41:09,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:09,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 16:41:09,254 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:09,254 INFO L85 PathProgramCache]: Analyzing trace with hash -261021852, now seen corresponding path program 108 times [2022-03-15 16:41:09,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:09,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29789665] [2022-03-15 16:41:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:09,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:09,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29789665] [2022-03-15 16:41:09,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29789665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:09,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597154804] [2022-03-15 16:41:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:09,483 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:41:09,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:41:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:09,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:09,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 16:41:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:41:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:09,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:10,072 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:10,072 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 33 treesize of output 58 [2022-03-15 16:41:10,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:10,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:10,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:10,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:10,176 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:10,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:10,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:10,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597154804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:10,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:10,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:10,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072961968] [2022-03-15 16:41:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:10,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:10,277 INFO L87 Difference]: Start difference. First operand 12766 states and 45945 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:10,640 INFO L93 Difference]: Finished difference Result 12892 states and 46275 transitions. [2022-03-15 16:41:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:41:10,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:10,676 INFO L225 Difference]: With dead ends: 12892 [2022-03-15 16:41:10,676 INFO L226 Difference]: Without dead ends: 12835 [2022-03-15 16:41:10,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:41:10,676 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:10,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 135 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 450 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-03-15 16:41:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-03-15 16:41:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12771. [2022-03-15 16:41:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 3.6) internal successors, (45972), 12770 states have internal predecessors, (45972), 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 16:41:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 45972 transitions. [2022-03-15 16:41:10,920 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 45972 transitions. Word has length 28 [2022-03-15 16:41:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:10,921 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 45972 transitions. [2022-03-15 16:41:10,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 45972 transitions. [2022-03-15 16:41:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:10,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:10,945 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, 1, 1] [2022-03-15 16:41:10,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-15 16:41:11,150 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 927005792, now seen corresponding path program 109 times [2022-03-15 16:41:11,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:11,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786806379] [2022-03-15 16:41:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:11,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:11,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786806379] [2022-03-15 16:41:11,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786806379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:11,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101753414] [2022-03-15 16:41:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:11,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:11,406 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:11,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:41:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:11,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:11,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:11,978 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 24 treesize of output 20 [2022-03-15 16:41:11,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:11,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:41:11,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:41:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:12,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:12,166 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:12,167 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 33 treesize of output 58 [2022-03-15 16:41:12,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:12,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:12,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,273 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:12,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:12,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:12,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101753414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:12,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:12,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:12,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678854007] [2022-03-15 16:41:12,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:12,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:12,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:12,392 INFO L87 Difference]: Start difference. First operand 12771 states and 45972 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:12,927 INFO L93 Difference]: Finished difference Result 15517 states and 55172 transitions. [2022-03-15 16:41:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:41:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:12,969 INFO L225 Difference]: With dead ends: 15517 [2022-03-15 16:41:12,969 INFO L226 Difference]: Without dead ends: 15390 [2022-03-15 16:41:12,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:12,970 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:12,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 175 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 624 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-03-15 16:41:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2022-03-15 16:41:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 12763. [2022-03-15 16:41:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12763 states, 12762 states have (on average 3.600376116596145) internal successors, (45948), 12762 states have internal predecessors, (45948), 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 16:41:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12763 states to 12763 states and 45948 transitions. [2022-03-15 16:41:13,218 INFO L78 Accepts]: Start accepts. Automaton has 12763 states and 45948 transitions. Word has length 28 [2022-03-15 16:41:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:13,218 INFO L470 AbstractCegarLoop]: Abstraction has 12763 states and 45948 transitions. [2022-03-15 16:41:13,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 12763 states and 45948 transitions. [2022-03-15 16:41:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:13,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:13,243 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, 1, 1] [2022-03-15 16:41:13,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:13,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 16:41:13,459 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 130437102, now seen corresponding path program 110 times [2022-03-15 16:41:13,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:13,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508594157] [2022-03-15 16:41:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:13,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:13,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508594157] [2022-03-15 16:41:13,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508594157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:13,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624304532] [2022-03-15 16:41:13,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:13,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:13,670 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:13,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:41:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:13,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:13,935 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 24 treesize of output 20 [2022-03-15 16:41:13,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-15 16:41:14,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:14,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:41:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:14,177 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:14,177 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 33 treesize of output 58 [2022-03-15 16:41:14,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:14,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,268 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:14,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:14,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:14,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624304532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:14,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:14,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:14,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334179358] [2022-03-15 16:41:14,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:14,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:14,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:14,366 INFO L87 Difference]: Start difference. First operand 12763 states and 45948 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 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 16:41:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:14,833 INFO L93 Difference]: Finished difference Result 13020 states and 46636 transitions. [2022-03-15 16:41:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:41:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 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 16:41:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:14,865 INFO L225 Difference]: With dead ends: 13020 [2022-03-15 16:41:14,865 INFO L226 Difference]: Without dead ends: 13005 [2022-03-15 16:41:14,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:14,865 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:14,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 228 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:41:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13005 states. [2022-03-15 16:41:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13005 to 12778. [2022-03-15 16:41:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 3.600219143773969) internal successors, (46000), 12777 states have internal predecessors, (46000), 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 16:41:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 46000 transitions. [2022-03-15 16:41:15,145 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 46000 transitions. Word has length 28 [2022-03-15 16:41:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:15,145 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 46000 transitions. [2022-03-15 16:41:15,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 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 16:41:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 46000 transitions. [2022-03-15 16:41:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:15,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:15,170 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, 1, 1] [2022-03-15 16:41:15,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 16:41:15,386 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1117928714, now seen corresponding path program 111 times [2022-03-15 16:41:15,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:15,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959345976] [2022-03-15 16:41:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:15,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:15,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:15,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959345976] [2022-03-15 16:41:15,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959345976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:15,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683006920] [2022-03-15 16:41:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:15,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:15,590 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:15,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:41:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:15,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 16:41:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:15,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:15,973 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 31 treesize of output 27 [2022-03-15 16:41:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:16,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:16,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2022-03-15 16:41:16,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:16,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 85 [2022-03-15 16:41:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:17,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:17,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:17,554 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 56 treesize of output 89 [2022-03-15 16:41:18,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:18,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:18,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:18,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 63 [2022-03-15 16:41:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:18,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683006920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:18,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:18,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-15 16:41:18,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038780871] [2022-03-15 16:41:18,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:41:18,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:41:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:41:18,403 INFO L87 Difference]: Start difference. First operand 12778 states and 46000 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 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 16:41:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:23,466 INFO L93 Difference]: Finished difference Result 24537 states and 86650 transitions. [2022-03-15 16:41:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:41:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 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 16:41:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:23,541 INFO L225 Difference]: With dead ends: 24537 [2022-03-15 16:41:23,541 INFO L226 Difference]: Without dead ends: 24488 [2022-03-15 16:41:23,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1193, Invalid=7737, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:41:23,542 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 302 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1883 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 479 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1537 Invalid, 0 Unknown, 1883 Unchecked, 0.7s Time] [2022-03-15 16:41:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24488 states. [2022-03-15 16:41:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24488 to 12960. [2022-03-15 16:41:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.6002777992129023) internal successors, (46656), 12959 states have internal predecessors, (46656), 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 16:41:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46656 transitions. [2022-03-15 16:41:23,955 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46656 transitions. Word has length 28 [2022-03-15 16:41:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:23,955 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46656 transitions. [2022-03-15 16:41:23,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 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 16:41:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46656 transitions. [2022-03-15 16:41:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:23,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:23,980 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, 1, 1] [2022-03-15 16:41:23,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:24,196 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1141828628, now seen corresponding path program 112 times [2022-03-15 16:41:24,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:24,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989547747] [2022-03-15 16:41:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:24,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989547747] [2022-03-15 16:41:24,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989547747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:24,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034373151] [2022-03-15 16:41:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:24,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:24,426 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:41:24,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:24,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:24,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:24,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:24,736 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 24 treesize of output 20 [2022-03-15 16:41:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:24,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:24,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-03-15 16:41:24,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:41:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:24,983 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:24,983 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 33 treesize of output 58 [2022-03-15 16:41:25,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:25,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:25,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:25,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:41:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:25,086 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:25,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:41:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:25,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:25,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:25,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034373151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:25,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:25,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:41:25,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193676260] [2022-03-15 16:41:25,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:41:25,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:41:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:25,210 INFO L87 Difference]: Start difference. First operand 12960 states and 46656 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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 16:41:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:25,624 INFO L93 Difference]: Finished difference Result 13228 states and 47355 transitions. [2022-03-15 16:41:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:41:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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 16:41:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:25,656 INFO L225 Difference]: With dead ends: 13228 [2022-03-15 16:41:25,656 INFO L226 Difference]: Without dead ends: 13203 [2022-03-15 16:41:25,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:41:25,657 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:25,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 168 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:41:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13203 states. [2022-03-15 16:41:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13203 to 12925. [2022-03-15 16:41:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12925 states, 12924 states have (on average 3.6012844320643764) internal successors, (46543), 12924 states have internal predecessors, (46543), 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 16:41:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12925 states to 12925 states and 46543 transitions. [2022-03-15 16:41:25,883 INFO L78 Accepts]: Start accepts. Automaton has 12925 states and 46543 transitions. Word has length 28 [2022-03-15 16:41:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:25,883 INFO L470 AbstractCegarLoop]: Abstraction has 12925 states and 46543 transitions. [2022-03-15 16:41:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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 16:41:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12925 states and 46543 transitions. [2022-03-15 16:41:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:25,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:25,909 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, 1, 1] [2022-03-15 16:41:25,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:26,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:26,125 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash 938600134, now seen corresponding path program 113 times [2022-03-15 16:41:26,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:26,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591353898] [2022-03-15 16:41:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:26,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:26,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591353898] [2022-03-15 16:41:26,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591353898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:26,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206073333] [2022-03-15 16:41:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:26,283 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:26,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 16:41:26,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:26,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:41:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:26,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:26,741 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 24 treesize of output 20 [2022-03-15 16:41:26,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:41:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-15 16:41:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:26,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:26,867 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:26,867 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 33 treesize of output 58 [2022-03-15 16:41:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:26,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,942 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:26,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:26,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:27,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206073333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:27,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:27,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:27,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439501502] [2022-03-15 16:41:27,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:27,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:27,025 INFO L87 Difference]: Start difference. First operand 12925 states and 46543 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:41:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:27,599 INFO L93 Difference]: Finished difference Result 16208 states and 57298 transitions. [2022-03-15 16:41:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:41:27,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:41:27,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:27,641 INFO L225 Difference]: With dead ends: 16208 [2022-03-15 16:41:27,641 INFO L226 Difference]: Without dead ends: 16183 [2022-03-15 16:41:27,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:27,641 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:27,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 343 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2022-03-15 16:41:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16183 states. [2022-03-15 16:41:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16183 to 12943. [2022-03-15 16:41:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 3.600216349868645) internal successors, (46594), 12942 states have internal predecessors, (46594), 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 16:41:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 46594 transitions. [2022-03-15 16:41:27,908 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 46594 transitions. Word has length 28 [2022-03-15 16:41:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:27,908 INFO L470 AbstractCegarLoop]: Abstraction has 12943 states and 46594 transitions. [2022-03-15 16:41:27,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:41:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 46594 transitions. [2022-03-15 16:41:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:27,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:27,933 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, 1, 1] [2022-03-15 16:41:27,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:28,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 16:41:28,149 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2009236406, now seen corresponding path program 114 times [2022-03-15 16:41:28,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:28,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940366106] [2022-03-15 16:41:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:28,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:28,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:28,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940366106] [2022-03-15 16:41:28,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940366106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:28,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469946468] [2022-03-15 16:41:28,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:28,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:28,306 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:28,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 16:41:28,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:28,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:28,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:28,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:41:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:28,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-03-15 16:41:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:28,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:28,903 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:28,903 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 33 treesize of output 58 [2022-03-15 16:41:28,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:28,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:28,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:28,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:29,007 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:29,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:29,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:29,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:29,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:29,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469946468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:29,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:29,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:29,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237441578] [2022-03-15 16:41:29,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:29,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:29,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:29,146 INFO L87 Difference]: Start difference. First operand 12943 states and 46594 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:41:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:29,997 INFO L93 Difference]: Finished difference Result 16199 states and 57265 transitions. [2022-03-15 16:41:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:41:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:41:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:30,037 INFO L225 Difference]: With dead ends: 16199 [2022-03-15 16:41:30,037 INFO L226 Difference]: Without dead ends: 16174 [2022-03-15 16:41:30,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:30,037 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:30,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 396 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 398 Unchecked, 0.4s Time] [2022-03-15 16:41:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2022-03-15 16:41:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 12970. [2022-03-15 16:41:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12969 states have (on average 3.597733055748323) internal successors, (46659), 12969 states have internal predecessors, (46659), 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 16:41:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 46659 transitions. [2022-03-15 16:41:30,288 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 46659 transitions. Word has length 28 [2022-03-15 16:41:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:30,288 INFO L470 AbstractCegarLoop]: Abstraction has 12970 states and 46659 transitions. [2022-03-15 16:41:30,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:41:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 46659 transitions. [2022-03-15 16:41:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:30,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:30,313 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, 1, 1] [2022-03-15 16:41:30,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:30,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 16:41:30,527 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1701544062, now seen corresponding path program 115 times [2022-03-15 16:41:30,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:30,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122114765] [2022-03-15 16:41:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:30,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:30,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122114765] [2022-03-15 16:41:30,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122114765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:30,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934580954] [2022-03-15 16:41:30,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:30,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:30,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:30,734 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:30,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 16:41:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:31,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:31,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 16:41:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:31,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:41:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:31,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:31,410 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:31,411 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 33 treesize of output 58 [2022-03-15 16:41:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:31,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:31,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,523 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:31,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:31,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:31,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:31,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934580954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:31,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:31,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:31,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849275965] [2022-03-15 16:41:31,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:31,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:31,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:31,651 INFO L87 Difference]: Start difference. First operand 12970 states and 46659 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:32,345 INFO L93 Difference]: Finished difference Result 16065 states and 56911 transitions. [2022-03-15 16:41:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:41:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:32,387 INFO L225 Difference]: With dead ends: 16065 [2022-03-15 16:41:32,387 INFO L226 Difference]: Without dead ends: 16056 [2022-03-15 16:41:32,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:32,388 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:32,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 371 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 732 Invalid, 0 Unknown, 363 Unchecked, 0.3s Time] [2022-03-15 16:41:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2022-03-15 16:41:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 12938. [2022-03-15 16:41:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.599907242791992) internal successors, (46572), 12937 states have internal predecessors, (46572), 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 16:41:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 46572 transitions. [2022-03-15 16:41:32,750 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 46572 transitions. Word has length 28 [2022-03-15 16:41:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:32,750 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 46572 transitions. [2022-03-15 16:41:32,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:41:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 46572 transitions. [2022-03-15 16:41:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:32,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:32,775 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, 1, 1] [2022-03-15 16:41:32,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 16:41:32,988 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 107172430, now seen corresponding path program 116 times [2022-03-15 16:41:32,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:32,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148411620] [2022-03-15 16:41:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:33,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:33,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148411620] [2022-03-15 16:41:33,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148411620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:33,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125878502] [2022-03-15 16:41:33,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:33,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:33,192 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:33,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 16:41:33,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:33,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:33,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:33,456 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 31 treesize of output 27 [2022-03-15 16:41:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-03-15 16:41:33,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:41:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:33,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:33,612 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:33,612 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 33 treesize of output 58 [2022-03-15 16:41:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:33,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:41:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,681 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:33,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:41:33,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:33,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:33,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125878502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:33,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:33,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:41:33,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442272752] [2022-03-15 16:41:33,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:41:33,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:41:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:33,760 INFO L87 Difference]: Start difference. First operand 12938 states and 46572 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:34,337 INFO L93 Difference]: Finished difference Result 15989 states and 56727 transitions. [2022-03-15 16:41:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:41:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:34,378 INFO L225 Difference]: With dead ends: 15989 [2022-03-15 16:41:34,379 INFO L226 Difference]: Without dead ends: 15964 [2022-03-15 16:41:34,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:34,379 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 297 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 825 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-03-15 16:41:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15964 states. [2022-03-15 16:41:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15964 to 12928. [2022-03-15 16:41:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12928 states, 12927 states have (on average 3.6002939583816818) internal successors, (46541), 12927 states have internal predecessors, (46541), 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 16:41:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12928 states to 12928 states and 46541 transitions. [2022-03-15 16:41:34,642 INFO L78 Accepts]: Start accepts. Automaton has 12928 states and 46541 transitions. Word has length 28 [2022-03-15 16:41:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:34,643 INFO L470 AbstractCegarLoop]: Abstraction has 12928 states and 46541 transitions. [2022-03-15 16:41:34,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 12928 states and 46541 transitions. [2022-03-15 16:41:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:34,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:34,667 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, 1, 1] [2022-03-15 16:41:34,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:34,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 16:41:34,880 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1755677898, now seen corresponding path program 117 times [2022-03-15 16:41:34,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:34,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703368495] [2022-03-15 16:41:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:35,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:35,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703368495] [2022-03-15 16:41:35,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703368495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:35,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037301717] [2022-03-15 16:41:35,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:35,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:35,112 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:35,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 16:41:35,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:35,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 16:41:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:35,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:35,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:35,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-03-15 16:41:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:35,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:35,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-15 16:41:35,668 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 27 treesize of output 23 [2022-03-15 16:41:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:35,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:36,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:36,149 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 20 [2022-03-15 16:41:36,155 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 15 treesize of output 9 [2022-03-15 16:41:36,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:36,180 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 17 [2022-03-15 16:41:36,185 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 12 treesize of output 5 [2022-03-15 16:41:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:36,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037301717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:36,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:36,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-03-15 16:41:36,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659232617] [2022-03-15 16:41:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:41:36,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:41:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:41:36,231 INFO L87 Difference]: Start difference. First operand 12928 states and 46541 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 16:41:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:39,170 INFO L93 Difference]: Finished difference Result 27708 states and 96022 transitions. [2022-03-15 16:41:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:41:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 16:41:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:39,252 INFO L225 Difference]: With dead ends: 27708 [2022-03-15 16:41:39,252 INFO L226 Difference]: Without dead ends: 27582 [2022-03-15 16:41:39,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1289, Invalid=8413, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:41:39,253 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 284 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:39,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 582 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1154 Invalid, 0 Unknown, 1294 Unchecked, 0.5s Time] [2022-03-15 16:41:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2022-03-15 16:41:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 12960. [2022-03-15 16:41:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.598888803148391) internal successors, (46638), 12959 states have internal predecessors, (46638), 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 16:41:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46638 transitions. [2022-03-15 16:41:39,651 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46638 transitions. Word has length 28 [2022-03-15 16:41:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46638 transitions. [2022-03-15 16:41:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 16:41:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46638 transitions. [2022-03-15 16:41:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:39,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:39,677 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, 1, 1] [2022-03-15 16:41:39,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 16:41:39,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 16:41:39,881 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1587868806, now seen corresponding path program 118 times [2022-03-15 16:41:39,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:39,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440595521] [2022-03-15 16:41:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:39,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:40,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:40,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440595521] [2022-03-15 16:41:40,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440595521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:40,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853654068] [2022-03-15 16:41:40,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:40,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:40,115 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:40,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 16:41:40,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:40,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:40,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:41:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:40,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-15 16:41:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:40,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:40,731 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:40,731 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 33 treesize of output 58 [2022-03-15 16:41:40,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:40,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:41:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,833 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:40,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:41:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:40,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:40,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853654068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:40,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:40,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:41:40,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281042350] [2022-03-15 16:41:40,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:40,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:41:40,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:41:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:40,963 INFO L87 Difference]: Start difference. First operand 12960 states and 46638 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:41,752 INFO L93 Difference]: Finished difference Result 16858 states and 59788 transitions. [2022-03-15 16:41:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:41:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:41,797 INFO L225 Difference]: With dead ends: 16858 [2022-03-15 16:41:41,797 INFO L226 Difference]: Without dead ends: 16772 [2022-03-15 16:41:41,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:41:41,797 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:41,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 180 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 663 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-03-15 16:41:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16772 states. [2022-03-15 16:41:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16772 to 12965. [2022-03-15 16:41:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.5990435050910214) internal successors, (46658), 12964 states have internal predecessors, (46658), 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 16:41:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 46658 transitions. [2022-03-15 16:41:42,108 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 46658 transitions. Word has length 28 [2022-03-15 16:41:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:42,108 INFO L470 AbstractCegarLoop]: Abstraction has 12965 states and 46658 transitions. [2022-03-15 16:41:42,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 46658 transitions. [2022-03-15 16:41:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:42,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:42,132 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, 1, 1] [2022-03-15 16:41:42,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:42,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-15 16:41:42,347 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1332985644, now seen corresponding path program 119 times [2022-03-15 16:41:42,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:42,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222282871] [2022-03-15 16:41:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:42,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:42,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:42,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222282871] [2022-03-15 16:41:42,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222282871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:42,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556657301] [2022-03-15 16:41:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:42,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:42,543 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 16:41:42,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:42,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:41:43,028 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 24 treesize of output 20 [2022-03-15 16:41:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:41:43,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-15 16:41:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:43,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:43,213 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:43,213 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 33 treesize of output 58 [2022-03-15 16:41:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:43,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:41:43,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,332 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:43,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:41:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:43,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:43,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556657301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:43,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:43,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:41:43,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495954736] [2022-03-15 16:41:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:41:43,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:41:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:41:43,452 INFO L87 Difference]: Start difference. First operand 12965 states and 46658 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:43,945 INFO L93 Difference]: Finished difference Result 15799 states and 56125 transitions. [2022-03-15 16:41:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:41:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:43,987 INFO L225 Difference]: With dead ends: 15799 [2022-03-15 16:41:43,987 INFO L226 Difference]: Without dead ends: 15665 [2022-03-15 16:41:43,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:43,988 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:43,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 157 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-03-15 16:41:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15665 states. [2022-03-15 16:41:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15665 to 12889. [2022-03-15 16:41:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12889 states, 12888 states have (on average 3.6007914338919926) internal successors, (46407), 12888 states have internal predecessors, (46407), 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 16:41:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12889 states to 12889 states and 46407 transitions. [2022-03-15 16:41:44,256 INFO L78 Accepts]: Start accepts. Automaton has 12889 states and 46407 transitions. Word has length 28 [2022-03-15 16:41:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 12889 states and 46407 transitions. [2022-03-15 16:41:44,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 16:41:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12889 states and 46407 transitions. [2022-03-15 16:41:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:44,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:44,281 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, 1, 1] [2022-03-15 16:41:44,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:44,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:44,495 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash 177393772, now seen corresponding path program 120 times [2022-03-15 16:41:44,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:44,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617122944] [2022-03-15 16:41:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617122944] [2022-03-15 16:41:44,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617122944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568062530] [2022-03-15 16:41:44,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:44,757 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:44,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 16:41:44,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:41:44,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:41:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:45,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:45,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:45,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:45,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-03-15 16:41:45,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:45,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 80 [2022-03-15 16:41:45,322 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 62 treesize of output 52 [2022-03-15 16:41:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:45,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:45,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:45,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:45,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-03-15 16:41:46,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:46,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:46,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:41:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:46,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568062530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:46,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:46,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:41:46,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657079243] [2022-03-15 16:41:46,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:46,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:41:46,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:41:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:41:46,442 INFO L87 Difference]: Start difference. First operand 12889 states and 46407 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:41:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:49,630 INFO L93 Difference]: Finished difference Result 20867 states and 72987 transitions. [2022-03-15 16:41:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:41:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:41:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:49,684 INFO L225 Difference]: With dead ends: 20867 [2022-03-15 16:41:49,684 INFO L226 Difference]: Without dead ends: 20781 [2022-03-15 16:41:49,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=791, Invalid=6015, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:41:49,685 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2286 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:49,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 448 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 816 Invalid, 0 Unknown, 2286 Unchecked, 0.4s Time] [2022-03-15 16:41:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-03-15 16:41:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 13053. [2022-03-15 16:41:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13053 states, 13052 states have (on average 3.5927827152926755) internal successors, (46893), 13052 states have internal predecessors, (46893), 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 16:41:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13053 states to 13053 states and 46893 transitions. [2022-03-15 16:41:50,023 INFO L78 Accepts]: Start accepts. Automaton has 13053 states and 46893 transitions. Word has length 28 [2022-03-15 16:41:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:50,023 INFO L470 AbstractCegarLoop]: Abstraction has 13053 states and 46893 transitions. [2022-03-15 16:41:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:41:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13053 states and 46893 transitions. [2022-03-15 16:41:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:50,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:50,047 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, 1, 1] [2022-03-15 16:41:50,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 16:41:50,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:50,262 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1021488582, now seen corresponding path program 121 times [2022-03-15 16:41:50,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:50,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816960498] [2022-03-15 16:41:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:50,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:50,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816960498] [2022-03-15 16:41:50,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816960498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:50,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888611503] [2022-03-15 16:41:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:50,465 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:50,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 16:41:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:41:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:50,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 16:41:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:50,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:50,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-03-15 16:41:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:50,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:50,965 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:50,965 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 33 treesize of output 58 [2022-03-15 16:41:51,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:51,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:41:51,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,068 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:41:51,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:41:51,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:51,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:51,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888611503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:51,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:51,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:41:51,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75656418] [2022-03-15 16:41:51,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:51,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:41:51,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:41:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:41:51,185 INFO L87 Difference]: Start difference. First operand 13053 states and 46893 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:51,630 INFO L93 Difference]: Finished difference Result 17382 states and 61295 transitions. [2022-03-15 16:41:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:41:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:51,676 INFO L225 Difference]: With dead ends: 17382 [2022-03-15 16:41:51,676 INFO L226 Difference]: Without dead ends: 17339 [2022-03-15 16:41:51,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:51,677 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:51,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 214 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-15 16:41:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-03-15 16:41:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 13148. [2022-03-15 16:41:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 13147 states have (on average 3.5892599072031643) internal successors, (47188), 13147 states have internal predecessors, (47188), 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 16:41:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 47188 transitions. [2022-03-15 16:41:51,957 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 47188 transitions. Word has length 28 [2022-03-15 16:41:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:51,958 INFO L470 AbstractCegarLoop]: Abstraction has 13148 states and 47188 transitions. [2022-03-15 16:41:51,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:41:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 47188 transitions. [2022-03-15 16:41:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:51,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:51,983 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, 1, 1] [2022-03-15 16:41:51,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:52,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:52,199 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1270364268, now seen corresponding path program 122 times [2022-03-15 16:41:52,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:52,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309382769] [2022-03-15 16:41:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:52,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:52,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309382769] [2022-03-15 16:41:52,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309382769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:52,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441001011] [2022-03-15 16:41:52,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:52,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:52,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:52,468 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 16:41:52,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:41:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:52,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:52,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:52,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-03-15 16:41:53,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:53,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 85 [2022-03-15 16:41:53,009 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 59 treesize of output 49 [2022-03-15 16:41:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:53,515 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:41:53,515 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 60 treesize of output 85 [2022-03-15 16:41:53,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:53,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:53,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:53,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:41:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:54,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441001011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:54,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:54,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:41:54,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135403033] [2022-03-15 16:41:54,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:54,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:41:54,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:41:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:41:54,250 INFO L87 Difference]: Start difference. First operand 13148 states and 47188 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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 16:41:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:56,106 INFO L93 Difference]: Finished difference Result 21637 states and 75420 transitions. [2022-03-15 16:41:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:41:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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 16:41:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:56,162 INFO L225 Difference]: With dead ends: 21637 [2022-03-15 16:41:56,162 INFO L226 Difference]: Without dead ends: 21492 [2022-03-15 16:41:56,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:41:56,162 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 987 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:56,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 426 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 911 Invalid, 0 Unknown, 987 Unchecked, 0.4s Time] [2022-03-15 16:41:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21492 states. [2022-03-15 16:41:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21492 to 13298. [2022-03-15 16:41:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13298 states, 13297 states have (on average 3.590584342332857) internal successors, (47744), 13297 states have internal predecessors, (47744), 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 16:41:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13298 states to 13298 states and 47744 transitions. [2022-03-15 16:41:56,533 INFO L78 Accepts]: Start accepts. Automaton has 13298 states and 47744 transitions. Word has length 28 [2022-03-15 16:41:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 13298 states and 47744 transitions. [2022-03-15 16:41:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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 16:41:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 13298 states and 47744 transitions. [2022-03-15 16:41:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:41:56,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:56,559 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, 1, 1] [2022-03-15 16:41:56,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 16:41:56,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:56,760 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1836575384, now seen corresponding path program 123 times [2022-03-15 16:41:56,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:56,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125535679] [2022-03-15 16:41:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:56,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:56,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125535679] [2022-03-15 16:41:56,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125535679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:56,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409620165] [2022-03-15 16:41:56,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:56,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:56,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:56,965 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:56,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 16:41:57,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:41:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:57,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:41:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:57,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:41:57,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:57,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:57,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2022-03-15 16:41:57,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:57,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 84 [2022-03-15 16:41:57,590 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 64 treesize of output 54 [2022-03-15 16:41:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:58,244 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:41:58,244 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 60 treesize of output 85 [2022-03-15 16:41:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:58,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-03-15 16:41:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:58,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409620165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:58,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:58,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 16:41:58,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803715869] [2022-03-15 16:41:58,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:58,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:41:58,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:41:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:41:58,769 INFO L87 Difference]: Start difference. First operand 13298 states and 47744 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:42:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:03,071 INFO L93 Difference]: Finished difference Result 29160 states and 100540 transitions. [2022-03-15 16:42:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 16:42:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:42:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:03,162 INFO L225 Difference]: With dead ends: 29160 [2022-03-15 16:42:03,162 INFO L226 Difference]: Without dead ends: 29001 [2022-03-15 16:42:03,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:42:03,163 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 257 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1515 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:03,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 655 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1681 Invalid, 0 Unknown, 1515 Unchecked, 0.9s Time] [2022-03-15 16:42:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29001 states. [2022-03-15 16:42:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29001 to 13334. [2022-03-15 16:42:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13334 states, 13333 states have (on average 3.59063976599415) internal successors, (47874), 13333 states have internal predecessors, (47874), 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 16:42:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13334 states to 13334 states and 47874 transitions. [2022-03-15 16:42:03,558 INFO L78 Accepts]: Start accepts. Automaton has 13334 states and 47874 transitions. Word has length 28 [2022-03-15 16:42:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 13334 states and 47874 transitions. [2022-03-15 16:42:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 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 16:42:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13334 states and 47874 transitions. [2022-03-15 16:42:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:03,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:03,584 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, 1, 1] [2022-03-15 16:42:03,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:03,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-15 16:42:03,792 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:03,792 INFO L85 PathProgramCache]: Analyzing trace with hash -195901830, now seen corresponding path program 124 times [2022-03-15 16:42:03,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:03,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677752301] [2022-03-15 16:42:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:03,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:04,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:04,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677752301] [2022-03-15 16:42:04,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677752301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:04,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102749222] [2022-03-15 16:42:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:04,034 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:04,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 16:42:04,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:04,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:04,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:42:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:04,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-15 16:42:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:04,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:04,479 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:04,479 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 33 treesize of output 58 [2022-03-15 16:42:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:04,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-15 16:42:04,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,560 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:04,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:04,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:04,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102749222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:04,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:04,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:04,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207614403] [2022-03-15 16:42:04,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:04,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:04,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:04,646 INFO L87 Difference]: Start difference. First operand 13334 states and 47874 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:05,347 INFO L93 Difference]: Finished difference Result 17565 states and 61968 transitions. [2022-03-15 16:42:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:42:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:05,393 INFO L225 Difference]: With dead ends: 17565 [2022-03-15 16:42:05,393 INFO L226 Difference]: Without dead ends: 17496 [2022-03-15 16:42:05,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:42:05,394 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:05,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 671 Invalid, 0 Unknown, 518 Unchecked, 0.3s Time] [2022-03-15 16:42:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17496 states. [2022-03-15 16:42:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17496 to 13197. [2022-03-15 16:42:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13197 states, 13196 states have (on average 3.5944225522885724) internal successors, (47432), 13196 states have internal predecessors, (47432), 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 16:42:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13197 states to 13197 states and 47432 transitions. [2022-03-15 16:42:05,666 INFO L78 Accepts]: Start accepts. Automaton has 13197 states and 47432 transitions. Word has length 28 [2022-03-15 16:42:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:05,666 INFO L470 AbstractCegarLoop]: Abstraction has 13197 states and 47432 transitions. [2022-03-15 16:42:05,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 13197 states and 47432 transitions. [2022-03-15 16:42:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:05,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:05,690 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, 1, 1] [2022-03-15 16:42:05,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:05,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 16:42:05,906 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1874669942, now seen corresponding path program 125 times [2022-03-15 16:42:05,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:05,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325154676] [2022-03-15 16:42:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:06,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:06,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325154676] [2022-03-15 16:42:06,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325154676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:06,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807946262] [2022-03-15 16:42:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:06,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:06,120 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:06,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 16:42:06,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:06,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:06,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 16:42:06,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:06,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:06,545 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 24 treesize of output 20 [2022-03-15 16:42:06,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:06,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:42:06,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:06,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:06,689 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 30 treesize of output 55 [2022-03-15 16:42:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:06,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,804 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:06,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:06,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:06,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:06,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807946262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:06,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:06,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:06,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940124722] [2022-03-15 16:42:06,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:06,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:06,914 INFO L87 Difference]: Start difference. First operand 13197 states and 47432 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:07,444 INFO L93 Difference]: Finished difference Result 16308 states and 57849 transitions. [2022-03-15 16:42:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:42:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:07,484 INFO L225 Difference]: With dead ends: 16308 [2022-03-15 16:42:07,484 INFO L226 Difference]: Without dead ends: 16293 [2022-03-15 16:42:07,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:42:07,485 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 69 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:07,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 285 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 707 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-15 16:42:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2022-03-15 16:42:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 13256. [2022-03-15 16:42:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13255 states have (on average 3.593511882308563) internal successors, (47632), 13255 states have internal predecessors, (47632), 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 16:42:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 47632 transitions. [2022-03-15 16:42:07,801 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 47632 transitions. Word has length 28 [2022-03-15 16:42:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:07,801 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 47632 transitions. [2022-03-15 16:42:07,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 47632 transitions. [2022-03-15 16:42:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:07,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:07,825 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, 1, 1] [2022-03-15 16:42:07,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 16:42:08,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:08,026 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -527539186, now seen corresponding path program 126 times [2022-03-15 16:42:08,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:08,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899311921] [2022-03-15 16:42:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:08,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:08,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899311921] [2022-03-15 16:42:08,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899311921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:08,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710869819] [2022-03-15 16:42:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:08,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:08,214 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:08,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 16:42:08,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:08,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:08,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 16:42:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:42:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:08,686 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:08,686 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 30 treesize of output 55 [2022-03-15 16:42:08,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:08,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,784 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:08,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:08,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:08,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:08,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710869819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:08,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:08,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:08,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100491144] [2022-03-15 16:42:08,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:08,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:08,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:08,870 INFO L87 Difference]: Start difference. First operand 13256 states and 47632 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:09,304 INFO L93 Difference]: Finished difference Result 16326 states and 57916 transitions. [2022-03-15 16:42:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:09,347 INFO L225 Difference]: With dead ends: 16326 [2022-03-15 16:42:09,347 INFO L226 Difference]: Without dead ends: 16311 [2022-03-15 16:42:09,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:42:09,348 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:09,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 272 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 691 Invalid, 0 Unknown, 342 Unchecked, 0.2s Time] [2022-03-15 16:42:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2022-03-15 16:42:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 13234. [2022-03-15 16:42:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 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 16:42:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-03-15 16:42:09,621 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-03-15 16:42:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:09,621 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-03-15 16:42:09,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-03-15 16:42:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:09,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:09,647 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, 1, 1] [2022-03-15 16:42:09,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-15 16:42:09,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 16:42:09,851 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash 896549742, now seen corresponding path program 127 times [2022-03-15 16:42:09,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:09,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650485220] [2022-03-15 16:42:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:09,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:10,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:10,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650485220] [2022-03-15 16:42:10,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650485220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:10,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681375203] [2022-03-15 16:42:10,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:10,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:10,012 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:10,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 16:42:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:10,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:10,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 16:42:10,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-03-15 16:42:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:10,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:10,577 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:10,578 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 30 treesize of output 55 [2022-03-15 16:42:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:10,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,689 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:10,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:10,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:10,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681375203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:10,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:10,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:10,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508377806] [2022-03-15 16:42:10,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:10,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:10,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:10,783 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:11,173 INFO L93 Difference]: Finished difference Result 16304 states and 57804 transitions. [2022-03-15 16:42:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:11,216 INFO L225 Difference]: With dead ends: 16304 [2022-03-15 16:42:11,216 INFO L226 Difference]: Without dead ends: 16289 [2022-03-15 16:42:11,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:42:11,216 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:11,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 261 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 407 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-03-15 16:42:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16289 states. [2022-03-15 16:42:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16289 to 13260. [2022-03-15 16:42:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13259 states have (on average 3.5910702164567465) internal successors, (47614), 13259 states have internal predecessors, (47614), 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 16:42:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 47614 transitions. [2022-03-15 16:42:11,494 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 47614 transitions. Word has length 28 [2022-03-15 16:42:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:11,494 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 47614 transitions. [2022-03-15 16:42:11,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 16:42:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 47614 transitions. [2022-03-15 16:42:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:11,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:11,520 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, 1, 1] [2022-03-15 16:42:11,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 16:42:11,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 16:42:11,727 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2051286798, now seen corresponding path program 128 times [2022-03-15 16:42:11,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:11,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125609613] [2022-03-15 16:42:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:11,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:11,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125609613] [2022-03-15 16:42:11,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125609613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:11,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208057847] [2022-03-15 16:42:11,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:11,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:11,967 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:11,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 16:42:12,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:12,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:12,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:12,417 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 24 treesize of output 20 [2022-03-15 16:42:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:12,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:42:12,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:12,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:12,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:12,564 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 30 treesize of output 55 [2022-03-15 16:42:12,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:12,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:12,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,690 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:12,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:12,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:12,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:12,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208057847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:12,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:12,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:12,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969156053] [2022-03-15 16:42:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:12,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:12,793 INFO L87 Difference]: Start difference. First operand 13260 states and 47614 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:13,364 INFO L93 Difference]: Finished difference Result 16450 states and 58205 transitions. [2022-03-15 16:42:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:42:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:13,412 INFO L225 Difference]: With dead ends: 16450 [2022-03-15 16:42:13,413 INFO L226 Difference]: Without dead ends: 16435 [2022-03-15 16:42:13,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:42:13,424 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:13,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 276 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 762 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-03-15 16:42:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16435 states. [2022-03-15 16:42:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16435 to 13282. [2022-03-15 16:42:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 3.5894134477825466) internal successors, (47671), 13281 states have internal predecessors, (47671), 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 16:42:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 47671 transitions. [2022-03-15 16:42:13,774 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 47671 transitions. Word has length 28 [2022-03-15 16:42:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:13,776 INFO L470 AbstractCegarLoop]: Abstraction has 13282 states and 47671 transitions. [2022-03-15 16:42:13,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 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 16:42:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 47671 transitions. [2022-03-15 16:42:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:13,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:13,810 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, 1, 1] [2022-03-15 16:42:13,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:14,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:14,019 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1354025700, now seen corresponding path program 129 times [2022-03-15 16:42:14,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614277707] [2022-03-15 16:42:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614277707] [2022-03-15 16:42:14,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614277707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:14,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798496148] [2022-03-15 16:42:14,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:14,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:14,193 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:14,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 16:42:14,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:42:14,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:14,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:14,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:42:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:42:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:14,739 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:14,739 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 30 treesize of output 55 [2022-03-15 16:42:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:14,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:14,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,856 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:14,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:14,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798496148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:14,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:14,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:14,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031024602] [2022-03-15 16:42:14,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:14,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:14,972 INFO L87 Difference]: Start difference. First operand 13282 states and 47671 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:15,497 INFO L93 Difference]: Finished difference Result 16320 states and 57838 transitions. [2022-03-15 16:42:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:15,541 INFO L225 Difference]: With dead ends: 16320 [2022-03-15 16:42:15,542 INFO L226 Difference]: Without dead ends: 16313 [2022-03-15 16:42:15,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:42:15,542 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:15,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 228 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 563 Invalid, 0 Unknown, 367 Unchecked, 0.3s Time] [2022-03-15 16:42:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2022-03-15 16:42:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 13234. [2022-03-15 16:42:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 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 16:42:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-03-15 16:42:15,918 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-03-15 16:42:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:15,918 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-03-15 16:42:15,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-03-15 16:42:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:15,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:15,943 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, 1, 1] [2022-03-15 16:42:15,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:16,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:16,159 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash -571975410, now seen corresponding path program 130 times [2022-03-15 16:42:16,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:16,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367697698] [2022-03-15 16:42:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:16,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367697698] [2022-03-15 16:42:16,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367697698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:16,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645028401] [2022-03-15 16:42:16,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:16,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:16,373 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:16,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 16:42:16,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:16,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:16,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:42:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:16,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:16,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:42:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:17,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:17,026 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 30 treesize of output 55 [2022-03-15 16:42:17,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:17,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:17,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:17,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:17,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:17,131 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:17,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:17,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:17,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645028401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:17,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:17,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:17,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13636642] [2022-03-15 16:42:17,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:17,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:17,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:17,212 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:17,522 INFO L93 Difference]: Finished difference Result 16234 states and 57608 transitions. [2022-03-15 16:42:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:17,565 INFO L225 Difference]: With dead ends: 16234 [2022-03-15 16:42:17,565 INFO L226 Difference]: Without dead ends: 16194 [2022-03-15 16:42:17,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:42:17,565 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:17,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-15 16:42:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16194 states. [2022-03-15 16:42:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16194 to 13255. [2022-03-15 16:42:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13254 states have (on average 3.5926512750867663) internal successors, (47617), 13254 states have internal predecessors, (47617), 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 16:42:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 47617 transitions. [2022-03-15 16:42:17,839 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 47617 transitions. Word has length 28 [2022-03-15 16:42:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 47617 transitions. [2022-03-15 16:42:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 47617 transitions. [2022-03-15 16:42:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:17,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:17,865 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, 1, 1] [2022-03-15 16:42:17,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 16:42:18,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 16:42:18,081 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -429594712, now seen corresponding path program 131 times [2022-03-15 16:42:18,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:18,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356966315] [2022-03-15 16:42:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:18,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:18,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356966315] [2022-03-15 16:42:18,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356966315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:18,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127041243] [2022-03-15 16:42:18,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:18,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:18,281 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:18,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 16:42:18,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:42:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:18,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:18,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-15 16:42:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:18,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-15 16:42:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:18,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:19,041 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:19,041 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 30 treesize of output 55 [2022-03-15 16:42:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:19,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:19,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:19,187 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:19,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:19,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:19,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:19,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127041243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:19,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:19,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:19,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179545670] [2022-03-15 16:42:19,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:19,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:19,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:19,313 INFO L87 Difference]: Start difference. First operand 13255 states and 47617 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:19,746 INFO L93 Difference]: Finished difference Result 16228 states and 57590 transitions. [2022-03-15 16:42:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:19,790 INFO L225 Difference]: With dead ends: 16228 [2022-03-15 16:42:19,790 INFO L226 Difference]: Without dead ends: 16188 [2022-03-15 16:42:19,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:42:19,790 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:19,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 265 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 556 Invalid, 0 Unknown, 364 Unchecked, 0.2s Time] [2022-03-15 16:42:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2022-03-15 16:42:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 13252. [2022-03-15 16:42:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13251 states have (on average 3.5927099841521395) internal successors, (47607), 13251 states have internal predecessors, (47607), 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 16:42:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 47607 transitions. [2022-03-15 16:42:20,062 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 47607 transitions. Word has length 28 [2022-03-15 16:42:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:20,062 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 47607 transitions. [2022-03-15 16:42:20,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 16:42:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 47607 transitions. [2022-03-15 16:42:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:20,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:20,088 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, 1, 1] [2022-03-15 16:42:20,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-15 16:42:20,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:20,304 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash 495899154, now seen corresponding path program 132 times [2022-03-15 16:42:20,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:20,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682442056] [2022-03-15 16:42:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:20,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:20,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682442056] [2022-03-15 16:42:20,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682442056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:20,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305352385] [2022-03-15 16:42:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:20,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:20,509 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:20,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 16:42:20,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:42:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:42:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:20,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:20,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-03-15 16:42:20,916 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 69 treesize of output 59 [2022-03-15 16:42:21,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:21,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 59 [2022-03-15 16:42:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:21,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:21,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:21,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:21,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 79 [2022-03-15 16:42:22,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:22,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 90 [2022-03-15 16:42:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:22,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305352385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:22,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:22,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-15 16:42:22,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156390819] [2022-03-15 16:42:22,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:42:22,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:42:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:42:22,748 INFO L87 Difference]: Start difference. First operand 13252 states and 47607 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 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 16:42:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:25,525 INFO L93 Difference]: Finished difference Result 22494 states and 78741 transitions. [2022-03-15 16:42:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:42:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 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 16:42:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:25,583 INFO L225 Difference]: With dead ends: 22494 [2022-03-15 16:42:25,584 INFO L226 Difference]: Without dead ends: 22457 [2022-03-15 16:42:25,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:42:25,584 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 248 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:25,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 318 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 742 Invalid, 0 Unknown, 1298 Unchecked, 0.4s Time] [2022-03-15 16:42:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22457 states. [2022-03-15 16:42:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22457 to 13326. [2022-03-15 16:42:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13325 states have (on average 3.588893058161351) internal successors, (47822), 13325 states have internal predecessors, (47822), 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 16:42:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 47822 transitions. [2022-03-15 16:42:26,016 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 47822 transitions. Word has length 28 [2022-03-15 16:42:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 47822 transitions. [2022-03-15 16:42:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 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 16:42:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 47822 transitions. [2022-03-15 16:42:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:26,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:26,041 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, 1, 1] [2022-03-15 16:42:26,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 16:42:26,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:26,257 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1588869650, now seen corresponding path program 133 times [2022-03-15 16:42:26,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:26,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681141100] [2022-03-15 16:42:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:26,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:26,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681141100] [2022-03-15 16:42:26,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681141100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:26,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090573955] [2022-03-15 16:42:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:26,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:26,475 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:26,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 16:42:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:26,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:26,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:26,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:42:27,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:27,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:27,189 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:27,189 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 30 treesize of output 55 [2022-03-15 16:42:27,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:27,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:27,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,341 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:27,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:27,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:27,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:27,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090573955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:27,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:27,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:27,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545626679] [2022-03-15 16:42:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:27,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:27,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:27,477 INFO L87 Difference]: Start difference. First operand 13326 states and 47822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:27,998 INFO L93 Difference]: Finished difference Result 16438 states and 58225 transitions. [2022-03-15 16:42:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:28,046 INFO L225 Difference]: With dead ends: 16438 [2022-03-15 16:42:28,046 INFO L226 Difference]: Without dead ends: 16423 [2022-03-15 16:42:28,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:42:28,047 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:28,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 220 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 712 Invalid, 0 Unknown, 298 Unchecked, 0.3s Time] [2022-03-15 16:42:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16423 states. [2022-03-15 16:42:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16423 to 13316. [2022-03-15 16:42:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 13315 states have (on average 3.590837401426962) internal successors, (47812), 13315 states have internal predecessors, (47812), 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 16:42:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 47812 transitions. [2022-03-15 16:42:28,407 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 47812 transitions. Word has length 28 [2022-03-15 16:42:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 13316 states and 47812 transitions. [2022-03-15 16:42:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 47812 transitions. [2022-03-15 16:42:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:28,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:28,434 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, 1, 1] [2022-03-15 16:42:28,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 16:42:28,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:28,647 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1983508238, now seen corresponding path program 134 times [2022-03-15 16:42:28,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:28,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889750628] [2022-03-15 16:42:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:28,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:28,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889750628] [2022-03-15 16:42:28,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889750628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:28,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28532447] [2022-03-15 16:42:28,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:28,849 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:28,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 16:42:28,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:28,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:29,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:29,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:42:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-15 16:42:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:29,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:29,565 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:29,565 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 30 treesize of output 55 [2022-03-15 16:42:29,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 16:42:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,706 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:29,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:29,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:29,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:29,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28532447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:29,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:29,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:42:29,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310658945] [2022-03-15 16:42:29,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:29,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:29,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:29,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:29,812 INFO L87 Difference]: Start difference. First operand 13316 states and 47812 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:30,254 INFO L93 Difference]: Finished difference Result 16291 states and 57840 transitions. [2022-03-15 16:42:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:30,302 INFO L225 Difference]: With dead ends: 16291 [2022-03-15 16:42:30,302 INFO L226 Difference]: Without dead ends: 16276 [2022-03-15 16:42:30,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:42:30,303 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:30,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 268 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 564 Invalid, 0 Unknown, 501 Unchecked, 0.2s Time] [2022-03-15 16:42:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2022-03-15 16:42:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 13344. [2022-03-15 16:42:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 13343 states have (on average 3.5899722701041745) internal successors, (47901), 13343 states have internal predecessors, (47901), 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 16:42:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 47901 transitions. [2022-03-15 16:42:30,633 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 47901 transitions. Word has length 28 [2022-03-15 16:42:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:30,633 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 47901 transitions. [2022-03-15 16:42:30,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 16:42:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 47901 transitions. [2022-03-15 16:42:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:30,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:30,659 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, 1, 1] [2022-03-15 16:42:30,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:30,867 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1243584494, now seen corresponding path program 135 times [2022-03-15 16:42:30,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:30,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319357231] [2022-03-15 16:42:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:31,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:31,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319357231] [2022-03-15 16:42:31,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319357231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:31,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272229127] [2022-03-15 16:42:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:31,067 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 16:42:31,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:42:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:31,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:31,477 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 24 treesize of output 20 [2022-03-15 16:42:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:31,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:42:31,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:31,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:31,661 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:31,661 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 30 treesize of output 55 [2022-03-15 16:42:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:31,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,821 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:31,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:31,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:31,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:31,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272229127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:31,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:31,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:31,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575556643] [2022-03-15 16:42:31,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:31,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:31,939 INFO L87 Difference]: Start difference. First operand 13344 states and 47901 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:32,537 INFO L93 Difference]: Finished difference Result 16489 states and 58443 transitions. [2022-03-15 16:42:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:42:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:32,576 INFO L225 Difference]: With dead ends: 16489 [2022-03-15 16:42:32,576 INFO L226 Difference]: Without dead ends: 16467 [2022-03-15 16:42:32,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:42:32,577 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:32,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 214 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 589 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-03-15 16:42:32,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2022-03-15 16:42:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 13355. [2022-03-15 16:42:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13355 states, 13354 states have (on average 3.5897109480305525) internal successors, (47937), 13354 states have internal predecessors, (47937), 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 16:42:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13355 states to 13355 states and 47937 transitions. [2022-03-15 16:42:32,834 INFO L78 Accepts]: Start accepts. Automaton has 13355 states and 47937 transitions. Word has length 28 [2022-03-15 16:42:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:32,834 INFO L470 AbstractCegarLoop]: Abstraction has 13355 states and 47937 transitions. [2022-03-15 16:42:32,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13355 states and 47937 transitions. [2022-03-15 16:42:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:32,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:32,860 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, 1, 1] [2022-03-15 16:42:32,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:33,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 16:42:33,076 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1394116370, now seen corresponding path program 136 times [2022-03-15 16:42:33,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:33,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336522063] [2022-03-15 16:42:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:33,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:33,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336522063] [2022-03-15 16:42:33,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336522063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:33,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319805924] [2022-03-15 16:42:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:33,224 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 16:42:33,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:33,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:33,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:33,440 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 31 treesize of output 27 [2022-03-15 16:42:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:33,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-03-15 16:42:33,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-15 16:42:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:33,586 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:33,586 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 30 treesize of output 55 [2022-03-15 16:42:33,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:33,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,850 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:33,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:33,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319805924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:33,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:33,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:33,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61098098] [2022-03-15 16:42:33,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:33,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:33,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:33,976 INFO L87 Difference]: Start difference. First operand 13355 states and 47937 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:34,447 INFO L93 Difference]: Finished difference Result 16399 states and 58176 transitions. [2022-03-15 16:42:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:42:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:34,490 INFO L225 Difference]: With dead ends: 16399 [2022-03-15 16:42:34,490 INFO L226 Difference]: Without dead ends: 16384 [2022-03-15 16:42:34,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:42:34,490 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:34,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 218 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 871 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-03-15 16:42:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16384 states. [2022-03-15 16:42:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16384 to 13379. [2022-03-15 16:42:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13379 states, 13378 states have (on average 3.5891015099416954) internal successors, (48015), 13378 states have internal predecessors, (48015), 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 16:42:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13379 states to 13379 states and 48015 transitions. [2022-03-15 16:42:34,762 INFO L78 Accepts]: Start accepts. Automaton has 13379 states and 48015 transitions. Word has length 28 [2022-03-15 16:42:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:34,762 INFO L470 AbstractCegarLoop]: Abstraction has 13379 states and 48015 transitions. [2022-03-15 16:42:34,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13379 states and 48015 transitions. [2022-03-15 16:42:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:34,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:34,788 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, 1, 1] [2022-03-15 16:42:34,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:34,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 16:42:34,996 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1422186770, now seen corresponding path program 137 times [2022-03-15 16:42:34,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:34,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354764392] [2022-03-15 16:42:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:35,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354764392] [2022-03-15 16:42:35,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354764392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:35,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382807075] [2022-03-15 16:42:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:35,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:35,208 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:35,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 16:42:35,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:42:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:35,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:35,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-15 16:42:35,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:35,806 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:35,807 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 30 treesize of output 55 [2022-03-15 16:42:35,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:35,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:35,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,946 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:35,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:35,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:35,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:36,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382807075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:36,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:36,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:36,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029150905] [2022-03-15 16:42:36,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:36,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:36,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:36,026 INFO L87 Difference]: Start difference. First operand 13379 states and 48015 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:36,438 INFO L93 Difference]: Finished difference Result 16427 states and 58227 transitions. [2022-03-15 16:42:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:36,477 INFO L225 Difference]: With dead ends: 16427 [2022-03-15 16:42:36,478 INFO L226 Difference]: Without dead ends: 16405 [2022-03-15 16:42:36,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:42:36,478 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:36,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 753 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-03-15 16:42:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2022-03-15 16:42:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 13384. [2022-03-15 16:42:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 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 16:42:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-03-15 16:42:36,732 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-03-15 16:42:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:36,732 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-03-15 16:42:36,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-03-15 16:42:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:36,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:36,759 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, 1, 1] [2022-03-15 16:42:36,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:36,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 16:42:36,975 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash 64634450, now seen corresponding path program 138 times [2022-03-15 16:42:36,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:36,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833702941] [2022-03-15 16:42:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:36,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:37,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833702941] [2022-03-15 16:42:37,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833702941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:37,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165621892] [2022-03-15 16:42:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:37,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:37,115 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:37,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 16:42:37,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:42:37,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:37,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:37,470 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 24 treesize of output 20 [2022-03-15 16:42:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:37,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-15 16:42:37,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:42:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:37,641 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:37,642 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 30 treesize of output 55 [2022-03-15 16:42:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:37,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:37,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,756 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:37,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-15 16:42:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:37,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165621892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:37,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:37,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:37,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746241338] [2022-03-15 16:42:37,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:37,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:37,854 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:38,405 INFO L93 Difference]: Finished difference Result 16415 states and 58199 transitions. [2022-03-15 16:42:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:38,448 INFO L225 Difference]: With dead ends: 16415 [2022-03-15 16:42:38,448 INFO L226 Difference]: Without dead ends: 16393 [2022-03-15 16:42:38,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:42:38,448 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:38,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 199 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 722 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-03-15 16:42:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2022-03-15 16:42:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 13384. [2022-03-15 16:42:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 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 16:42:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-03-15 16:42:38,728 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-03-15 16:42:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:38,728 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-03-15 16:42:38,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 16:42:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-03-15 16:42:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:38,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:38,755 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, 1, 1] [2022-03-15 16:42:38,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 16:42:38,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 16:42:38,967 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1351336178, now seen corresponding path program 139 times [2022-03-15 16:42:38,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:38,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654237136] [2022-03-15 16:42:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:39,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:39,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654237136] [2022-03-15 16:42:39,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654237136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:39,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593933734] [2022-03-15 16:42:39,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:39,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:39,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:39,204 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 16:42:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:39,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:39,655 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 24 treesize of output 20 [2022-03-15 16:42:39,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-15 16:42:39,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-15 16:42:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:39,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:39,836 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:39,836 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 33 treesize of output 58 [2022-03-15 16:42:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:39,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:42:39,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,953 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:39,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:40,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:40,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593933734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:40,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:40,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:40,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508968863] [2022-03-15 16:42:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:40,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:40,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:40,070 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:42:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:41,408 INFO L93 Difference]: Finished difference Result 16590 states and 58631 transitions. [2022-03-15 16:42:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:42:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:42:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:41,449 INFO L225 Difference]: With dead ends: 16590 [2022-03-15 16:42:41,449 INFO L226 Difference]: Without dead ends: 16534 [2022-03-15 16:42:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:42:41,449 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 510 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:42:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2022-03-15 16:42:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 13423. [2022-03-15 16:42:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13423 states, 13422 states have (on average 3.5890329310087914) internal successors, (48172), 13422 states have internal predecessors, (48172), 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 16:42:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 48172 transitions. [2022-03-15 16:42:41,721 INFO L78 Accepts]: Start accepts. Automaton has 13423 states and 48172 transitions. Word has length 28 [2022-03-15 16:42:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:41,721 INFO L470 AbstractCegarLoop]: Abstraction has 13423 states and 48172 transitions. [2022-03-15 16:42:41,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 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 16:42:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 13423 states and 48172 transitions. [2022-03-15 16:42:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:41,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:41,748 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, 1, 1] [2022-03-15 16:42:41,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:41,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:41,964 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -677061838, now seen corresponding path program 140 times [2022-03-15 16:42:41,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:41,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181821812] [2022-03-15 16:42:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:42,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181821812] [2022-03-15 16:42:42,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181821812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864304701] [2022-03-15 16:42:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:42,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:42,186 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:42,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 16:42:42,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:42,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 16:42:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:42,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:42:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:42,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-03-15 16:42:42,578 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 14 [2022-03-15 16:42:42,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-15 16:42:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:42,782 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:42:42,783 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 33 treesize of output 58 [2022-03-15 16:42:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:42,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:42:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,906 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-15 16:42:42,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-15 16:42:42,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:42,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:42,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:42:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:43,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864304701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:43,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:43,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:42:43,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91861618] [2022-03-15 16:42:43,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:43,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:42:43,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:42:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:43,026 INFO L87 Difference]: Start difference. First operand 13423 states and 48172 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:42:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:43,586 INFO L93 Difference]: Finished difference Result 13748 states and 49036 transitions. [2022-03-15 16:42:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:42:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:43,622 INFO L225 Difference]: With dead ends: 13748 [2022-03-15 16:42:43,622 INFO L226 Difference]: Without dead ends: 13733 [2022-03-15 16:42:43,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:42:43,623 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:43,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 338 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 932 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2022-03-15 16:42:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13733 states. [2022-03-15 16:42:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13733 to 13449. [2022-03-15 16:42:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13449 states, 13448 states have (on average 3.5883402736466388) internal successors, (48256), 13448 states have internal predecessors, (48256), 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 16:42:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 48256 transitions. [2022-03-15 16:42:43,906 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 48256 transitions. Word has length 28 [2022-03-15 16:42:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:43,906 INFO L470 AbstractCegarLoop]: Abstraction has 13449 states and 48256 transitions. [2022-03-15 16:42:43,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 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 16:42:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 48256 transitions. [2022-03-15 16:42:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:42:43,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:43,931 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, 1, 1] [2022-03-15 16:42:43,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 16:42:44,143 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1456034806, now seen corresponding path program 141 times [2022-03-15 16:42:44,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:44,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186235020] [2022-03-15 16:42:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:44,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:44,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186235020] [2022-03-15 16:42:44,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186235020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:44,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301916752] [2022-03-15 16:42:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:44,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:44,358 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:44,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 16:42:44,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:44,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:44,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:42:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:44,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-15 16:42:44,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:42:44,815 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 14 [2022-03-15 16:42:44,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:44,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-03-15 16:51:03,565 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:51:03,568 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:51:03,570 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:51:03,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 16:51:03,595 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:51:03,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:51:03,786 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. [2022-03-15 16:51:03,788 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:51:03,788 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:51:03,788 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:51:03,813 INFO L732 BasicCegarLoop]: Path program histogram: [141, 5, 2, 1, 1, 1] [2022-03-15 16:51:03,815 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:51:03,815 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:51:03,817 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:51:03 BasicIcfg [2022-03-15 16:51:03,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:51:03,818 INFO L158 Benchmark]: Toolchain (without parser) took 870558.56ms. Allocated memory was 189.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 149.7MB in the beginning and 542.2MB in the end (delta: -392.5MB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 189.8MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.24ms. Allocated memory is still 189.8MB. Free memory was 149.7MB in the beginning and 148.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 INFO L158 Benchmark]: Boogie Preprocessor took 16.87ms. Allocated memory is still 189.8MB. Free memory was 148.1MB in the beginning and 147.2MB in the end (delta: 928.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 INFO L158 Benchmark]: RCFGBuilder took 172.28ms. Allocated memory is still 189.8MB. Free memory was 147.1MB in the beginning and 137.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 INFO L158 Benchmark]: TraceAbstraction took 870344.96ms. Allocated memory was 189.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 137.2MB in the beginning and 542.2MB in the end (delta: -405.0MB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-03-15 16:51:03,818 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 189.8MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.24ms. Allocated memory is still 189.8MB. Free memory was 149.7MB in the beginning and 148.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.87ms. Allocated memory is still 189.8MB. Free memory was 148.1MB in the beginning and 147.2MB in the end (delta: 928.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.28ms. Allocated memory is still 189.8MB. Free memory was 147.1MB in the beginning and 137.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 870344.96ms. Allocated memory was 189.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 137.2MB in the beginning and 542.2MB in the end (delta: -405.0MB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 40 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 870.2s, OverallIterations: 151, TraceHistogramMax: 2, PathProgramHistogramMax: 141, EmptinessCheckTime: 2.7s, AutomataDifference: 156.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21005 SdHoareTripleChecker+Valid, 48.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21005 mSDsluCounter, 40114 SdHoareTripleChecker+Invalid, 41.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60372 IncrementalHoareTripleChecker+Unchecked, 67982 mSDsCounter, 4307 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108260 IncrementalHoareTripleChecker+Invalid, 172939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4307 mSolverCounterUnsat, 4476 mSDtfsCounter, 108260 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11466 GetRequests, 5793 SyntacticMatches, 623 SemanticMatches, 5050 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 80441 ImplicationChecksByTransitivity, 128.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13449occurred in iteration=150, InterpolantAutomatonStates: 4399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 31.2s AutomataMinimizationTime, 150 MinimizatonAttempts, 531030 StatesRemovedByMinimization, 150 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 142.4s InterpolantComputationTime, 7858 NumberOfCodeBlocks, 7858 NumberOfCodeBlocksAsserted, 480 NumberOfCheckSat, 11282 ConstructedInterpolants, 1162 QuantifiedInterpolants, 285645 SizeOfPredicates, 1175 NumberOfNonLiveVariables, 11431 ConjunctsInSsa, 4722 ConjunctsInUnsatCore, 434 InterpolantComputations, 8 PerfectInterpolantSequences, 205/4606 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown